40CrNi2Si2MoVA 钢的大气应力腐蚀行为研究

中国腐蚀与防护学报

2006, Vol. 26

Issue (5): 275-281

研究报告

本期目录 | 过刊浏览

40CrNi2Si2MoVA 钢的大气应力腐蚀行为研究

张晓云;孙志华;刘明辉

北京航空材料研究院

PREDICTIVE MODEL FOR ATMOSPHERIC CORROSION OFALUMINIUM ALLOY BY ARTIFICIAL NEURAL NETWORK

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北京航空材料研究院

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摘要: 用单轴拉伸试样和预制裂纹试样研究40CrNi2Si2MoVA高强度钢在典型大气环境下的抗应力腐蚀性能.施加应力后的试样分别暴露于北京、青岛、万宁 3个不同的大气试验站.研究表明：40CrNi2Si2MoVA钢的抗应力腐蚀性能取决于环境，在海洋性环境下应力腐蚀性较高.扫描电子显微镜微观分析表明裂纹起始于表面的腐蚀点，并向试样内部扩展，为沿晶开裂，有二次裂纹存在.随着应力水平的增大，二次裂纹明显增加.

关键词 ：高强度钢, 大气腐蚀, 应力腐蚀

Abstract：An investigation of the stress corrosion cracking resistance of 40CrNi2Si2MoVA high strength steel in typical atmospheric environment is presented. Direct tension and pre-cracked stress-corrosion specimens were used. The direct tension stress-corrosion specimens were taken from the longitudinal direction of stick and stress level was 65, 75, 85 and 95 percent of the σ0.2 respectively. The pre-cracked specimens were taken from the forging and applied constant load. The samples were exposed in Beijing, Tuandao, and Wanning atmospheric test station. The results showed that SCC performance of 40CrNi2Si2MoVA steel depend on the environments. High SCC sensitivity was expressed in marine environment. The SEM showed that the crack initiated from pitting corrosion in the surface and developed to inner of the samples. It is intergranular mode of cracking, secondary cracking existed on the fracture surface. Large size secondary cracking increases obviously with the higher of stress level. Serious corrosion was observed on the samples exposed in marine environment.

Key words： BP neural network atmospheric corrosion

收稿日期: 2006-03-03

ZTFLH:

TC172

通讯作者: 张晓云 E-mail: xiaoyun.zhang@biam.ac.cn

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张晓云; 孙志华; 刘明辉 . 40CrNi2Si2MoVA 钢的大气应力腐蚀行为研究[J]. 中国腐蚀与防护学报, 2006, 26(5): 275-281 .
. PREDICTIVE MODEL FOR ATMOSPHERIC CORROSION OFALUMINIUM ALLOY BY ARTIFICIAL NEURAL NETWORK. J Chin Soc Corr Pro, 2006, 26(5): 275-281 .

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2006/V26/I5/275

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