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Effect of Titanium and Boron Microalloying on Sulfide Stress Cracking in C110 Casing Steel

机译:钛和硼微合金化对C110壳钢硫化物应力裂纹的影响

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摘要

The effect of Ti and B microalloying on the hardenability, prior austenite grain size (PAGS), mechanical properties, and sulfide stress cracking (SSC) of C110 grade steel was studied by Jominy testing, static tensile testing, an optical microscope (OM), scanning electron microscopy (SEM) and double cantilever beam (DCB) testing. The results show that the addition of 0.015% Ti and 0.002% B into a medium-carbon Fe-Cr-Mo-Nb-V steel increased the hardenability and refined the PAGS and quenched martensite packets, and the size of carbides was reduced. It is believed that these behaviors are responsible for the improvement in the threshold stress intensity factor KISSC.
机译:通过Jominy测试,静态拉伸试验,光学显微镜(OM)研究了Ti和B微合金对C110级钢的淬透性,先前奥氏体晶粒尺寸(PAG),机械性能和硫化物应力裂解(SSC)的影响。扫描电子显微镜(SEM)和双悬臂梁(DCB)测试。结果表明,向中碳Fe-Cr-Mo-Nb-V钢加入0.015%Ti和0.002%B增加淬透性并精制PAG和淬火马氏体包,碳化物的尺寸降低。据信,这些行为负责阈值应力强度因子Kissc的改进。

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