Microstructure and mechanical property of austenitic steel Cr18Ni3Mn11Cu3NbN

被引：0

作者：

Li D. ^{[1
]}

Cheng X. ^{[1
]}

Yao C. ^{[2
]}

Li D. ^{[1
]}

Dai Q. ^{[1
]}

Chen Z. ^{[1
]}

机构：

[1] School of Material Science and Engineering, Jiangsu University, Zhenjiang

[2] Institute for Structural Materials, Central Iron and Steel Research Institute

来源：

Jiangsu Daxue Xuebao (Ziran Kexue Ban)/Journal of Jiangsu University (Natural Science Edition) | 2010年 / 31卷 / 05期

关键词：

Austenitic stainless steel; Ferrites; Mechanical strength; Microstructure; Supercritical;

D O I：

10.3969/j.issn.1671-7775.2010.05.012

中图分类号：

学科分类号：

摘要：

In order to study the microstructure and mechanical property of a newly developed austenitic stainless steel Cr18Ni3Mn11Cu3NbN, the metallographic microstructure and fracture morphology were analysed, and the short-time tensile properties at room-temperarure and elevated-temperature were also detected. The metallographic analysis showed that NbN compounds were distributed in austenitic matrix, thereinto a few of them were precipitated as cluster. At the same time, a small amount of elevated-temperature ferrite and pure Nb phases were also presented. The fracture analysis showed that equiaxed dimples were at the fracture surface, indicating the existence of toughness fracture. In addition, the room-temperature mechanical properties of the steel could meet the standard ASME Code Case 2328-1, thereinto, its tensile strength was much larger than the standard value, the high-temperature tensile strength was greater than that of the Super304H steel, but the elongation was less because of the existence of a small amount of elevated-temperature ferrite.

引用

页码：549 / 552

页数：3

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