A kind of nickel chromium triangle molybdenum base WC40 steel bonded carbide Roll Collar and its manufacture methodTechnical field
The present invention relates to a kind of steel rolling deflector roll, especially a kind of Ni-Cr-Mo for steel rolling continuous-rolling system rolling guideBase WC40 steel bonded carbide Roll Collars.
Background technology
Guide and guards refers to a kind of important spare part for guiding and escorting rolled piece to pass in and out milling train during Rolling production, is usedIn guiding rolled piece to pass in and out pass by required state during section rolling, to ensure that rolled piece realizes set deformation.LeadWhether the design and use for defending device are proper, directly influence the quality of product and the production capacity of milling train.
Rolling guide be steel rolling mill when section bar, bar or wire rod rolling is carried out, rolled piece is led into milling trainA kind of guider in roll pass.The steel rolling that Roll Collar is mainly guiding, auxiliary rolling blank or finished product run through is usedGuide device device, deflector roll is mostly important consumable accessory in rolling guide, is steel plant bar and wire rod rolling lineOn a very crucial part, domestic Year's consumption more than 1,000,000, international market Year's consumption 800~10,000,000More than part, as the main consumable part on high-speed rod-rolling mill, consumption is very big.
In the wire rod operation of rolling, steel billet is filled with temperature (900~1250 DEG C) and speed higher higher by guide and guardPut.With the development of steel rolling technology, the speed of steel rolling is more and more faster, and the finish to gauge speed of current bar and general section bar is18m/s or so, the finish to gauge speed of wire rod has reached 80m/s~140m/s or so, and the rotating speed of high-speed rod finish to gauge sortie deflector roll is bigIt is about per minute 30000~45000 turns.It is cooling roll and guide and guards, it is necessary to ceaselessly spray certain pressure to its surfaceCooling water.Due to carrying out Roll Collar Forced water cooling, Roll Collar is acted on by chilling and shock heating alternating thermal stress, is also easy to produce heat tiredLabor.Therefore, Roll Collar at relatively high temperatures, should bear rapid heat cycle impact, and sliding frictional wear and steel billet are born againThe shock loading applied during entrance, condition of work is very severe, when the heat spreader of Roll Collar is not smooth, easily causes Roll CollarLoss even fail.Because the condition of work of deflector roll is very badly constantly clashed into, it is necessary to bear rolled piece, under high temperature, high speedRubbed for a long time with rolled piece, while the impact of alternation thermic load is still suffered from, thus the replacement frequency of roll is very high.Therefore, existDuring manufacture deflector roll, it is desirable to high temperature abrasion resistance higher, high rigidity, high tenacity, thermal fatigue resistance high and anti-stick rigidity high.
In the prior art, Roll Collar is mostly using heat resisting steel, the abrasion-resistant stee and height of martensitic structure of austenite structureThe materials such as chrome cast iron, hard alloy, high-alloy steel make deflector roll.Austenitic heat-resistance steel has good high-temperature stability and toughProperty, but wear no resistance, quick abrasion.And austenite and wire rod (being organized as ferrite or austenite) itself adhere to each other tendencyProperty is larger, and steel bonding easily occurs.Martensitic structure abrasion-resistant stee and wear resistant cast iron have good wearability at room temperature, but with makingWith the raising of temperature, martensite is tempered, and wearability can be reduced.Although rich chromium cast iron hardness is high, anti-wear performance is good, due to thisPlant steel hardness and wearability relies primarily on the carbide Cr7C3 and Cr23C6 of chromium, heat endurance is poor, typically more than 450 DEG CStart agglomeration and gradually soften.Hard alloy deflector roll has good wearability and high-temperature stability, but because material is crispProperty it is big, its impact flexibility is relatively low, is easily broken in the case where the high speed (more than 1000m/ s) for being rolled metal head is impacted, excellent heightWarm wearability is difficult to be played, and machinability is poor, and manufacturing cost is too high, is limited in the use of line deflector roll material highSystem.Because metal hardness wearability at high temperature is low, and poor chemical stability under high temperature, therefore used in Roll CollarHigh temperature wear failure, steel bonding failure occur in journey, the originals such as failure, heat fatigue and hot tearing mistake, Cracking Failure, steel bonding failure are pulledBecause of failure, the steel rolling accidents such as stifled steel are then caused to occur.Production maintenance personnel needed for the Roll Collar of above-mentioned material manufacture are more, intensityGreatly, especially Rolling Production efficiency is low, and yield rate is low, and product quality is difficult to ensure.Therefore, its cost how is reduced, it is improvedPerformance, main contents and important problem as future studies.
With the development of high-speed rolling, requirement higher is proposed to guide and guard deflector roll material.Influence guide and guards uses the longevityOne of key issue of life is exactly the control of selection and the structural state of deflector roll material, huge deflector roll material consumption, continuallyChange the normal development that deflector roll has had a strong impact on steel and iron industry.Therefore, the material to deflector roll is studied not only very necessary,And have become expansion iron and steel output, improve one of witch's subject matters to be solved such as section quality.Therefore, domestic and international all oneDirectly it is devoted to the research and development of new deflector roll material.
Steel bonded carbide（Hereinafter referred to as steel-bonded carbide）It is that, with steel as matrix, tungsten carbide, titanium carbide etc. are hard phaseThe high life mould between hard alloy and alloy tool steel, mould steel and high-speed steel produced using powder metallurgy processMaterial and engineering material.The ratio range of steel-bonded carbide steel matrix Binder Phase and hard phase quite it is extensive, this just determines that its hasStandby following excellent properties：1）Extensive processing performance, forgeability and machinable performance and can mainly be heat-treatedProperty and weldability.2）Good physical and mechanical properties, is mainly manifested in the wearability suitable with high-cobalt hart metal；With steel phaseCompare rigidity high, elastic modelling quantity, bending strength and compression strength；The toughness higher compared with hard alloy；And it is goodSelf lubricity and damping characteristic high etc..3）Excellent chemical stability, such as high temperature resistant, anti-oxidant, anti-various dielectric corrosions.Due to the above-mentioned excellent combination property of steel-bonded carbide so that it is in tool die material, wear part, high temperature resistant and corrosion-resistant structureThe aspects such as part material more and more occupy consequence, and in intermetallic composite coating, hardware electronics, automobile, machinery, metallurgy, chemical industry, shipIt is used widely and obtains good result in the field such as oceangoing ship, Aero-Space and nuclear industry.Such as with alloy tool steel, mould steel andHigh-speed steel is compared, and steel-bonded carbide can be such that die life number is increased substantially with ten times of ground, and economic benefit is also extremely notable.
Due to the advantage of the existing hard alloy high elastic modulus of steel bonded carbide, high rigidity and high-wearing feature, there is conjunction againGolden tool steel machinable and the features such as can be heat-treated, significant Technological Economy effect has been obtained for cold-working tool die materialReally.About steel bonded carbide hot working mould applicable cases foreign countries also have been reported that, for example:The country such as U.S. has used steel knotHard alloy makes single groove or double flute roll of hot-rolled ribbed bars, and the Roll Collar as manufacture fast mill;And at meThe report of state's this respect is less.Being applied to manufacture Roll Collar will greatly improve the service life of Roll Collar, and reduction is ledRoller production and use cost are defended, the economic benefit of iron and steel enterprise is improved, while also having great social benefit.
The content of the invention
Good the invention provides a kind of wearability in order to solve defect of the prior art, non-breakable, low cost makesWith the nickel chromium triangle molybdenum base WC40 steel bonded carbide Roll Collar and its manufacture method of long lifespan, to strengthen wearability, the extension of deflector rollThe service life of deflector roll, and reduce the manufacturing cost of deflector roll.
The present invention uses following technical scheme to solve technical problem.
Nickel chromium triangle molybdenum base WC40 steel bonded carbide Roll Collars of the invention, using nickel chromium triangle molybdenum base WC40 steel bonded carbide systemsMake.Processing and manufacturing process includes following steps：
（1）Guide and guard roll material：
Material therefor chemical composition mass percent be C0.6~0.7%, Cr0.8~1.0%, Mo1.7~2.0%, Ni1.7~1.8%, Mn0.5~0.6%, Mn0.6~0.7%, WC40%, balance of Fe；
（2）The manufacture and processing of Roll Collar：
1) the nickel chromium triangle molybdenum base WC40 steel bonded carbide steel bonded carbide that powder metallurgical technique is manufactured is carried out into forging molding；
2) the nickel chromium triangle molybdenum base WC40 steel bonded carbide steel bonded carbide of forging molding is carried out into spheroidizing treatment, makes steel knotCemented Carbide Hardness ＜ HRA74；
3) steel bonded carbide after spheroidizing is processed is processed according to the size needed for Roll Collar product, by Roll CollarCertain stock removal is reserved at physical dimension and endoporus dress dress bearing；
4) the steel bonded carbide Roll Collar that will be processed is quenched and tempering heat treatment, makes its hardness ＞ HRA80；
5) grinding to institute will be carried out by quenching and the good steel bonded carbide Roll Collar appearance of tempering heat treatment and endoporusNeed size；
6) by the good steel bonded carbide Roll Collar of grinding carry out quality inspection it is qualified after in its surface and endoporus oiling, soAfter pack.
Beneficial effect
Compared with the prior art, the present invention has the beneficial effect that：
1st, nickel chromium triangle molybdenum base WC40 steel bonded carbide Roll Collars of the invention, overcome austenitic heat-resistance steel and wear no resistance, abrasionHurry up, the tendency that adheres to each other with wire rod wins larger, steel bonding and martensitic structure abrasion-resistant stee easily occurs and wear resistant cast iron is prone toMartenaging martempering, wearability can be reduced and rich chromium cast iron heat endurance is poor, it is easy to agglomeration and gradually soften and hard closeGolden deflector roll is big due to material fragility, and its impact flexibility is relatively low, is easily broken under HI high impact, and machinability is poor, is manufactured intoThis too high shortcoming and defect.The advantage of existing hard alloy high elastic modulus, high rigidity and high-wearing feature, there is alloy tool againSteel machinable and the advantages of can be heat-treated, with high temperature resistant, the characteristic of abrasion-resistant, greatly increases the wear-resisting of deflector rollThe performances such as property, high temperature resistant, heat shock resistance, extend the service life of deflector roll, and service life is generally the 5~10 of traditional deflector rollTimes, so as to reduce production cost, improve production efficiency and product quality.Greatly reduce the manufacturing cost of deflector roll.HaveGreat economic benefit and social benefit.
2nd, the nickel chromium triangle molybdenum base WC40 steel bonded carbide Roll Collar prepared by the present invention is not only wear-resisting but also overcomes hard alloyBreakable shortcoming, wear-resistant, the excellent physical and mechanical properties such as resistance to high temperature oxidation high with hardness, and manufacture method are easy,It is easily operated, it is with low cost, there is high cost performance.
Brief description of the drawings
Fig. 1 is the sectional view of nickel chromium triangle molybdenum base WC40 steel bonded carbide Roll Collars of the invention.
Label in accompanying drawing 1：1 bearing mounting hole, 2 deflector roll shaft through-holes, 3 guide and guard roll bodies, 4 bearings install limited step.
Below by way of specific embodiment, and the invention will be further described with reference to accompanying drawing.
Specific embodiment
Referring to Fig. 1, nickel chromium triangle molybdenum base WC40 steel bonded carbide Roll Collars, by 1 bearing mounting hole, 2 deflector roll shaft through-holes, 3 leadRoll body is defended, 4 bearings are installed limited step and constituted.
Further illustrated with reference to specific embodiment.Protection scope of the present invention is not only limited to following contentStatement.
Embodiment 1
The processing and manufacturing process of nickel chromium triangle molybdenum base WC40 steel bonded carbide Roll Collars of the invention generally comprises following steps：
（1）Guide and guard roll material：
Material chemical composition mass percent be C0.6%, Cr0.8%, Mo1.7%, Ni1.7%, Mn0.5%, Si0.4, WC40%, it is remainingIt is Fe to measure；
（2）The manufacture and processing of Roll Collar：
1) the nickel chromium triangle molybdenum base WC40 steel bonded carbide that powder metallurgical technique is manufactured is carried out into forging molding；
2) the nickel chromium triangle molybdenum base WC40 steel bonded carbide of forging molding is carried out into spheroidizing treatment, makes steel bonded carbide hardness＜ HRA74；
3) steel bonded carbide after spheroidizing is processed is processed according to the size needed for Roll Collar product, by Roll CollarCertain stock removal is reserved at physical dimension and endoporus dress dress bearing；
4) the steel bonded carbide Roll Collar that will be processed is quenched and tempering heat treatment, makes its hardness ＞ HRA80；
5) grinding to institute will be carried out by quenching and the good steel bonded carbide Roll Collar appearance of tempering heat treatment and endoporusNeed size；
6) by the good steel bonded carbide Roll Collar of grinding carry out quality inspection it is qualified after in its surface and endoporus oiling, soAfter pack.
Instant invention overcomes the deficiency of single material in the prior art, hard alloy wear resistance, common iron are given full play to notBreakable strong point, the two is combined, and produces steel bonded carbide deflector roll.
It is to be understood that above with respect to specific descriptions of the invention, being merely to illustrate the present invention and being not limited to thisTechnical scheme described by inventive embodiments, it will be understood by those within the art that, still the present invention can be carried outModification or equivalent, to reach identical technique effect；As long as satisfaction use needs, all protection scope of the present invention itIt is interior.
Embodiment 2
The processing and manufacturing process of nickel chromium triangle molybdenum base WC40 steel bonded carbide Roll Collars of the invention generally comprises following steps：
（1）Guide and guard roll material：
Material chemical composition mass percent be C0.7%, Cr1.0%, Mo2.0%, Ni1.8%, Mn0.6%, Si0.6%, WC40%,Balance of Fe；
（2）The manufacture and processing of Roll Collar：
1) the nickel chromium triangle molybdenum base WC40 steel bonded carbide that powder metallurgical technique is manufactured is carried out into forging molding；
2) the nickel chromium triangle molybdenum base WC40 steel bonded carbide of forging molding is carried out into spheroidizing treatment, makes steel bonded carbide hardness＜ HRA74；
3) steel bonded carbide after spheroidizing is processed is processed according to the size needed for Roll Collar product, by Roll CollarCertain stock removal is reserved at physical dimension and endoporus dress dress bearing；
4) the steel bonded carbide Roll Collar that will be processed is quenched and tempering heat treatment, makes its hardness ＞ HRA80；
5) grinding to institute will be carried out by quenching and the good steel bonded carbide Roll Collar appearance of tempering heat treatment and endoporusNeed size；
6) by the good steel bonded carbide Roll Collar of grinding carry out quality inspection it is qualified after in its surface and endoporus oiling, soAfter pack.
Instant invention overcomes the deficiency of single material in the prior art, hard alloy wear resistance, common iron are given full play to notBreakable strong point, the two is combined, and produces steel bonded carbide deflector roll.
It is to be understood that above with respect to specific descriptions of the invention, being merely to illustrate the present invention and being not limited to thisTechnical scheme described by inventive embodiments, it will be understood by those within the art that, still the present invention can be carried outModification or equivalent, to reach identical technique effect；As long as satisfaction use needs, all protection scope of the present invention itIt is interior.