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Influence of grain size on mechanical properties of 18Ni maraging steel
Author(s): 
Pages: 59-62
Year: Issue:  1
Journal: MATERIAL SCIENCE AND TECHNOLOGY

Keyword:  马氏体时效钢晶粒度力学性能循环细化;
Abstract: 为解决我国某国防用高精密弹性件材料强韧性不足的问题,研究了不同尺寸对18Ni(1 750 MPa级)马氏体时效钢力学性能的影响.通过循环相变细化奥氏体晶粒到不同尺寸,在相同时效处理规程下进行时效处理,机械性能测试表明,晶粒细化是同时提高18Ni马氏体时效钢强度和塑性的一种有效手段,在晶粒比较粗大时,晶粒细化对强度的贡献不是很大,随着晶粒的进一步细化,晶粒细化对18Ni马氏体时效钢的强度贡献逐渐增加,时效处理对这一影响有放大作用.
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