EFFECT OF HEAT-TREATMENT ON MICROSTRUCTURE AND MECHANICAL-PROPERTIES OF MARTENSITIC FERRITIC STAINLESS-STEEL CONTAINING 17-PERCENT-CR AND 2-PERCENT-NI

被引：0

作者：

LIU, N ^{[1
]}

DENG, ZG ^{[1
]}

HUANG, MG ^{[1
]}

机构：

[1] HEFEI HEAT TREATMENT PLANT,HEFEI,PEOPLES R CHINA

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 1991年 / 7卷 / 11期

关键词：

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of heat treatment on the microstructure and mechanical properties of a 0.16C-17Cr-2Ni (wt-%) stainless steel was studied. Ultrahigh temperature (1200-degrees-C) austenitising did not improve fracture toughness or impact toughness, owing to the presence of many delta-ferrite networks and some twinned martensite in the microstructure. Fine massive delta-ferrite, dislocated martensite laths, and interlath retained austenite were obtained by high temperature (1100-degrees-C) austenitising. This microstructure was found to have a good combined strength and toughness after an appropriate tempering process. Temper embrittlement occurred at 550-degrees-C, with the appearance of typical brittle intergranular fracture. The mechanism of temper embrittlement is considered to be the segregation of phosphorus, chromium, and nickel to prior austenite grain boundaries. The microstructures, fracture surfaces, and impact and fracture toughness values correlate well.

引用

页码：1057 / 1062

页数：6

共 13 条

[1] STRENGTH OF FERROUS MARTENSITE [J].

CHILTON, JM ;

KELLY, PM .

ACTA METALLURGICA, 1968, 16 (05) :637-&

[2] MICROSTRUCTURE-STRENGTH RELATIONS IN A HARDENABLE STAINLESS-STEEL WITH 16 PCT CR, 1.5 PCT MO, AND 5 PCT NI [J].

GROBNER, PJ ;

BISS, V .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1984, 15 (07) :1379-1387

[3] EFFECT OF STEP QUENCHING ON MICROSTRUCTURE AND FRACTURE TOUGHNESS OF AISI 4340 STEEL [J].

KHAN, KH ;

WOOD, WE .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1978, 9 (07) :899-907

[4] EFFECT OF AUSTENITIZING TEMPERATURE ON MICROSTRUCTURE AND MECHANICAL-PROPERTIES OF AS-QUENCHED 4340 STEEL [J].

LAI, GY ;

WOOD, WE ;

CLARK, RA ;

ZACKAY, VF ;

PARKER, ER .

METALLURGICAL TRANSACTIONS, 1974, 5 (07) :1663-1670

[5]

LIU N, 1987, HEAT TREAT MET, P13

[6]

LIU N, 1990, MET SCI TECHNOL, V9, P27

[7]

LIU N, 1990, T MET HEAT TREAT, V11, P36

[8]

MCMAHON JA, 1973, MICROSTRUCTURE DESIG, V1, P180

[9] TEMPER EMBRITTLEMENT OF NI-CR STEELS BY PHOSPHORUS [J].

MULFORD, RA ;

MCMAHON, CJ ;

POPE, DP ;

FENG, HC .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1976, 7 (08) :1183-1195

[10] SUBSTRUCTURE OF PLASTICALLY DEFORMED NICKEL [J].

NOLDER, RL ;

THOMAS, G .

ACTA METALLURGICA, 1964, 12 (02) :227-&

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