研究了一种高强度马氏体时效不锈钢逆转变奥氏体再结晶规律、细化晶粒工艺及细晶组织对力学性能的影响。研究表明，通过循环相变α′γ可得到7 μm的等轴晶粒，新生晶粒内的板条马氏体块又重新被分割而成为若干个亚晶粒，同时部分单一的马氏体板条束又被夹角略大于60°方向上的若干个小马氏体板条束所分割，从而进一步细化了马氏体组织；与传统热处理工艺1050 ℃×1 h相比，在同样时效处理规程下进行时效处理，钢的屈服强度提高了130 MPa，A、Z分别提高了7.5%、11%，循环相变细化晶粒是同时提高该钢的强度和韧塑性的有效手段。
Reverse austenization,grain refining and effect of grain refined structure on mechanical properties of a high strength maraging stainless steel were studied. The results show that the steel with 7 μm grains was acquired by thermocycle refining treatment, many martensite lath blocks were partitioned into some subgrains, and a few single lathes were partitioned by some martensite lath packets in new refined grains; compared with the steel treated by 1050 ℃×1 h,the yield strength of thermocycle refined steel was increased by 130 MPa,A and Z were increased by 7.5% and 11%,so that thermocycle refining treatment is a new efficient method to improve both strength and toughness of maraging stainless steel.
参考文献
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%