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在非真空感应炉中直接使用真空铬冶炼超低碳不锈钢对,由于真空铬含氧量及夹杂物多,而使铜的热塑性明显恶化,又由于真空铬的吸氮性,而使铜中氮量急剧增加,从而导致钢的抗应力腐蚀破裂能力大大下降。为此,我们采取了相应的工艺措施,特别是采用了Ni-Mg合金做强制脱氧剂,改变了真空铬的加入方式,使上述问题得到了解决,使在非真空感应炉中直接使用真空铬冶炼超低碳不锈钢的工艺得到突破。
Vacuum non-vacuum induction furnace directly using vacuum chrome smelting ultra-low carbon stainless steel, due to the oxygen content of vacuum chromium and inclusions and more so that the thermoplastic properties of copper significantly deteriorated, but also because of vacuum nitrogen absorption nitrogen, leaving the copper nitrogen A sharp increase in the amount of steel, which led to the ability of anti-stress corrosion cracking greatly reduced. To this end, we have taken the appropriate technical measures, in particular the use of Ni-Mg alloy as a mandatory deoxidizer, changing the way to add vacuum chromium, so that the above problems have been resolved, so that non-vacuum induction furnace directly using vacuum chromium Smelting ultra-low carbon stainless steel process has been a breakthrough.