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10Cr3Mo钢是以N80钢为基础加入了Cr、Mo、Ni等合金元素,对相同热处理工艺下的这两种套管钢进行了高温力学性能试验,并对其进行显微组织结构观察。通过蠕变试验,推出了这两种钢的蠕变本构方程。对两种钢进行室温、高温拉伸试验以及室温冲击试验结果表明,在提高Cr、Mo等元素含量后,10Cr3Mo钢的抗拉强度仍维持原有钢级水平,屈强比略有增加,伸长率稍有下降,冲击性能有所降低,但高温抗蠕变能力显著提升。使用10Cr3Mo钢作为80钢级的热采井套管将能有效减少因蠕变因素导致的热采井失效问题。
10Cr3Mo steel is based on the N80 steel by adding Cr, Mo, Ni and other alloying elements, the same heat treatment process under the two high-temperature mechanical properties of casing steel, and its microstructure observation. Through the creep test, the creep constitutive equations of both steels are introduced. The results of tensile tests at room temperature and high temperature at room temperature and at room temperature show that the tensile strength of 10Cr3Mo steel maintains the original steel grade and the yield ratio slightly increases after the content of elements such as Cr and Mo is increased. Slight decline in the length of the impact performance has been reduced, but the high temperature creep resistance significantly improved. The use of 10Cr3Mo steel as a heat recovery casing of grade 80 steel will effectively reduce thermal failure due to creep.