CN102251131B - Method for preparing injection-molding nickel-base ODS (oxide dispersion strengthened) alloy - Google Patents

Abstract

Translated fromChinese

本发明提供一种注射成形工艺制备镍基氧化物弥散强化(Oxide Dispersion Strengthening，ODS)合金的方法，属于粉末注射成形技术领域，其工艺流程为：首先将原料粉末进行高能球磨使Y₂O₃颗粒均匀分散在镍基体中，然后采用气流磨使机械合金粉末细化，接着将气流磨细化后的粉末进行等离子体球化。气流磨细化和等离子球化后的粉末与粘结剂混合均匀后进行混炼，制得均匀喂料。喂料经过注射成形、两步脱脂和烧结后得到致密度为93-96％的烧结坯，烧结坯经过热等静压后达到全致密，最后经过固溶和时效热处理得到注射成形镍基ODS合金。本发明的优点是能够制备出形状复杂和高精度的零件，解决了镍基ODS合金成形加工困难的难题。γ′相和氧化物强化机制相结合大幅度拓展了镍基ODS合金的高温力学性能。

The invention provides a method for preparing a nickel-based oxide dispersion strengthening (Oxide Dispersion Strengthening_, ODS) alloy by injection molding, which belongs to the technical field of powder injection molding_. The particles are evenly dispersed in the nickel matrix, and then the mechanical alloy powder is refined by using a jet mill, and then the refined powder of the jet mill is subjected to plasma spheroidization. The jet milled and plasma spheroidized powder is evenly mixed with the binder and then kneaded to obtain a uniform feed. After the feeding is injection-molded, two-step degreasing and sintering, a sintered billet with a density of 93-96% is obtained, and the sintered billet is fully dense after hot isostatic pressing, and finally an injection-molded nickel-based ODS alloy is obtained through solution and aging heat treatment . The invention has the advantages of being able to prepare parts with complex shapes and high precision, and solving the difficult problem of nickel-based ODS alloy forming and processing. The combination of γ′ phase and oxide strengthening mechanism greatly expands the high-temperature mechanical properties of Ni-based ODS alloys.

Description

A kind of method for preparing the Ni-based ODS alloy of injection forming

Technical field

The invention belongs to the powder injection forming technical field, providing a kind of especially is feedstock production injection forming nickel-based oxide dispersion-strengthened (Oxide Dispersion Strengthening, ODS) method of alloy with pre-treatment machinery alloying powder.

Background technology

Ni-based ODS alloy still has excellent high temperature creep property, fatigue property and antioxidant property more than 1000 ℃.The middle temperature of nickel-base alloy (700～900 ℃) intensity is lower, through the interpolation formation L1 of elements such as Al, Ti and Nb₂γ ' [the Ni of structure₃(Al, Ti)] precipitated phase can effectively improve medium temperature intensity.Under higher temperature (＞1000 ℃), γ ' phase is owing to dissolving loses strengthening effect, and this moment, the dispersion-strengthened mechanism of steady oxide accounted for leading.γ ' phase is a kind of important high-temperature structural material with the Ni-based ODS alloy that dispersed oxide is strengthened mutually altogether, and it can be used as some the crucial high-temperature components in gas turbine engine, aircraft engine and the automobile turbocharger.In gas turbine engine, in order to raise the efficiency, turbine front end inlet temperature increases to about 1500 ℃ by 600-700 ℃ of the initial stage, and this is to the demands for higher performance of high temperature components material (particularly blade material).In automobile-used field, turbocharging technology is to improve automobile engine power, cut down the consumption of energy and automotive industry realizes one of effective means of target for energy-saving and emission-reduction.Turbine is the core component in the automobile turbocharger.At present, turbocharging technology is just progressively popularized to petrol motor, and the exhaust temperature of petrol motor supercharging rear engine is up to 1050 ℃, and common nickel-base alloy can not satisfy request for utilization.

Ni-based ODS alloy is the potential equivalent material of turbine in blade and the automobile turbocharger in the advanced internal combustion turbine; But Ni-based ODS hardness of alloy is high, plasticity is low and formability is poor; Be difficult to prepare parts such as complex-shaped blade or turbine through traditional machine-tooled method, this has seriously restricted applying of Ni-based ODS alloy.Be devoted to the exploitation of Ni-based ODS superalloy and the research of advanced forming technique thereof in the world always.The powder injection forming technology is suitable for preparing high pressure blade and moderate, the complex-shaped part of turbine equidimension in the vehicle turbocharger in the internal combustion turbine; It has that near-net forming, homogeneous microstructure, performance are high, precision is high and series of advantages such as cost is low, can also effectively avoid nonmetal inclusion that cast Ni-base alloy exists, component segregation and defective such as loose.

Mechanical alloying is the requisite technology of preparation injection forming Ni-based ODS powdered alloy raw material, but the mechanical alloy powder is not suitable for carrying out injection forming owing to out-of-shape, powder agglomeration and particle diameter are thick.Therefore, must carry out pre-treatment, to make the powder that particle diameter and shape all are fit to injection forming to the mechanical alloy powder.Utilization can be carried out modification to the particle diameter and the shape of mechanical alloying powder to spray formula airflow milling and radio-frequency plasma spheronization techniques.Inject after utilizing superonic flow nozzzle that high pressure gas are quickened to spray formula airflow milling and pulverize the district, material particles is accelerated and reaches in the collision of nozzle intersection the purpose of pulverizing under the effect of the huge kinetic energy of high-speed gas.The radio-frequency plasma spheronization techniques is that powder particle in irregular shape is sprayed in the plasma furnace through feeding gun by carrying gas; Quilt heats rapidly and melts under radiation, convection current, conduction and four kinds of heat transfer mechanism effects of chemistry; Melt granules forms spherical droplets under surface tension effects; And under high thermograde, solidify rapidly, thereby obtain spherical powder.

It is thus clear that, after handling through airflow milling refinement and plasma body nodularization, the mechanical alloy powder can obtain to be fit to the fine particle spherical powder of injection molding process, and injection forming has successfully solved the difficult problem of Ni-based ODS alloy near-net forming.The development of the Ni-based ODS alloy of injection forming will promote applying of Ni-based ODS alloy greatly.

Summary of the invention

The object of the present invention is to provide a kind of method for preparing the Ni-based ODS alloy of injection forming, be intended to solve the difficult problem of Ni-based ODS alloy near-net forming, have that microstructure is even, performance is high, precision is high, material use efficiency is high and low cost and other advantages.

The present invention at first adopts mechanical alloying prepared oxide dispersion intensifying Co-based alloy powder; Particle diameter is tiny uses powder stock with the spheric injection forming to obtain then the mechanical alloying powder to be carried out pre-treatment (airflow milling refinement and plasma body nodularization); Then pretreated mechanical alloying powder is carried out injection forming, hot isostatic pressing and thermal treatment; Obtain the Ni-based ODS alloy of injection forming at last, preparation technology is as shown in Figure 1, and concrete process step is:

1, mechanical alloying: with Co-based alloy powder, Y₂O₃Particle and the crude granule pre-mixing of Hf unit are even, in high-purity Ar atmosphere, pass through high-energy ball milling then with 0.8-1.5wt%Y₂O₃The Hf element uniform particles of particle and 0.8-3.0wt% is dispersed in the matrix.The rotating speed of ball mill is 380～500 rev/mins, and the ball milling time is 36-72 hour.The pattern of mechanical alloying powder is as shown in Figure 2;

The composition of described Co-based alloy powder is the nickel base superalloy of various standard brands, or according to the non-standard alloy of actual condition design.Nickel base superalloy is selected from: Nimonic 90 (USS), Inconel718 (USS), Inconel 713C (USS), HastelloyX (USS), GH4195 (GB) or GH4195 (GB); Raw material powder adds with the form of element powders, perhaps adopts the pre-alloyed powder of high pressure gas atomizing or water atomization prepared.

2, to spray formula airflow milling: the mechanical alloying powder is handled through spray formula airflow milling is carried out dispersion and fining.Control the particle diameter of powder through pilot-gas flow, WP, sorting ability frequency.Gaseous tension is 3～8MPa, and the separation wheel frequency is 40～60Hz, and the powder diameter after airflow milling is handled is 10-40 μ m.Fig. 3 is the powder morphology figure after spray formula airflow milling is handled.Visible by figure, the obvious refinement of powder after airflow milling is handled, reunion powder disappears;

3, plasma body nodularization: the powder after the airflow milling refinement is carried out plasma spheroidization handle,, make the powder sphericity high as far as possible through parameters such as control powder feeding rate and gas operational throughpuies.Powder feeding rate is 30～200gmin^-1, the plasma output rating is 50～90KW, negative pressure is 7000～12000Pa.Fig. 4 is the SEM shape appearance figure of plasma spheroidization powder, can find out that the nodularization effect of powder is remarkable;

4, mixing: it is that mixing 0.5-1.5h processes even feeding under 30-50 rev/min the condition in 145-170 ℃, rotating speed in duplicate rows star mixing roll that airflow milling refinement powder and plasma spheroidization powder and sticker mix the back, and wherein the powder tonburden is 55-65vol%.

Described sticker adopts cerul multicomponent polymeric system, and the ratio of each constituent element is: 50-70wt% paraffin, 10-20% high density polyethylene(HDPE), 10-20% Vestolen PP 7052 and surplus Triple Pressed Stearic Acid;

5, injection forming: on injection machine, carry out injection forming, obtain the desired shape part.Injection temperature is that 150-175 ℃, injection pressure are 75-125MPa;

6, degreasing: the injection base adopts solvent degreasing and two step of hot degreasing degreasing process, in organic solvents such as trieline or trichloroethane, soaks 5-12h in 45-60 ℃ earlier; In high-purity argon gas atmosphere, carry out hot degreasing then in 25-1100 ℃;

7, sintering: the degreasing base carries out sintering in vacuum atmosphere or high-purity argon gas protective atmosphere, and sintering temperature is 1270-1360 ℃, and soaking time is 1-3h;

8, hot isostatic pressing: sintered blank is carried out hot isostatic pressing in 1000-1200 ℃ TR, and pressure is 100-200MPa, and soaking time is 1-3h, obtains complete fine and close Ni-based ODS alloy;

9, thermal treatment: the goods behind the hot isostatic pressing carry out solution treatment at 1100-1250 ℃, and water-cooled behind the insulation 2-6h then at 650-850 ℃ of ageing treatment 8-24h, finally obtains the Ni-based ODS alloy of injection forming.

Advantage of the present invention is that the particle diameter of the mechanical alloying powder behind airflow milling refinement and the plasma spheroidization is little, sphericity is high, is fit to carry out injection forming.Hot isostatic pressing has further improved comprehensive mechanical performance; Thereby prepare high-performance, high precision, complex-shaped part; Successfully solved the difficult problem of the difficult processing that is shaped of Ni-based ODS alloy, avoided the cast Ni-base alloy problem in addition, the problem includes: problems such as nonmetal inclusion, component segregation and rarefaction defects.Precipitation hardened the combining with oxide dispersion intensifying mechanism of γ ' expanded the mechanical behavior under high temperature of Ni-based ODS alloy significantly.

Description of drawings

Fig. 1 is a process flow sheet of the present invention

Fig. 2 is mechanical alloying powder SEM figure

Fig. 3 is airflow milling refinement powder SEM figure

Fig. 4 is plasma spheroidization powder SEM figure

Fig. 5 (a) is γ ' phase SEM figure in the Ni-based ODS alloy of injection forming

With dispersed oxide TEM figure (b) mutually

Embodiment

Embodiment 1: with the airflow milling fine powder is that feedstock production does not have γ ' and strengthens the Ni-based ODS alloy of injection forming mutually

With the granularity is the Y of 20-30nm₂O₃Particle and high-purity N i powder, Cr powder, Co powder, Mo powder, W powder, Fe powder, Si powder, Hf powder and C powder are raw material, by following quality percentage composition preparation mixed powder: 21%Cr, 1.5%Co, 9%Mo, 0.5%W, 18%Fe, 0.8%Si, 0.09%C, 1%Y₂O₃, 1.2%Hf and surplus Ni.At first mixed powder is carried out high-energy ball milling in high-purity Ar atmosphere and make Y₂O₃Uniform particles is dispersed in the Ni matrix, and drum's speed of rotation is 380 rev/mins, and the ball milling time is 40 hours; The mechanical alloy powder adopts airflow milling to carry out broken thinning processing, and air pressure is 6MPa, and sorting can frequency be 45Hz, obtains the powder of the about 20 μ m of median size; Airflow milling particulate powders and sticker mix the back and on duplicate rows star mixing roll, make even feeding in 150 ℃ of mixing 1h; Wherein sticker is made up of 63% paraffin, 13% high density polyethylene(HDPE), 17% Vestolen PP 7052,7% Triple Pressed Stearic Acid, and the powder tonburden is 56vol.%; Feeding is injection forming on CJ80-E type injection machine, and injection temperature is 155 ℃, and injection pressure is 90MPa; The injection base behind the solution-off 10h, carries out hot degreasing in high-purity argon gas atmosphere in trieline solution, hot skimming temp is 900 ℃; The degreasing base in 1300 ℃ of sintering, is incubated 1h in vacuum atmosphere; Sintered blank is at 1100 ℃ of hot isostatic pressings, and pressure is 100MPa, insulation 2h.The density of the Ni-based ODS alloy of gained injection forming is 98.4%, and the oxide particle median size is 14.5nm.

Embodiment 2: with the plasma spheroidization powder is that feedstock production does not have γ ' and strengthens the Ni-based ODS alloy of injection forming mutually

With the granularity is the Y of 20-30nm₂O₃Particle and high-purity N i powder, Cr powder, Co powder, Mo powder, W powder, Fe powder, Si powder, Hf powder and C powder are raw material, by following quality percentage composition preparation mixed powder: 19%Cr, 2%Co, 8%Mo, 1%W, 19%Fe, 0.6%Si, 0.08%C, 1%Y₂O₃, 1.2%Hf and surplus Ni.At first mixed powder is carried out high-energy ball milling in high-purity Ar atmosphere and make Y₂O₃Uniform particles is dispersed in the Ni matrix, and drum's speed of rotation is 450 rev/mins, and the ball milling time is 48 hours; The mechanical alloy powder adopts airflow milling to carry out broken thinning processing, and air pressure is 8MPa, and sorting can frequency be 50Hz, obtains the powder of the about 30 μ m of median size; Powder after the airflow milling refinement is carried out the plasma body nodularization handle, powder feeding rate is 50gmin^-1, the plasma output rating is 70KW, negative pressure is 7000Pa in the chamber; Powder after the nodularization and sticker mix the back and on duplicate rows star mixing roll, make even feeding in 155 ℃ of mixing 1.5h; Wherein sticker is made up of 55% paraffin, 20% high density polyethylene(HDPE), 15% Vestolen PP 7052,10% Triple Pressed Stearic Acid, and the powder tonburden is 64vol.%; Feeding is injection forming on CJ80-E type injection machine, and injection temperature is 160 ℃, and injection pressure is 90MPa; The injection base behind the solution-off 12h, carries out hot degreasing in high-purity argon gas atmosphere in trieline solution, hot skimming temp is 1000 ℃; The degreasing base in 1320 ℃ of sintering, is incubated 2h in high-purity argon gas atmosphere; Sintered blank is at 1150 ℃ of hot isostatic pressings, and pressure is 150MPa, insulation 2h.The density of the Ni-based ODS alloy of gained injection forming is 99.1%, and the oxide particle median size is 11.1nm.

Embodiment 3: prepare γ ' with the airflow milling fine powder and be total to the Ni-based ODS alloy of intensified type injection forming with oxide compound

With the granularity is the Y of 20-30nm₂O₃Particle and high-purity N i powder, Cr powder, Nb powder, Mo powder, Ti powder, Al powder, Fe powder, Si powder, Hf powder and C powder are raw material, by following quality percentage composition preparation mixed powder: 18%Cr, 5%Nb, 3%Mo, 0.4%Al, 1%Ti, 19%Fe, 0.3%Si, 0.36%C, 1%Y₂O₃, 1.2%Hf and surplus Ni.At first mixed powder is carried out high-energy ball milling in high-purity Ar atmosphere and make Y₂O₃Uniform particles is dispersed in the Ni matrix, and drum's speed of rotation is 400 rev/mins, and the ball milling time is 60 hours; The mechanical alloy powder adopts airflow milling to carry out broken thinning processing, and air pressure is 5MPa, and sorting can frequency be 40Hz, obtains the powder of the about 35 μ m of median size; Airflow milling particulate powders and sticker mix the back and on duplicate rows star mixing roll, make even feeding in 160 ℃ of mixing 1.5h; Wherein sticker is made up of 60% paraffin, 15% high density polyethylene(HDPE), 15% Vestolen PP 7052,10% Triple Pressed Stearic Acid, and the powder tonburden is 57vol.%; Feeding is injection forming on CJ80-E type injection machine, and injection temperature is 160 ℃, and injection pressure is 90MPa; The injection base behind the solution-off 8h, carries out hot degreasing in high-purity argon gas atmosphere in trieline solution, hot skimming temp is 1100 ℃; The degreasing base in 1340 ℃ of sintering, is incubated 1h in vacuum atmosphere; Sintered blank is at 1100 ℃ of hot isostatic pressings, and pressure is 200MPa, insulation 2h; The hot isostatic pressing sample is at 1250 ℃ of solution treatment 2h, then at 700 ℃ of ageing treatment 12h.The density of the Ni-based ODS alloy of gained injection forming is 99.2%, and the volume(tric)fraction of γ ' phase is 45%, and particle diameter is 100nm, and the oxide particle median size is 12.8nm.

Embodiment 4: strengthen the Ni-based ODS alloy of injection forming with plasma spheroidization powdered preparation γ ' altogether with oxide compound

With the granularity is the Y of 20-30nm₂O₃Particle and high-purity N i powder, Cr powder, Nb powder, Mo powder, Ti powder, Al powder, Fe powder, Si powder, Hf powder and C powder are raw material, by following quality percentage composition preparation mixed powder: 16%Cr, 16%Co, 1.9%Ti, 0.85%Al, 2%Fe, 0.7%Si, 0.065%C, 1%Y₂O₃, 1.2%Hf and surplus Ni.At first mixed powder is carried out high-energy ball milling in high-purity Ar atmosphere and make Y₂O₃Uniform particles is dispersed in the Ni matrix, and drum's speed of rotation is 400 rev/mins, and the ball milling time is 48 hours; The mechanical alloy powder adopts airflow milling to carry out broken thinning processing, and air pressure is 7MPa, and sorting can frequency be 55Hz, obtains the powder of the about 19 μ m of median size; Powder after the airflow milling refinement is carried out the plasma body nodularization handle, powder feeding rate is 60gmin^-1, the plasma output rating is 80KW, negative pressure is 6000Pa in the chamber; Powder after the nodularization and sticker mix the back and on duplicate rows star mixing roll, make even feeding in 155 ℃ of mixing 2h; Wherein sticker is made up of 55% paraffin, 20% high density polyethylene(HDPE), 10% Vestolen PP 7052,15% Triple Pressed Stearic Acid, and the powder tonburden is 65vol.%; Feeding is injection forming on CJ80-E type injection machine, and injection temperature is 160 ℃, and injection pressure is 90MPa; The injection base behind the solution-off 10h, carries out hot degreasing in high-purity argon gas atmosphere in trieline solution, hot skimming temp is 1000 ℃; The degreasing base in 1290 ℃ of sintering, is incubated 2h in vacuum or high-purity argon gas atmosphere; Sintered blank is at 1200 ℃ of hot isostatic pressings, and pressure is 150MPa, insulation 2h; The hot isostatic pressing sample is at 1200 ℃ of solution treatment 3h, then at 750 ℃ of ageing treatment 10h.The density of the Ni-based ODS alloy of gained injection forming is 99.1%, and the volume(tric)fraction of γ ' phase is 45%, and particle diameter is 100nm, and the oxide particle median size is 8.8nm.

Claims (5)

Translated fromChinese

1.一种制备注射成形镍基ODS合金的方法，其特征在于：1. A method for preparing injection molding nickel-based ODS alloy, characterized in that:a、合金成分设计，在镍基合金基础成分中添加质量分数为0.8～1.5%的Y₂O₃作为氧化物弥散相，添加质量分数为0.8～3.0%的Hf元素作为弥散相细化元素，并将合金成分按比例均匀混合；a. Alloy composition design, adding Y₂ O₃ with a mass fraction of 0.8 to 1.5% in the basic composition of the nickel-based alloy as the oxide disperse phase, and adding 0.8 to 3.0% of the Hf element as the dispersed phase refinement element, And mix the alloy components evenly in proportion;b、高能球磨，通过高能球磨使Y₂O₃颗粒和Hf元素颗粒均匀分散在Ni基体中，添加0.5～5wt%硬脂酸作为过程控制剂，球磨机转速为380～500转/分，球磨时间为36～72小时；b. High-energy ball milling, through high-energy ball milling, Y₂ O₃ particles and Hf element particles are uniformly dispersed in the Ni matrix, 0.5-5wt% stearic acid is added as a process control agent, the ball mill speed is 380-500 rpm, and the ball milling time 36 to 72 hours;c、气流磨细化，采用对喷式气流磨将机械合金化粉末进行破碎细化而得到细粒径粉末，气体压力为3～8MPa、分选轮频率为40～60Hz；c. Jet mill refinement, using counter-jet jet mill to crush and refine the mechanically alloyed powder to obtain fine particle size powder, the gas pressure is 3-8MPa, and the frequency of the sorting wheel is 40-60Hz;d、等离子球化，采用等离子球化使气流磨细化后的不规则粉末转变为球形，送粉速率为30～200g·min^-1，等离子输出功率为50～90kW，负压为7000～12000Pa；d. Plasma spheroidization, using plasma spheroidization to transform the irregular powder after jet milling into a spherical shape, the powder feeding rate is 30-200g·min^-1 , the plasma output power is 50-90kW, and the negative pressure is 7000-12000Pa ;e、混炼和注射成形，气流磨细化粉末和等离子球化粉末与粘结剂混合均匀后在混炼机上于145-170℃进行混炼得到均匀喂料，粘结剂由50-70wt%石蜡、10-20%高密度聚乙烯、10-20%聚丙烯和余量硬脂酸组成，粉末装载量为55-65vol%；喂料在注射温度为145-165℃，注射压力为70-90MPa的条件下注射成形，得到无缺陷注射坯；e. Mixing and injection molding, air jet milling powder and plasma spheroidizing powder are evenly mixed with binder, and then mixed on a mixer at 145-170°C to obtain uniform feeding. The binder is 50-70wt% Composed of paraffin wax, 10-20% high-density polyethylene, 10-20% polypropylene and the balance of stearic acid, the powder loading is 55-65vol%; the feeding temperature is 145-165℃, and the injection pressure is 70- Injection molding under the condition of 90MPa to obtain a defect-free injection blank;f、步骤e得到的注射坯采用“溶脱加热脱”的工艺进行脱脂，先在三氯乙烯中浸泡8-12h，然后在25-1100℃进行热脱脂，时间8-12h；f. The injection base obtained in step e is degreased by the process of "dissolving, heating and degreasing", soaking in trichlorethylene for 8-12 hours, and then thermally degreasing at 25-1100°C for 8-12 hours;g、烧结，步骤f得到的脱脂坯在1270-1360℃烧结1-3h，得到的烧结坯致密度达到93-95%；g, sintering, the degreased body obtained in step f is sintered at 1270-1360°C for 1-3h, and the density of the obtained sintered body reaches 93-95%;h、热等静压，步骤g得到的烧结坯在1000～1200℃、100-200MPa热等静压1-3h，使烧结坯全致密；h, hot isostatic pressing, the sintered compact obtained in step g is hot isostatic pressed at 1000-1200 ° C and 100-200 MPa for 1-3 hours, so that the sintered compact is fully dense;i、热处理，热等静压后的制品采用固溶和时效处理优化γ′相的粒径和粒径分布，在1100-1250℃固溶处理2-6h，在650-850℃时效处理8-24h，最终得到注射成形镍基ODS合金。i. After heat treatment, the products after hot isostatic pressing are treated with solid solution and aging treatment to optimize the particle size and particle size distribution of the γ′ phase. Solution treatment at 1100-1250°C for 2-6h, aging treatment at 650-850°C for 8- After 24 hours, the injection-molded nickel-based ODS alloy was finally obtained.2.根据权利要求1所述制备注射成形镍基ODS合金的方法，其特征在于：a步骤中采用的镍基合金粉末为选自Nimonic 90、Inconel 718、Inconel 713C、Hastelloy X、GH4195或GH4195的各种标准牌号的镍基高温合金，或者是根据实际工况设计的非标准合金成分；合金粉末采用元素粉末进行混合，或者采用高压气雾化或水雾化法进行预合金化。2. the method for preparing injection molding nickel-based ODS alloy according to claim 1 is characterized in that: the nickel-based alloy powder that adopts in a step is selected from Nimonic 90, Inconel 718, Inconel 713C, Hastelloy X, GH4195 or GH4195 Various standard grades of nickel-based superalloys, or non-standard alloy components designed according to actual working conditions; alloy powders are mixed with elemental powders, or pre-alloyed by high-pressure gas atomization or water atomization.3.根据权利要求1所述制备注射成形镍基ODS合金的方法，其特征在于：a步骤中添加Y₂O₃的粒径为20-30nm。 3. The method for preparing an injection_- molded nickel-based ODS alloy according to claim 1, characterized in that: the particle size of_Y2O3 added in step a is 20-30nm.4.根据权利要求1所述制备注射成形镍基ODS合金的方法，其特征在于：在b步骤的高能球磨、c步骤的气流磨破碎、f步骤的热脱脂和g步骤的烧结过程中采用纯度99.999%以上的氩气作为保护气氛。4. prepare the method for injection molding nickel-base ODS alloy according to claim 1, it is characterized in that: in the sintering process of the high-energy ball milling of b step, the jet mill of c step, the thermal degreasing of f step and g step, adopt purity More than 99.999% argon is used as the protective atmosphere.5.根据权利要求1所述制备注射成形镍基ODS合金的方法，其特征在于：c步骤中气流磨处理后的粉末粒径为10-40μm。 5. The method for preparing an injection-molded nickel-based ODS alloy according to claim 1, characterized in that: in step c, the powder particle size after jet milling is 10-40 μm. the

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