Strengthening and toughening of a 2800-MPa grade maraging steel

被引：83
作者：
He, Y [1 ]
Yang, K [1 ]
Qu, WS [1 ]
Kong, FY [1 ]
Su, GY [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
来源：
MATERIALS LETTERS | 2002年 / 56卷 / 05期
关键词：
maraging steel; strengthen; fracture toughness; precipitation hardening;
D O I：
10.1016/S0167-577X(02)00610-9
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A new high Ni, Ti and low Mo maraging steel based on 13Ni(400) maraging steel has been developed. The optimum heat treatment was found to be cryogenic treatment (CT) at 200 K followed by aging treatment at 773 K for 4 h in as-forged or solution condition. Optical and transmission electron microscopy (TEM) revealed that the precipitates, such as Ni-3(Mo, Ti), were well developed in lath martensite. It achieved strength of 2700 MPa and fracture toughness of above 30 MPa m(1/2). The balance among alloy elements and the removal of undissolved coarse particles ensured the good combination of strength and toughness by a normal thermomechanical treatment condition. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：763 / 769
页数：7
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