不同热处理状态国产9Ni钢的超低温断裂韧性
Fracture Toughness of 9Ni Steel after Different Heat Treatment at Super-Low Temperature
摘 要
依据BS 7448标准, 对国产轧制态、调质处理(QT)态和两相区热处理(IHT)态的9Ni钢分别进行了-196 ℃裂纹尖端张开位移(CTOD)测试, 并对断口形貌进行了观察。结果表明: QT态钢具有最好的超低温断裂韧性, 轧制态钢的断裂韧性比QT态和IHT态的低很多; 轧制态、QT态和IHT态钢的稳定扩展区断口全部为韧窝形貌, 呈韧性断裂。
热处理状态
裂纹尖端张开位移(CTOD)
9Ni steel
heat treatment
crack tip opening displacement (CTOD)
Abstract
The 9Ni steels at different states, rolling and the ordinary quenching tempering (QT) and interstitial heat treatment(IHT) were studied by crack tip opening displacement (CTOD) test according to BS7448 at -196 ℃. The fracture morphology was observed. The results indicated the specimen after QT treatment showed the best fracture toughness at ultralow temperature, and the fracture toughness of the specimen at rolled state was lower than that after QT treatment and IHT treatment. The fracture morphology of the tabilization expands area of specimens after rolling, QT treatment and IHT treatment were all dimple patterns with the features of ductile fracture.
中图分类号 TG111.9
所属栏目 材料性能及其应用
基金项目 中国石油天然气股份有限公司科技项目
收稿日期 2012/1/30
修改稿日期 2012/8/8
网络出版日期
作者单位点击查看
备注宫少涛(1980-), 男, 陕西西安人, 工程师, 学士。
引用该论文: GONG Shao-tao,SUN Liang,XIONG Qing-ren,ZHAO Wen-zhen. Fracture Toughness of 9Ni Steel after Different Heat Treatment at Super-Low Temperature[J]. Materials for mechancial engineering, 2013, 37(2): 71～73
宫少涛,孙良,熊庆人,赵文轸. 不同热处理状态国产9Ni钢的超低温断裂韧性[J]. 机械工程材料, 2013, 37(2): 71～73
被引情况:
【1】李继红,张兴璇,刘明志,张敏, "药皮辅料交互作用对1Ni9钢焊条脱渣性的影响",机械工程材料 39, 94-97(2015)
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参考文献
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【6】BS 7448: Part 2: 1997, Fracture mechanics toughness tests. Part 1.Method for determination of K IC, critical CTOD and critical J values of welds in metallic materials[S].
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【2】B FULTZ, MORRIS J W. The Mechanical stability of precipitated austenite in 9Ni steel[J].Metall Trans A, 1985, 16(12): 2251-2256.
【3】WU K C. Correlation of properties and microstructure in welded Ti-6Al-6V-2Sn[J].Welding Journal, 1981, 60(11): 219-226.
【4】BAESLACK W A, BANAS C M. A comparative evaluation of laser and gas tungsten arc weldments in high temperature titanium alloy[J].Welding Journal, 1981, 60(7): 121-130.
【5】BS 7448: Part 1: 1991, Fracture mechanics toughness tests. Part 1.Method for determination of K IC, critical CTOD and critical J values of metallic materials[S].
【6】BS 7448: Part 2: 1997, Fracture mechanics toughness tests. Part 1.Method for determination of K IC, critical CTOD and critical J values of welds in metallic materials[S].
【7】ANDERSON T L, DODDS J R H. Specimen size requirements for fracture toughness testing in the transition region[J].Test Eval, 1991, 19(2): 123-135.
【8】FULTZ B, KIM J I, KIM Y H, et al. The chemical composition of precipitated austenite in 9Ni steel[J].Metall Trans A, 1986, 17(6): 967-972.
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