CrNiMo-CrNi3Mo-CrNiMo三层复合超高强度钢板开发  

Development of CrNiMo-CrNi3Mo-CrNiMo Triple-Layer Clad Ultra-High Strength Steel Plate

作　　者：李雷[1] 李福坤 苏春霞 陈本文[2,3] 杨晰 高山[2,3] Li Lei;Li Fukun;Su Chunxia;Chen Benwen;Yang Xi;and Gao Shan(Manufacturing Management Department of Angang Steel Co,Ltd,Anshan 114021;State Key Laboratory of Metal Material for Marine Equipment and Application,Anshan 114009;Technology Center of Angang Steel Co,Ltd,Anshan 114009)

机构地区：[1]鞍钢股份有限公司制造管理部,鞍山114021 [2]海洋装备用金属材料及其应用国家重点实验室,鞍山114009 [3]鞍钢股份有限公司技术中心,鞍山114009

出　　处：《特殊钢》2020年第3期28-31,共4页Special Steel

摘　　要：为了开发同时具有超高强度和良好韧性的低合金超高强度钢板,采用30MnCrNiMo连铸坯和33MnCrNi3Mo钢锭,经过真空复合焊接,高温轧制,淬火+低温回火热处理工艺研制出15 mm CrNiMo-CrNi3MoCrNiMo三层复合超高强度钢板;利用探伤、拉伸、冷弯、冲击、硬度等试验检验其结合度和力学性能;利用光学显微镜、扫描电镜等分析三层复合超高强度钢的组织和冲击断口形貌。结果表明,采用该工艺生产的三层复合超高强度钢板结合性良好,能够满足GB/T 7734-2015Ⅰ级探伤要求;复合钢板的综合力学性能良好,结合面处硬度值存在明显的过渡区域;结合面组织和基体组织均为回火马氏体组织。In order to develop low alloy ultra-high strength steel with super high strength and good toughness,a 15 mm CrNiMo-CrNi3Mo-CrNiMo triple-layer clad ultra-high strength steel is developed by 30 MnCrNiMo steel billet and 33MnCrNi3Mo steel ingot,the process consists vacuum combined welding,high temperature rolling,quenching and low temperature tempering heat treatment.The bonding degree and mechanical properties are tested by flaw detection,tensile,impact,cold bending and hardness tests.Microstructure and the impact fracture of triple-layer clad ultra-high strength steel are analyzed by means of optical microscope and scanning electron microscope.Results show that the triple-layer clad ultrahigh strength steel produced by current process has good bonding properties and can satisfy the GB/T 7734-2015 Ⅰ demand of flaw detection.The comprehensive mechanical properties of clad steel plate are fine,and there is obvious transition zone in hardness of the joint surface.Both the structure at bonding site and matrix structure are tempered martensite structure.

关 键 词：低合金超高强度钢 复合钢板 真空焊接 探伤 

分 类 号：TG142[一般工业技术—材料科学与工程]