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我国电站、石油、化肥等部门中,500℃以下高压阀门的密封面,绝大部分系采用1Cr13,2Cr13或3Cr13焊条堆焊,这类焊条堆焊金属的硬度比较高,1Cr13焊后HRc45以上,2Cr13焊后HRc50以上,3Cr13焊后硬度更高,焊后组织为马氏体,焊后切削加工困难,通常加工前要高温退火处理,切削加工后要进行淬火处理,这样既增加生产工序,延长生产周期,又使生产成本增高。另外生产这种焊条用的合金钢焊芯拔丝
China’s power plants, oil, fertilizers and other departments, the sealing surface of high pressure valves below 500 ℃, the vast majority of the use of 1Cr13, 2Cr13 or 3Cr13 electrode surfacing, such electrode surfacing the hardness of the metal is relatively high, 1Cr13 welding HRc45 above, 2Cr13 welding HRc50 above, 3Cr13 higher hardness after welding, after welding the organization of martensite, after welding cutting difficult, usually high temperature annealing before processing, after cutting to be quenched, so that both increase the production process and extend Production cycle, but also to increase production costs. In addition to the production of such electrodes with alloy steel wire core wire drawing