热处理对1Cr12Ni3Mo2VN马氏体耐热钢组织和性能的影响

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英文篇名：Effect of Heat Treatment on Structure and Properties of Martensite Heat-Resistant Steel 1Cr12Ni3Mo2VN 作者：王彧 ; 柳木桐 ; 钟平 英文作者：Wang Yu;Liu Mutong;Zhong Ping;Steel and Precious Metals Research Institute,Beijing Institute of Aeronautical Materials; 关键词：1Cr12Ni3Mo2VN马氏体耐热钢 ; 热处理 ; 组织 ; 性能 ; 时效 英文关键词：Martensite Heat-Resistant Steel 1Cr12Ni3Mo2VN;;Heat Treatment;;Structure;;Properties;;Ageing 中文刊名：TSGA 英文刊名：Special Steel 机构：北京航空材料研究院钢与稀贵金属所; 出版日期：2018-04-01 出版单位：特殊钢 年：2018 期：v.39;No.220 语种：中文; 页：TSGA201802019 页数：4 CN：02 ISSN：42-1243/TF 分类号：72-75

摘要

试验1Cr12Ni3Mo2VN钢(/%:0.13C,0.16Si,0.70Mn,11.42Cr,2.78Ni,1.67Mo,0.30V,0.036 0N)的冶金流程为30 t EAF-LF-VD-3 t ESR-锻造成Φ350mm材。研究了950~1 100℃淬火和200~700℃回火对1Cr12Ni3Mo2VN钢组织与性能的影响以及500℃,500~10000 h时效的拉伸性能。结果表明,淬火温度950~1 100℃对1Cr12Ni3Mo2VN钢力学性能的影响不明显;该钢的回火脆性区在600℃左右,但对钢的塑性的影响较小。经1 040℃淬火、540℃回火的1Cr12Ni3Mo2VN钢,在500℃时效500 h后,其抗拉强度和屈服强度分别下降了7.7%和5.8%,时效10 000 h后,其抗拉强度和屈服强度分别下降了13.4%和14.6%,断面收缩率下降了40%,主要原因是杂质元素在晶界处偏聚以及碳化物在晶界处析出。
        The metallurgical flowsheet of tested steel 1 Cr12 Ni3 Mo2 VN(/% : 0. 13 C,0. 16 Si, 0. 70 Mn,11.42 Cr,2. 78 Ni,1. 67 Mo, 0. 30 V, 0. 036 ON) is 30 t EAF-LF-VD-3 t ESR-forged to Φ350 mm products. The effect of quenching at 950 ~1 100 ℃ and tempering at 200 ~700 ℃ on structure and properties of steel 1 Cr12 Ni3 Mo2 N and the tensile properties of steel aging at 500 ℃ for 500 ~10 000 h have been studied. Results show that the effect of quenching temperature at 950 ~1 100 ℃ on mechanical properties of steel 1 Cr12 Ni3 Mo2 VN is not obvious; the temper brittleness zone of steel is at about 600 ℃, nevertheless tempered at this temperature the decrease of plasticity of steel is smaller; as compared with the mechanical properties of steel 1 Cr12 Ni3 Mo2 VN quenched at 1 040 ℃ and tempered at 540 ℃, with ageing at 500 ℃for 500 h the tensile strength and yield strength of steel decrease respectively by 7. 7% and 5. 8%, and with ageing at 500℃ for 10 000 h the tensile strength and yield strength of steel decrease respectively by 13. 4% and 14. 6%,and the reduction of area of steel decreases by 40%, its main cause is aggregation of impurity elements and deposition of carbide at grain boundary.

引文

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