细匀化处理对双相不锈钢组织及性能的影响  

Influence of finely homogenization on microstructure and properties of duplex stainless steel

作　　者：陈雷[1] 王建峰[1] 龙红军[1] 毛天桥 李飞[1] 张英杰[1] 裴建明[1] 赵彤 

机构地区：[1]燕山大学国家冷轧板带装备及工艺工程技术研究中心,秦皇岛066004 [2]中国第二重型机械集团德阳万航模锻有限责任公司,德阳618013

出　　处：《塑性工程学报》2016年第2期109-114,共6页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(51101136);河北省自然科学基金-钢铁联合基金资助项目(E2016203284);河北省高等学校科学技术研究青年基金资助项目(QN20141071);国家冷轧板带装备及工艺工程技术研究中心开放课题(NECSR-201501)

摘　　要：以2205双相不锈钢为研究对象,通过微拉伸力学性能测试、金相显微观察、断口扫描分析及浸泡腐蚀与电化学腐蚀等分析,研究其通过过饱和单相处理并经重度冷变形及固溶处理实现双相不锈钢细匀化后的组织特征及其性能变化。结果表明,过饱和单相区工艺可明显细化奥氏体相且使其分布均匀,显著提高两相组织的均质化程度,有助于消除各向异性,并使得抗拉强度增大;不同工艺下材料的抗拉强度值与显微硬度值之间满足一定关系。经6%的FeCl_3溶液浸泡加速腐蚀试验及电化学试验获得的极化曲线结果综合评价,细匀双相组织的耐蚀性较好。Microstructure and mechanical properties of fine-homogenized 2205 duplex stainless steel were investigated by mechanical test,metallographic observation,SEM and electrochemical workstation.The microstructure and properties development of heavily cold-deform duplex stainless steel after solution treatment based on supersaturatedαwere studied.The results show that the supersaturatedαcraft can make austenite phase fine and uniform,significantly improves the homogenization degree of the（α＋γ）microduplex structure and eliminates the anisotropy of microstructure.Besides,the tensile strength increases but the ductility decreases for fine-uniform duplex microstructure.However,the relationship between hardness and strength of duplex stainless steel at various crafts is identified.The（α＋γ）microduplex structure is better at corrosion resistance by 6% FeCl_3 solution immersion tests and the polarization curve.

关 键 词：双相不锈钢 力学性能 重度冷变形 耐蚀性 

分 类 号：TG142.7[一般工业技术—材料科学与工程]