CN101011785A - Cr13 series overlay welding self-protection flux-cored wire - Google Patents

Abstract

Translated fromChinese

Cr13系列堆焊自保护药芯焊丝属于材料加工工程中的焊接领域。现有Cr13系列堆焊材料，存在材料浪费率高、生产效率低，或设备复杂，成本高的问题。本发明提供一种高氟化物Cr13系列堆焊自保护药芯焊丝，特征在于，所述药芯成分质量百分含量范围如下：氟化钙：10～20％；氟化钡：10～20％；碳酸钠：1～2％；金属铬30～40％；铁粉：3～10％；金属锰：3～5％高碳铬铁：0～6％；Al－Mg合金：8～14％；钛酸钾：3～7％；镁砂2～5％。本发明所提供的药芯焊丝在熔敷金属成分及性能满足要求的基础上，具有电弧稳定，挺度好，焊缝成型好，熔渣覆盖好且易于脱渣，焊接过程自保护效果良好等特点。Cr13 series surfacing welding self-shielding flux cored wire belongs to the field of welding in material processing engineering. The existing Cr13 series surfacing materials have the problems of high material waste rate, low production efficiency, complex equipment and high cost. The invention provides a high-fluoride Cr13 series surfacing self-shielding flux-cored welding wire, which is characterized in that the mass percentage range of the flux core components is as follows: calcium fluoride: 10-20%; barium fluoride: 10-20% ;Sodium carbonate: 1~2%; Metal chromium 30~40%; Iron powder: 3~10%; Metal manganese: 3~5% High carbon ferrochrome: 0~6%; Al-Mg alloy: 8~14% ; Potassium titanate: 3-7%; magnesia 2-5%. The flux-cored welding wire provided by the invention has the advantages of stable arc, good stiffness, good weld formation, good slag coverage and easy slag removal, and good self-protection effect in the welding process, etc., on the basis that the deposited metal composition and performance meet the requirements. features.

Description

Translated fromChinese

Cr13系列堆焊自保护药芯焊丝Cr13 series surfacing welding self-shielding flux cored wire

技术领域technical field

本发明属于材料加工工程中的焊接领域，是利用碳钢钢带包裹合金粉末制造熔敷金属为Cr13系列1Cr13和2Cr13型的自保护药芯焊丝。该发明主要应用于工作在耐热、耐腐蚀、抗磨损工作条件下的轴类、阀门类等材料的修复焊接。The invention belongs to the field of welding in material processing engineering, and uses carbon steel strips to wrap alloy powders to manufacture self-shielding flux-cored welding wires whose deposited metals are Cr13 series 1Cr13 and 2Cr13 types. The invention is mainly applied to the repair welding of shafts, valves and other materials working under heat-resistant, corrosion-resistant and wear-resistant working conditions.

背景技术Background technique

近年来，再制造技术得到极大发展和广泛应用，通过堆焊方法对工作在恶劣条件下的大型零件进行修复，恢复其使用性能，延长使用寿命，极大的节约了资源，降低生产成本。Cr13型不锈钢具有良好的耐蚀、耐热和耐磨综合性能，轮轴，耐压容器阀门，水轮机叶片等重要零件生产中具有广泛应用。采用堆焊方法过渡合金元素在这些部件的生产及维修过程中非常普遍。目前Cr13型堆焊焊接材料以焊条为主，工作效率低，材料浪费率高，药芯焊丝的应用主要集中在金属芯或气保护药芯焊丝领域，设备成本及材料成本相对较高，应用场合也有一定限制。在焊接过程中，溶入到焊缝中的氢是诱导裂纹产生的重要因素，并且具有延迟性，很有可能在焊后一两年内的任何时间产生裂纹，十分危险。In recent years, remanufacturing technology has been greatly developed and widely used. Large parts working under harsh conditions can be repaired by surfacing welding methods to restore their performance and prolong their service life, which greatly saves resources and reduces production costs. Cr13 stainless steel has good comprehensive properties of corrosion resistance, heat resistance and wear resistance, and is widely used in the production of important parts such as wheel shafts, pressure vessel valves, and turbine blades. Transitional alloying elements are very common in the production and repair of these components using surfacing methods. At present, Cr13 surfacing welding materials are mainly welding rods, which have low work efficiency and high material waste rate. The application of flux cored wire is mainly concentrated in the field of metal core or gas shielded flux cored wire. The cost of equipment and materials is relatively high. There are also certain restrictions. During the welding process, the hydrogen dissolved in the weld is an important factor to induce cracks, and it has a delay. It is very likely that cracks will occur at any time within one or two years after welding, which is very dangerous.

针对上述情况，开发一种高氟化物碱性渣系自保护药芯焊丝。通过碳钢钢带H08A包裹合金粉末过渡合金元素，通过适当调整含碳量，使熔敷金属达到为1Cr13或2Cr13不锈钢的要求，其特点在于用碳钢带做钢皮，达到Cr13的成分要求；较多的氟化物作为造渣物质，并能达到良好的熔渣覆盖，有效的对合金元素的过渡进行渣保护，控制扩散氢含量，降低使用过程中产生延迟裂纹的可能；特别是材料成本相对较低，应用场合灵活，设备简单，生产效率好，焊接工艺良好，具有很好的市场开发前景。In view of the above situation, a self-shielding flux cored welding wire with high fluoride alkaline slag is developed. The carbon steel strip H08A is used to wrap the alloy powder transitional alloy elements, and by properly adjusting the carbon content, the deposited metal can meet the requirements of 1Cr13 or 2Cr13 stainless steel. It is characterized in that the carbon steel strip is used as the steel skin to meet the composition requirements of Cr13; More fluorides are used as slag-forming substances, and can achieve good slag coverage, effectively slag protection for the transition of alloy elements, control the content of diffusible hydrogen, and reduce the possibility of delayed cracks during use; especially the material cost is relatively Low, flexible application occasions, simple equipment, good production efficiency, good welding technology, and has a good market development prospect.

高氟化物碱性渣系自保护堆焊药芯焊丝的研制在国内外尚未见相关的专利报道。The development of high fluoride alkaline slag-based self-shielded surfacing flux-cored welding wire has not yet been related to patent reports at home and abroad.

发明内容Contents of the invention

本发明所要解决的问题是依靠碳钢带包裹合金粉末制造药芯焊丝，焊接时无须外加气体保护，使熔敷金属达到1Cr13或2Cr13不锈钢的成分要求，硬度指标1Cr13达到HRC≥40，2Cr13达到HRC≥45要求，具有良好的工艺性能，如熔渣覆盖性、脱渣性、电弧稳定性、低飞溅性能。在高氟化物条件下，能够具有良好的抗气孔能力及电弧稳定性。The problem to be solved by the present invention is to rely on the carbon steel strip to wrap the alloy powder to manufacture the flux-cored welding wire. There is no need to add gas protection during welding, so that the deposited metal can meet the composition requirements of 1Cr13 or 2Cr13 stainless steel, and the hardness index 1Cr13 can reach HRC ≥ 40, and 2Cr13 can reach HRC. ≥45 requirements, with good process performance, such as slag coverage, slag removal, arc stability, low spatter performance. Under the condition of high fluoride, it can have good anti-porosity ability and arc stability.

一种高氟化物Cr13系列堆焊自保护药芯焊丝，其特征在于，所述的药芯成分质量百分含量范围如下：A high-fluoride Cr13 series surfacing self-shielding flux-cored wire, characterized in that the mass percentage range of the flux core components is as follows:

氟化钙：10～20％；氟化钡：10～20％；碳酸钠：1～2％；金属铬30～40％；铁粉：3～10％；金属锰：3～5％高碳铬铁：0～6％；Al-Mg合金：8～14％；钛酸钾：3～7％；镁砂2～5％。Calcium fluoride: 10-20%; Barium fluoride: 10-20%; Sodium carbonate: 1-2%; Metal chromium 30-40%; Iron powder: 3-10%; Metal manganese: 3-5% high carbon Ferrochrome: 0-6%; Al-Mg alloy: 8-14%; potassium titanate: 3-7%; magnesia 2-5%.

氟化钙：造渣物质，稀渣剂，有利于降低扩散氢含量。Calcium fluoride: slagging substance, thin slag agent, which is beneficial to reduce the content of diffusible hydrogen.

氟化钡：造渣物质，有利于提高渣熔点，同时支持短弧焊接，改善熔渣覆盖性、脱渣性及焊缝成型。Barium fluoride: a slag-forming substance, which is beneficial to increase the melting point of slag, and supports short-arc welding at the same time, improving slag coverage, slag removal and weld formation.

碳酸钠：造气、造渣、同时具备一定的稳弧作用。Sodium carbonate: produces gas and slag, and has a certain arc stabilizing effect at the same time.

金属铬：向焊缝过渡合金元素。Chromium metal: a transitional alloying element to the weld.

Fe粉：向焊缝过渡金属，改善导电率。Fe powder: transition metal to the weld to improve electrical conductivity.

金属锰：脱氧、脱硫，向焊缝过渡合金元素，脱氧产物进入熔渣。Metal manganese: deoxidation, desulfurization, transition alloy elements to the weld, deoxidation products enter the slag.

高碳铬铁：向焊缝过渡合金元素，调整熔敷金属碳含量。质量百分含量为0～3％时，熔敷金属满足1Cr13成分要求；质量百分含量为3～6％时，熔敷金属成分满足2Cr13成分要求。High-carbon ferrochrome: Transition alloying elements to the weld and adjust the carbon content of the deposited metal. When the mass percentage is 0-3%, the deposited metal meets the composition requirement of 1Cr13; when the mass percentage is 3-6%, the composition of the deposited metal meets the composition requirement of 2Cr13.

Al-Mg合金粉：主要作用是脱氧、定氮，保护铬等有益合金元素的过渡。脱氧后生成的Al₂O₃、MgO具有造渣作用。Al-Mg alloy powder: the main function is to deoxidize, fix nitrogen, and protect the transition of beneficial alloy elements such as chromium. Al₂ O₃ and MgO produced after deoxidation have slagging effect.

钛酸钾：主要作用是细化熔滴，降低飞溅。Potassium titanate: the main function is to refine the droplet and reduce the splash.

镁砂：高熔点物质有利于调整熔渣的熔点，改善熔渣覆盖性。Magnesia: High melting point substances are beneficial to adjust the melting point of slag and improve the coverage of slag.

本发明所提供的药芯焊丝具有电弧稳定，挺度好，焊缝成型好，熔渣覆盖好且易于脱渣，焊接过程自保护效果良好等特点。此焊丝主要用于承载轴类、阀门类、水轮机叶片等部件的表面堆焊、补焊及修复，具有一定的耐热、耐腐蚀、抗磨损性能。The flux-cored welding wire provided by the invention has the characteristics of stable arc, good stiffness, well-formed weld seam, good slag coverage, easy slag removal, good self-protection effect during welding, and the like. This welding wire is mainly used for surface surfacing, repair welding and repair of bearing shafts, valves, turbine blades and other components, and has certain heat resistance, corrosion resistance and wear resistance.

本发明的制备方法采用现有技术，包括以下步骤：The preparation method of the present invention adopts prior art, comprises the following steps:

1、将钢带轧成U形，向U形槽中加入占本发明焊丝总重的20～30％的本发明药粉；1, steel strip is rolled into U shape, adds the powder of the present invention that accounts for 20～30% of welding wire gross weight of the present invention in U-shaped groove;

2、将U形槽合口，使药粉包裹其中，通过拉丝模，逐道拉拔、减径，最后使其直径达到2.0mm，得到最终产品。2. Close the U-shaped groove, wrap the medicine powder in it, pass through the wire drawing die, draw and reduce the diameter one by one, and finally make the diameter reach 2.0mm to obtain the final product.

具体实施方式：Detailed ways:

所有实施例焊丝都是采用昆明重机厂生产的“FCWM50被动拉拔式药芯焊丝机”制造。选用宽度为10～14mm，厚度为0.3～0.4mm的H08碳钢钢带。先将其轧制成U形，再向U形槽中加入粒度为过40～80目的混合药粉，加粉系数(药粉重量占焊丝总重的百分率)为20～30％。然后将U形槽合口，使药粉包裹其中。具体实施方案如下：All welding wires in the examples are made by "FCWM50 passive drawing type flux-cored welding machine" produced by Kunming Heavy Machinery Factory. H08 carbon steel strips with a width of 10-14mm and a thickness of 0.3-0.4mm are selected. Roll it into a U-shape first, then add mixed medicinal powder with a particle size of over 40-80 mesh into the U-shaped groove, and the powder addition coefficient (the percentage of the weight of the medicinal powder in the total weight of the welding wire) is 20-30%. Then close the U-shaped groove so that the medicinal powder is wrapped therein. The specific implementation plan is as follows:

实施例1：选用14×0.3(宽度为14mm，厚度为0.3mm)的H08碳钢钢带。先将其轧制成U形。将氟化钙粉末10克、氟化钡粉末20克，碳酸钠粉末1克、金属铬粉末30克、铁粉8克、金属锰粉末5克、高碳铬铁粉末3克、铝镁合金粉末14克、钛酸钾粉末7克、镁砂粉末2克(所取粉末均通过60目分样筛)混合。在混粉机中充分混合均匀，加入U形槽中，使加粉系数为30％。将U形槽合口，使药粉包裹其中。然后使其分别通过直径为：4.2mm、3.6mm、3.3mm、3.15mm、2.95mm、2.7mm、2.5mm、2.3mm、2.1mm、1.96mm的拉丝模，逐道拉拔、减径，最后使其直径达到2.0mm。在无保护气体条件下焊接，堆焊四层，焊接电流为250～350A，焊接电压26～30V，焊接速度为0.5m/min，层间温度控制150～300℃。焊后检查气孔、裂纹、测定脱渣率、堆焊层熔敷金属硬度及相对耐磨性，见表1。Embodiment 1: Select 14×0.3 (14 mm in width and 0.3 mm in thickness) H08 carbon steel strip. Roll it into a U shape first. 10 grams of calcium fluoride powder, 20 grams of barium fluoride powder, 1 gram of sodium carbonate powder, 30 grams of metal chromium powder, 8 grams of iron powder, 5 grams of metal manganese powder, 3 grams of high-carbon ferrochromium powder, aluminum-magnesium alloy powder 14 grams, 7 grams of potassium titanate powder, and 2 grams of magnesia powder (the powders all passed through a 60-mesh sieve) were mixed. Fully mix in the powder mixer, add to the U-shaped tank, so that the powder addition coefficient is 30%. Close the U-shaped groove so that the powder is wrapped in it. Then make it pass through the drawing dies with diameters of 4.2mm, 3.6mm, 3.3mm, 3.15mm, 2.95mm, 2.7mm, 2.5mm, 2.3mm, 2.1mm, 1.96mm, drawing and reducing the diameter one by one, and finally Make it 2.0mm in diameter. Welding without protective gas, surfacing four layers, welding current 250-350A, welding voltage 26-30V, welding speed 0.5m/min, interlayer temperature control 150-300℃. After welding, check the pores and cracks, measure the slag removal rate, the hardness and relative wear resistance of the deposited metal in the surfacing layer, see Table 1.

实施例2：选用14×0.4(宽度为14mm，厚度为0.4mm)的H08碳钢钢带。先将其轧制成U形。将氟化钙粉末15克、氟化钡粉末15克、碳酸钠粉末2克、金属铬粉末35克、铁粉5克、金属锰粉末4克、高碳铬铁粉末6克、铝镁合金粉末8克、钛酸钾粉末5克、镁砂粉末5克(所取粉末均通过80目分样筛)混合。在混粉机中充分混合均匀，加入U形槽中，使加粉系数为20％。将U形槽合口，使药粉包裹其中。然后使其分别通过直径为：4.2mm、3.6mm、3.3mm、3.15mm、2.95mm、2.7mm、2.5mm、2.3mm、2.1mm、1.96mm的拉丝模，逐道拉拔、减径，最后使其直径达到2.0mm。在无保护气体条件下焊接，焊接电流为250～350A，焊接电压26～30V，焊接速度为0.5m/min，层间温度控制150～300℃。焊后检查气孔、裂纹、测定脱渣率、堆焊层熔敷金属硬度及相对耐磨性，见表1。Embodiment 2: H08 carbon steel strip of 14×0.4 (width 14mm, thickness 0.4mm) is selected. Roll it into a U shape first. 15 grams of calcium fluoride powder, 15 grams of barium fluoride powder, 2 grams of sodium carbonate powder, 35 grams of metal chromium powder, 5 grams of iron powder, 4 grams of metal manganese powder, 6 grams of high-carbon ferrochromium powder, aluminum-magnesium alloy powder 8 grams, 5 grams of potassium titanate powder, and 5 grams of magnesia powder (the powders all passed through an 80-mesh sieve) were mixed. Fully mix in the powder mixer, add to the U-shaped tank, so that the powder addition coefficient is 20%. Close the U-shaped groove so that the powder is wrapped in it. Then make it pass through the drawing dies with diameters of 4.2mm, 3.6mm, 3.3mm, 3.15mm, 2.95mm, 2.7mm, 2.5mm, 2.3mm, 2.1mm, 1.96mm, drawing and reducing the diameter one by one, and finally Make it 2.0mm in diameter. Welding without protective gas, the welding current is 250-350A, the welding voltage is 26-30V, the welding speed is 0.5m/min, and the interlayer temperature is controlled at 150-300°C. After welding, check the pores and cracks, measure the slag removal rate, the hardness and relative wear resistance of the deposited metal in the surfacing layer, see Table 1.

实施例3：选用10×0.3(宽度为10mm，厚度为0.3mm)的H08碳钢钢带。先将其轧制成U形。将氟化钙粉末10克、氟化钡粉末20克，碳酸钠粉末1.5克、金属铬粉末40克、铁粉3克、金属锰粉末4克、高碳铬铁粉末4.5克、铝镁合金粉末10克、钛酸钾粉末4克、镁砂粉末3克(所取粉末均通过80目分样筛)混合。在混粉机中充分混合均匀，加入U形槽中，使加粉系数为25％。将U形槽合口，使药粉包裹其中。然后使其分别通过直径为：2.8mm、2.6mm、2.4mm、2.25mm、2.1mm、1.96mm的拉丝模，逐道拉拔、减径，最后使其直径达到2.0mm。在无保护气体条件下焊接，焊接电流为250～350A，焊接电压26～30V，焊接速度为0.5m/min，层间温度控制150～300℃。焊后检查气孔、裂纹、测定脱渣率、堆焊层熔敷金属硬度及相对耐磨性，见表1。Embodiment 3: H08 carbon steel strips of 10×0.3 (width 10 mm, thickness 0.3 mm) are selected. Roll it into a U shape first. 10 grams of calcium fluoride powder, 20 grams of barium fluoride powder, 1.5 grams of sodium carbonate powder, 40 grams of metal chromium powder, 3 grams of iron powder, 4 grams of metal manganese powder, 4.5 grams of high-carbon ferrochrome powder, aluminum-magnesium alloy powder 10 grams, 4 grams of potassium titanate powder, and 3 grams of magnesia powder (the powders all passed through a 80-mesh sieve) were mixed. Fully mix evenly in the powder mixer, add to the U-shaped tank, so that the powder addition coefficient is 25%. Close the U-shaped groove so that the powder is wrapped in it. Then make it pass through drawing dies with diameters of 2.8mm, 2.6mm, 2.4mm, 2.25mm, 2.1mm, and 1.96mm, draw and reduce the diameter one by one, and finally make the diameter reach 2.0mm. Welding without protective gas, the welding current is 250-350A, the welding voltage is 26-30V, the welding speed is 0.5m/min, and the interlayer temperature is controlled at 150-300°C. After welding, check the pores and cracks, measure the slag removal rate, the hardness and relative wear resistance of the deposited metal in the surfacing layer, see Table 1.

实施例4：选用14×0.3(宽度为14mm，厚度为0.3mm)的H08碳钢钢带。先将其轧制成U形。将氟化钙粉末10克、氟化钡粉末20克，碳酸钠粉末1克、金属铬粉末30克、铁粉8克、金属锰粉末5克、高碳铬铁粉末3克、铝镁合金粉末14克、钛酸钾粉末7克、镁砂粉末2克(所取粉末均通过60目分样筛)混合。在混粉机中充分混合均匀，加入U形槽中，使加粉系数为30％。将U形槽合口，使药粉包裹其中。然后使其分别通过直径为：4.2mm、3.6mm、3.3mm、3.15mm、2.95mm、2.7mm、2.5mm、2.3mm、2.1mm、1.96mm的拉丝模，逐道拉拔、减径，最后使其直径达到2.0mm。在无保护气体条件下焊接，堆焊四层，焊接电流为250～350A，焊接电压26～30V，焊接速度为0.5m/min，层间温度控制150～300℃。焊后检查气孔、裂纹、测定脱渣率、堆焊层熔敷金属硬度及相对耐磨性，见表1。Embodiment 4: A 14×0.3 (14 mm in width and 0.3 mm in thickness) H08 carbon steel strip is selected. Roll it into a U shape first. 10 grams of calcium fluoride powder, 20 grams of barium fluoride powder, 1 gram of sodium carbonate powder, 30 grams of metal chromium powder, 8 grams of iron powder, 5 grams of metal manganese powder, 3 grams of high-carbon ferrochromium powder, aluminum-magnesium alloy powder 14 grams, 7 grams of potassium titanate powder, and 2 grams of magnesia powder (the powders all passed through a 60-mesh sieve) were mixed. Fully mix in the powder mixer, add to the U-shaped tank, so that the powder addition coefficient is 30%. Close the U-shaped groove so that the powder is wrapped in it. Then make it pass through the drawing dies with diameters of 4.2mm, 3.6mm, 3.3mm, 3.15mm, 2.95mm, 2.7mm, 2.5mm, 2.3mm, 2.1mm, 1.96mm, drawing and reducing the diameter one by one, and finally Make it 2.0mm in diameter. Welding without protective gas, surfacing four layers, welding current 250-350A, welding voltage 26-30V, welding speed 0.5m/min, interlayer temperature control 150-300℃. After welding, check the pores and cracks, measure the slag removal rate, the hardness and relative wear resistance of the deposited metal in the surfacing layer, see Table 1.

实施例5：选用14×0.4(宽度为14mm，厚度为0.4mm)的H08碳钢钢带。先将其轧制成U形。将氟化钙粉末15克、氟化钡粉末15克、碳酸钠粉末2克、金属铬粉末36克、铁粉9克、金属锰粉末4克、高碳铬铁粉末0克、铝镁合金粉末8克、钛酸钾粉末6克、镁砂粉末5克(所取粉末均通过80目分样筛)混合。在混粉机中充分混合均匀，加入U形槽中，使加粉系数为20％。将U形槽合口，使药粉包裹其中。然后使其分别通过直径为：4.2mm、3.6mm、3.3mm、3.15mm、2.95mm、2.7mm、2.5mm、2.3mm、2.1mm、1.96mm的拉丝模，逐道拉拔、减径，最后使其直径达到2.0mm。在无保护气体条件下焊接，焊接电流为250～350A，焊接电压26～30V，焊接速度为0.5m/min，层间温度控制150～300℃。焊后检查气孔、裂纹、测定脱渣率、堆焊层熔敷金属硬度及相对耐磨性，见表1。Embodiment 5: A 14×0.4 (14 mm in width and 0.4 mm in thickness) H08 carbon steel strip is selected. Roll it into a U shape first. 15 grams of calcium fluoride powder, 15 grams of barium fluoride powder, 2 grams of sodium carbonate powder, 36 grams of metal chromium powder, 9 grams of iron powder, 4 grams of metal manganese powder, 0 grams of high-carbon ferrochrome powder, and aluminum-magnesium alloy powder 8 grams, 6 grams of potassium titanate powder, and 5 grams of magnesia powder (the powders all passed through a 80-mesh sieve) were mixed. Fully mix in the powder mixer, add to the U-shaped tank, so that the powder addition coefficient is 20%. Close the U-shaped groove so that the powder is wrapped in it. Then make it pass through the drawing dies with diameters of 4.2mm, 3.6mm, 3.3mm, 3.15mm, 2.95mm, 2.7mm, 2.5mm, 2.3mm, 2.1mm, 1.96mm, drawing and reducing the diameter one by one, and finally Make it 2.0mm in diameter. Welding without protective gas, the welding current is 250-350A, the welding voltage is 26-30V, the welding speed is 0.5m/min, and the interlayer temperature is controlled at 150-300°C. After welding, check the pores and cracks, measure the slag removal rate, the hardness and relative wear resistance of the deposited metal in the surfacing layer, see Table 1.

实施例6：选用10×0.3(宽度为10mm，厚度为0.3mm)的H08碳钢钢带。先将其轧制成U形。将氟化钙粉末10克、氟化钡粉末20克，碳酸钠粉末1.5克、金属铬粉末40克、铁粉3克、金属锰粉末4克、高碳铬铁粉末1.5克、铝镁合金粉末12克、钛酸钾粉末5克、镁砂粉末3克(所取粉末均通过80目分样筛)混合。在混粉机中充分混合均匀，加入U形槽中，使加粉系数为25％。将U形槽合口，使药粉包裹其中。然后使其分别通过直径为：2.8mm、2.6mm、2.4mm、2.25mm、2.1mm、1.96mm的拉丝模，逐道拉拔、减径，最后使其直径达到2.0mm。在无保护气体条件下焊接，焊接电流为250～350A，焊接电压26～30V，焊接速度为0.5m/min，层间温度控制150～300℃。焊后检查气孔、裂纹、测定脱渣率、堆焊层熔敷金属硬度及相对耐磨性，见表1。Embodiment 6: A 10×0.3 (10 mm in width and 0.3 mm in thickness) H08 carbon steel strip is selected. Roll it into a U shape first. 10 grams of calcium fluoride powder, 20 grams of barium fluoride powder, 1.5 grams of sodium carbonate powder, 40 grams of metal chromium powder, 3 grams of iron powder, 4 grams of metal manganese powder, 1.5 grams of high-carbon ferrochromium powder, aluminum-magnesium alloy powder 12 grams, 5 grams of potassium titanate powder, and 3 grams of magnesia powder (the powders all passed through an 80-mesh sieve) were mixed. Fully mix evenly in the powder mixer, add to the U-shaped tank, so that the powder addition coefficient is 25%. Close the U-shaped groove so that the powder is wrapped in it. Then make it pass through drawing dies with diameters of 2.8mm, 2.6mm, 2.4mm, 2.25mm, 2.1mm, and 1.96mm, draw and reduce the diameter one by one, and finally make the diameter reach 2.0mm. Welding without protective gas, the welding current is 250-350A, the welding voltage is 26-30V, the welding speed is 0.5m/min, and the interlayer temperature is controlled at 150-300°C. After welding, check the pores and cracks, measure the slag removal rate, the hardness and relative wear resistance of the deposited metal in the surfacing layer, see Table 1.

脱渣率的测定采用45⁰V型坡口内堆焊的落锤法试验，试板开V型坡口，钢球重3Kg，平板堆焊时，从背面锤击焊道正对位置。坡口内焊接时，试验架高度调至1000mm，堆焊后立即用钢球砸击焊道背面，砸击5次。脱渣率按式(1)计算。脱渣率见表1。The determination of the slag removal rate adopts the drop hammer test of surfacing welding in⁴⁵⁰ V-shaped grooves. The test plate is opened with V-shaped grooves, and the steel ball weighs 3Kg. When welding inside the groove, the height of the test frame is adjusted to 1000mm. Immediately after the surfacing welding, the steel ball is used to hit the back of the weld bead for 5 times. The slag removal rate is calculated according to formula (1). The slag removal rate is shown in Table 1.

$\mathrm{<span><span>D</span>D.</span>}<span><span>=</span>=</span>\frac{\mathrm{<span><span>L</span>L</span>}<span><span>-</span>-</span><span><span>(</span>(</span>{\mathrm{<span><span>L</span>L</span>}}_{\mathrm{<span><span>0</span>0</span>}}<span><span>+</span>+</span>{\mathrm{<span><span>0.5</span>0.5</span>}\mathrm{<span><span>L</span>L</span>}}_{\mathrm{<span><span>1</span>1</span>}}<span><span>+</span>+</span>{\mathrm{<span><span>0.2</span>0.2</span>}\mathrm{<span><span>L</span>L</span>}}_{\mathrm{<span><span>2</span>2</span>}}<span><span>)</span>)</span>}{\mathrm{<span><span>L</span>L</span>}}<span><span>\&times;</span>\&times;</span>\mathrm{<span><span>100</span>100</span>}<span><span>\%</span>\%</span><span><span>-</span>-</span><span><span>-</span>-</span><span><span>-</span>-</span><span><span>(</span>(</span>\mathrm{<span><span>1</span>1</span>}<span><span>)</span>)</span>$

式中：D——脱渣率(％)；In the formula: D - slag removal rate (%);

L——焊道总长度(mm)；L——total length of weld bead (mm);

L₀——未脱渣长度(mm)；L₀ ——length without slag removal (mm);

L₁——严重粘渣长度(mm)；L₁ —— length of severe sticky residue (mm);

L₂——轻微粘渣长度(mm)L₂ ——Length of slightly sticky residue (mm)

表1所打硬度采用HR-150A洛氏硬度机，载荷为150kg，对每一堆焊层取六点打硬度，最后得到该焊丝堆焊层的平均洛氏硬度值。The hardness in Table 1 adopts HR-150A Rockwell hardness machine with a load of 150kg, and takes six hardness points for each surfacing layer, and finally obtains the average Rockwell hardness value of the welding wire surfacing layer.

表1实施例效果Table 1 embodiment effect

Claims (1)

Translated fromChinese

1、一种Cr13系列堆焊自保护药芯焊丝，其特征在于，所述的药芯成分质量百分含量范围如下：1. A Cr13 series surfacing welding self-shielding flux cored wire, characterized in that the mass percentage range of the flux core components is as follows:氟化钙：10～20％；氟化钡：10～20％；碳酸钠：1～2％；金属铬30～40％；铁粉：3～10％；金属锰：3～5％高碳铬铁：0～6％；Al-Mg合金：8～14％；钛酸钾：3～7％；镁砂2～5％。Calcium fluoride: 10-20%; Barium fluoride: 10-20%; Sodium carbonate: 1-2%; Metal chromium 30-40%; Iron powder: 3-10%; Metal manganese: 3-5% high carbon Ferrochrome: 0-6%; Al-Mg alloy: 8-14%; potassium titanate: 3-7%; magnesia 2-5%.