冶炼方法和热处理工艺对0Cr12Mn5Ni4Mo3Al高强不锈钢带力学性能和组织的影响

Effect of Melting Route and Heat Treatment on Mechanical Properties and Structure of 0Cr12Mn5Ni4Mo3Al Strips

研究了热处理对采用电炉＋炉外精炼（LF）＋电渣重熔冶炼的工业用和实验室50妇真空感应炉＋电渣重熔冶炼的试验用0Crl2Mn5Ni4Mo3Al高强度不锈钢带（0．8mm和0．5mm）的力学性能和组织的影响。结果表明，实验室得到的钢材更为洁净，组织中保留有合理的残余奥氏体含量；与采用同样热处理制度的工业钢带相比，在保持或提高伸长率的同时，抗拉强度提高50-85MPa，杯突值提高1～3mm；适当调节Cr、Ni的当量比以及采用合理的锻造、轧制工艺可以消除钢带组织中δ-铁素体的不利影响，更大限度发挥材料潜力。

0Crl2MnSNi4Mo3Al stainless steel strips, 0.5 mm and 0.8 mm in thickness, made from ingots prepared by EAF＋LF＋ESR and laboratory 50 kg VIM＋ ESR were studied. The results show that lab-strips were cleaner and had appropriate residual austenite. Compared with industrial strips, tensile strength and cupping values of lab- strips were higher by 50-85 MPa and 1-3 mm respectively with same elongation. The proper Crq/Niq ratio and forging, rolling technology could give better structure with less influence of δ-ferrite.