摘要
XM-25钢为化学成分改进后的一种新型马氏体沉淀硬化不锈钢,该材料作为ASME规范推荐材料。通过对常用材料FV520(B)的主要化学元素,包括铬、镍、铜、铌含量进行优化和重新配比,使得马氏体转变M_(s)点高于室温,固溶化+时效处理后XM-25材料的屈服强度可以达到1175 MPa以上。本文在原有热处理工艺的基础上,通过增加中间处理和深冷处理,得到了使XM-25材料获得更高强度的热处理工艺,为超高强度马氏体沉淀硬化不锈钢的选用提供了工艺方法。
The XM-25 steelis a new type ofmartensitic precipitation hardening stainless steelwith improved chemical composition,which is recommended by ASME code.The M_(s) point of martensite transformation is higher than room temperature by optimization and re-proportioning the main chemical elements of common material FV520(B),including chromium,nickel,copper and niobium.Therefore,the yield strength of XM-25 materials can reach more than 1175 MPa after solid solution and aging heat treatment.Based on the original heat treatment process,by adding intermediate treatment and cryogenic treatment,the heat treatment process for XM-25 material with the higher strength is obtained,which provides a technical method for selecting ultra-high strength precipitation hardening stainless steel.
作者
赵亮
ZHAO Liang(Shenyang Blower Works Group Corporation,Shenyang Liaoning 110869,China)
出处
《热处理技术与装备》
2022年第2期29-32,共4页
Heat Treatment Technology and Equipment
关键词
马氏体沉淀硬化不锈钢
中间处理
深冷处理
组织
性能
martensitic precipitation hardening stainless steel
intermediate treatment
cryogenic treatment
microstructure
mechanical property
