Effect of Intercritical Quenching on the Microstructure and Cryogenic Mechanical Properties of a 7 Pct Ni Steel

IMR OpenIR

	Effect of Intercritical Quenching on the Microstructure and Cryogenic Mechanical Properties of a 7 Pct Ni Steel
	Cao, Hongwei; Luo, Xinghong; Zhan, Guofeng; Liu, Shi; Luo, XH (reprint author), Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
	2017-09-01
发表期刊	SPRINGER
ISSN	1073-5623
卷号	48A 期号:9 页码:4403-4410
摘要	The effects of variation in the intercritical quench temperature of quench, intercritical quench, and temper (QLT) heat treatments on the microstructure and cryogenic mechanical properties of a 7 pct Ni steel are presented. The intercritical temperatures were in the range of 923 K to 983 K (650 A degrees C to 710 A degrees C) and were followed by quenching. The microstructures as determined by optical microscope, scanning electron microscope, and transmission electron microscopy, and X-ray diffraction are presented, and the results of low-temperature mechanical property tests are given. It is shown that both the grain size and the martensite lath width increased as the intercritical quench temperature increased, while the measured amount of reversed austenite decreased with increasing temperature. Higher amounts of stabilizing elements, such as Ni and Mn, which can improve the stability of reversed austenite, were absorbed by intercritical quenching from 963 K and 983 K (690 A degrees C and 710 A degrees C) than from 923 K and 943 K (650 A degrees C and 670 A degrees C). Both the stability and the amount of reversed austenite had critical effects on the cryogenic mechanical properties of the steel. An excellent combination of cryogenic strength and toughness was achieved by intercritical quenching from 963 K (690 A degrees C), indicating that based on the cryogenic mechanical properties, 7 pct Ni-QLT steel could be used in place of 9 pct Ni steel for liquefied natural gas projects.; The effects of variation in the intercritical quench temperature of quench, intercritical quench, and temper (QLT) heat treatments on the microstructure and cryogenic mechanical properties of a 7 pct Ni steel are presented. The intercritical temperatures were in the range of 923 K to 983 K (650 A degrees C to 710 A degrees C) and were followed by quenching. The microstructures as determined by optical microscope, scanning electron microscope, and transmission electron microscopy, and X-ray diffraction are presented, and the results of low-temperature mechanical property tests are given. It is shown that both the grain size and the martensite lath width increased as the intercritical quench temperature increased, while the measured amount of reversed austenite decreased with increasing temperature. Higher amounts of stabilizing elements, such as Ni and Mn, which can improve the stability of reversed austenite, were absorbed by intercritical quenching from 963 K and 983 K (690 A degrees C and 710 A degrees C) than from 923 K and 943 K (650 A degrees C and 670 A degrees C). Both the stability and the amount of reversed austenite had critical effects on the cryogenic mechanical properties of the steel. An excellent combination of cryogenic strength and toughness was achieved by intercritical quenching from 963 K (690 A degrees C), indicating that based on the cryogenic mechanical properties, 7 pct Ni-QLT steel could be used in place of 9 pct Ni steel for liquefied natural gas projects.
部门归属	[cao, hongwei] univ sci & technol china, dept mat sci & engn, 96 jinzhai rd, hefei 230026, anhui, peoples r china ; [cao, hongwei ; luo, xinghong ; liu, shi] chinese acad sci, inst met res, cas key lab nucl mat & safety assessment, 72 wenhua rd, shenyang 110016, liaoning, peoples r china ; [zhan, guofeng] wuhan iron & steel grp corp, res & dev ctr, 28 yejin rd, wuhan 430080, hubei, peoples r china
学科领域	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者	WISCO
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/79133
专题	中国科学院金属研究所
通讯作者	Luo, XH (reprint author), Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式 GB/T 7714	Cao, Hongwei,Luo, Xinghong,Zhan, Guofeng,et al. Effect of Intercritical Quenching on the Microstructure and Cryogenic Mechanical Properties of a 7 Pct Ni Steel[J]. SPRINGER,2017,48A(9):4403-4410.
APA	Cao, Hongwei,Luo, Xinghong,Zhan, Guofeng,Liu, Shi,&Luo, XH .(2017).Effect of Intercritical Quenching on the Microstructure and Cryogenic Mechanical Properties of a 7 Pct Ni Steel.SPRINGER,48A(9),4403-4410.
MLA	Cao, Hongwei,et al."Effect of Intercritical Quenching on the Microstructure and Cryogenic Mechanical Properties of a 7 Pct Ni Steel".SPRINGER 48A.9(2017):4403-4410.