摘要
采用扫描电镜、X衍射、有限元计算和应力腐蚀试验等技术分析了称重传感器2Cr13钢弹性体开裂机理。结果表明,弹性体失效属于应力腐蚀开裂;弹性体原回火温度处于2Cr13钢敏化和回火脆性区;弹性体N i-P镀层表面存在150 MPa拉应力;额定载荷加载时,弹性体端部六角头侧面存在127 MPa周向拉应力;适当降低回火温度并取消N i-P化学镀显著提高2Cr13钢弹性体应力腐蚀抗力。
The cracking mechanism of 2Cr13 steel spring element of load cell was analyzed with SEM ,X-ray diffraction, finite element analysis and stress-corrosion cracking（SCC） test. The results show that the failure of spring element be- longs to SCC ;the initial tempering temperature of spring elements is just in the temperature range of sensitization and tempering embrittlement;there is 150 MPa tensile stress on the surface of Ni-P plating coating ;while 127 MPa circumferential tensile stress exists on the side surface of hexagon head of spring element with rated loading;properly decreasing the tempering temperature and canceling Ni-P plating, the SCC resistance of 2Cr13 spring element could be improved.
出处
《金属热处理》
CAS
CSCD
北大核心
2008年第9期108-111,共4页
Heat Treatment of Metals
关键词
2CR13钢
弹性体
失效分析
应力腐蚀开裂
2 Cr13 steel
spring element
failure analysis
stress-corrosion cracking
