AGING BEHAVIOR OF COBALT FREE CHROMIUM CONTAINING MARAGING STEELS

被引：39

作者：

GEMPERLE, A ^{[1
]}

GEMPERLOVA, J ^{[1
]}

SHA, W ^{[1
]}

SMITH, GDW ^{[1
]}

机构：

[1] UNIV OXFORD, DEPT MAT, OXFORD, ENGLAND

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 1992年 / 8卷 / 06期

关键词：

D O I：

10.1179/mst.1992.8.6.546

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper reports an investigation of the aging behaviour of two Co free Cr containing maraging steels (Fe-1.0Si-11-2Cr-1.3Mo-9.1Ni-1.2Al-1.0Ti and Fe-0.8Si-17.2Cr-6.1Ni-0.4Al-0.9Ti, all at.-%), using hardness measurements, electron microscopy of replicas and thin foils, atom probe field ion microscopy (APFIM), and thermochemical calculations. Two different families of intermetallic phases (Ti6Si7Ni16G phase and eta-Ni3Ti)have been found to contribute to age hardening. The composition and morphology of these precipitates were studied in deformed and undeformed alloys after aging at 420-570-degrees-C for various times. In addition reverted austenite has been found in the aged structure. Results obtained at APFIM are compared with equilibrium thermodynamic calculations and previous APFIM studies of conventional Cr free low Al and Si maraging steels having higher Mo contents.

引用

页码：546 / 554

页数：9

共 27 条

[1]

BEATTIE HJ, 1957, J MET, V9, P911

[2] THE CRYSTAL STRUCTURE OF THE INTERMETALLIC COMPOUND MG6SI7CU16 [J].