• CN:11-2187/TH
  • ISSN:0577-6686

›› 2001, Vol. 37 ›› Issue (3): 78-80.

• 论文 • 上一篇    下一篇

一种高锰奥氏体低温钢的力学性能

付瑞东;任伊宾;郑炀曾;刘向左;管秀发   

  1. 燕山大学材料科学与工程学院;沈阳重型机械厂
  • 发布日期:2001-03-15

MECHANICAL PROPERTIES OF A HIGH MANGANESE AUSTENITIC CRYOGENIC STEEL

Fu Ruidong;Ren Yibin;Zheng Yangzeng;Liu Xiangzuo;Guan Xiufa   

  1. Yanshan University Shenyang Heavy Machinery Plant
  • Published:2001-03-15

摘要: 测定了一种高锰奥氏体低温钢从室温到77K温度的拉伸和冲击性能以及77K温度下的断裂韧度,并观察了其断口形貌特征。结果表明试验钢屈服强度与温度的关系为σ0.2=300+1392.4exp(-0.0106T);77K的σ0.2=883MPa,K(J0.05)约为232MPa·m(1/2);低温沿晶断裂被完全抑制,77K的断口表现为以韧窝为主并混有少量准确小刻面的特征。X射线相分析表明该钢具有很高的组织稳定性,77K温度变形前后均为单相奥氏体组织。

关键词: 低温性能, 高锰奥氏体钢

Abstract: The tensile, impacting, fracture toughness properties and the fracture surface of a high manganese austenitic steel are investigates from ambient temperature to 77 K. The results show that the relation between yield strength and temperature isσ0.2=300+1392.4exp(-0.0106T). The 77K yield strength is 883 MPa, and the Kj0.05 value is about 232 MPa?m1/2. The cryogenic intergranular fracture is fully restricted. The 77K fracture surfaces exhibit a tough character composed of a huge quantitative of dimples and a little small qusi-cleavage facets. The results of X-Ray analysis show that the austenite of the steel is stable even under cryogenic deformation conditions.

Key words: Cryogenic property, High manganese austenitic steel

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