超壁厚12CrNi5MoV钢锻件组织与力学性能研究
Study on Microstructure and Mechanical Properties of Super-thick 12CrNi5MoV Steel Forgings
牛继承， 王任甫， 袁亚民， 张玉祥
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作者单位：中国船舶重工集团公司 第七二五研究所，河南 洛阳 471039）
中文关键字：12CrNi5MoV钢； 超壁厚； 成分； 组织； 力学性能
英文关键字：12CrNi5MoV steel; super wall thickness; composition; microstructure; mechanical property
中文摘要：通过调整生产工艺并按上限成分试制，研究了230 mm超壁厚12CrNi5MoV钢锻件的组织和力学性能。结果表明，超壁厚12CrNi5MoV钢锻件具有良好的淬透性，调质后可获得细小的回火马氏体及贝氏体回火组织，其各项力学性能完全满足技术指标要求，并且低温韧性良好，截面性能优良。
英文摘要： The microstructure and mechanical properties of super-wall-thick 12CrNi5MoV steel forgings with 230 mm thickness were studied by adjusting the production process and trial-producing with the upper limited composition. The results show that the forgings have perfect hardenability. The fine tempered martensite and bainite are obtained in the super-wall-thick forgings after quenching and tempering, and all mechanical properties can satisfy the qualification requirements, and its low-temperature toughness and cross-section performance are excellent.