摘要
为进一步提高钢的强度,改造淬火-碳分配(Q-P)工艺,在超高强度钢的成分设计中加入碳化物形成元素Nb或(和)Mo,使在马氏体基体上析出碳化物,提出淬火-碳分配-回火(沉淀)(Q-P-T)工艺。将按设计超高强度钢大致成分的钢进行Q-P-T处理后,得钢的抗拉强度高达>2000MPa,总断后伸长率>10%。和迄今发展的各类含碳小于0.5%钢的综合力学性能相比,Q-P-T钢可能成为优异的超高强度钢。
In order to further raise the strength of steel, Quenching-Partitioning-Tempering （precipitation） process, based upon the Q-P treatment is suggested for ultra-high strength steel with designed composition containing carbide forming element Nb or（and） Mo causing precipitation of complex carbide from martensite matrix. A steel with approximate composition designed for ultra-high strength steel shows ultimate tensile strengh as high as 〉 2000 MPa and total elongation 〉 10% after Q-P-T treatment. Compared with the combind properties of all steels containing 〈0.5%wt% C developed so far, the Q-P-T steel may become the superior ultra-high strength steel.
出处
《热处理》
CAS
2008年第2期1-5,共5页
Heat Treatment
