30Mn23Al4Cr5超低温无磁钢的研究

金属学报

1983, Vol. 19

Issue (4): 10-142

论文

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30Mn23Al4Cr5超低温无磁钢的研究

张彦生

中国科学院金属研究所

A STUDY ON A CRYOGENIC AND NON-MAGNETIC AUSTENITIC STEEL 30Mn23A14Cr5

by ZHANG Yansheng (Institute of Metal Research; Academia Sinica; Shenyang) (Manuscript received 29 December; 1982)

引用本文:

张彦生. 30Mn23Al4Cr5超低温无磁钢的研究[J]. 金属学报, 1983, 19(4): 10-142.
. A STUDY ON A CRYOGENIC AND NON-MAGNETIC AUSTENITIC STEEL 30Mn23A14Cr5[J]. Acta Metall Sin, 1983, 19(4): 10-142.

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摘要: 研究了尚未受人注意的Fe-Mn-Al-Cr系奥氏体钢,并从中发展出一种新超低温无磁钢30Mn23Al4Cr5。实验结果说明30Mn23Al4Cr5具有较好的综合性能:自室温至-269℃有适宜的强度与很高的韧性,-253℃时V形缺口冲击值为2048 kJ/m~2;低温奥氏体稳定,在-269℃拉伸,形变10％未发现α′马氏体,形变50％未发现ε马氏体;磁导率较低(μ=1.005),电阻率较高(ρ=1.08);冷收缩率很小,甚至低于铁素体的9％Ni钢;高温时效变脆倾向小于一般铬镍奥氏体钢;抗大气腐蚀性能优于9％Ni钢及15Mn26Al4,与ICr13不锈钢相仿。由上述结果分析30Mn23Al4Cr5可能成为一种适用温度范围较广的低温无磁钢,作为低温钢可用于-150--269℃,作为无磁钢可用于600--269℃。

Abstract：An attempt was made to develop an austcnitic cryogenic and non-magnetic steel 30Mn23Al4Cr5 with desirable combination of superior properties. Results of experiments indicated that the steel 30Mn23A14Cr5 is possessed of satisfactory strength and excellent toughness from room temperature to -269℃, i. c. V-notched impact toughness equal to 2048 kJ/m~2 at -269℃. Its low temperature austenite is quite stable, no α'-or ε-martensite was observed under tensile test at -269℃. after 10 or 50％ deformed respectively.Furthermore, other properties were also determined as: low magnetic permeability about 1.005, high resistivity up to 1.08, lower cold constraction and higher resistance to atmospheric corrosion than ferrite 9％Ni steel, and less aging embrittlement than conventional Cr-Ni austcnitic steels. Thus, the proposal can be made that the steel 30Mn23Al4Cr5 is indeed applicable to such uses as a cryogenic steel from -150 to -269℃ and a non-magnetic steel from 600 to -269℃.

收稿日期: 1983-04-18

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