影响16Mn热轧钢板延性断裂韧度J_(ⅠC)的因素  

FACTORS OF INFLUENCING THE DUCTILE FRACTURE TOUGHNESS J_(ⅠC) OF HOT-ROLLED 16Mn STEEL

作　　者：门长峰[1] 方陆鹏[1] 孙建军[1] 

机构地区：[1]天津工程师范学院机械系,天津300222

出　　处：《机械强度》2008年第2期329-332,共4页Journal of Mechanical Strength

摘　　要：初步探讨正火热处理和应变循环加载对16Mn延性断裂韧度JⅠC的影响。实验结果表明,16Mn热轧钢板正火后延性断裂韧度JⅠC大约是正火前3倍左右,应变循环加载对钢材的延性断裂韧度JⅠC的影响是很明显的,钢材单调拉伸0.3%应变后,延性断裂韧度JⅠC均比未经单调拉伸0.3%应变时降低了11%。控制±0.3%全应变的循环加载500周后,延性断裂韧度JⅠC比未经单调拉伸0.3%应变时钢的延性断裂韧度JⅠC提高了15%,产生相反的差异的原因还有待于进一步的研究。A preliminary investigation was made in this research to test the influence of cyclic strain on JIC. the ductile fracture toughness of steels. The test results showed that the ductile fracture toughness JIC of hot-relied 16Mn steel is about 3 times than no normalizing, the influence of cyclic strain to fracture toughness of 20G steels is obvious, after drawing 0.3 % strain, the ductile fracture toughness of them are all decreased 11%. The cyclic strain loading controlled within a total strain of ±0.3 % after 500 cycles, compared with the no drawing 0.3% strain steels, the ductile fracture toughness are raised 15%, the reason for the converse difference is worth further research.

关 键 词：应变疲劳 循环加载 正火 延性断裂韧度 

分 类 号：TG142.31[一般工业技术—材料科学与工程] TG115.57[金属学及工艺—金属材料]