哈尔滨工程大学学报2012，Vol.33Issue(2)：249-254,6.DOI:10.3969/j.issn.1006-7043.201012002
1Cr11MoNiW1VNbN钢盐浴渗铬性能研究
Study on the properties of 1Cr11MoNiW1VNbN steel by salt bath chromizing
陈昭运 1赵旭红 2郝维勋 1李志强2
作者信息
- 1. 哈尔滨工程大学材料科学与化学工程学院,黑龙江哈尔滨150001
- 2. 哈尔滨汽轮机厂有限责任公司研究院,黑龙江哈尔滨150046
- 折叠
摘要
Abstract
To prevent scuffing of bolts in a steam turbine cylinder at a high temperature, the salt bath chromizing process of lCr11MoNiWIVNbN steel was studied. The microstructure of the chromizing layer was observed by optical microscopy (OM) and scanning electron microscopy (SEM). The hardness, elastic modulus, and toughness were obtained by a micro-hardness and nano-hardness tester. The wear resistance was evaluated by pin-on-disk wear tests. Potentiodynamic polarization curves and high-temperature oxidation tests were conducted to investigate the corrosion behavior. The results indicate that the chromized layer consists of Cr23C6 and Fe-Cr (columnar grains) phases after salt-bath chromizing and subsequent heat treatment and exhibits lower hardness and elastic modulus but higher toughness. The salt bath chromizing process is expected to be an effective way to prevent bolts from scuffing at high temperatures due to it significantly improved wear resistance, electrochemical corrosion resistance, and high temperature oxidation resistance.关键词
盐浴渗铬/咬死/磨损/腐蚀Key words
salt bath chromizing/ scuffing/ wear/ corrosion分类
矿业与冶金引用本文复制引用
陈昭运,赵旭红,郝维勋,李志强..1Cr11MoNiW1VNbN钢盐浴渗铬性能研究[J].哈尔滨工程大学学报,2012,33(2):249-254,6.
