Al元素对316L不锈钢组织和室温力学性能的影响  

Effect of Aluminum on Microstructure and Mechanical Properties of 316L Steel

作　　者：喇培清[1] 李玉峰[1] 刘闪光[1] 申达[1] 王鸿鼎[1] 

机构地区：[1]兰州理工大学有色金属新材料国家重点室培育基地,甘肃兰州730050

出　　处：《钢铁》2010年第5期71-75,87,共6页Iron and Steel

基　　金：国家自然科学基金资助项目(50674051)

摘　　要：通过WS-4非自耗真空电弧炉熔炼制备了加铝的质量分数为2%-10%的不锈钢316L,用光学金相显微镜观察了金相组织,用EPMA-1600电子探针分析了组织中各元素的分布,结合D8 ADVANCE型X射线衍射确定了合金中的基体相组成,并研究了室温压缩性能和硬度。结果表明：随着铝含量增加,碳化物由连续条状转变为质点状;铝元素固溶于合金基体中,当铝的质量分数小于6%时,基体相为γ相;当铝的质量分数大于6%时,基体相转变为α相,此时合金脆性大幅提高,合金由塑性材料转变为脆性材料。The 316L steels with 2%-10% Aluminum were prepared with WS-4 nonconsumable vacuum electric furnace.The microstructure of the alloys was investigated by optical microscope.The EPMA-1600 electron probe was used to analysize the distribution of the elements and the D8 ADVANCE X-ray diffraction analyzer was used to analyse the phases,then the compression property and hardness of the alloy samples were investigated at room temperture.The results show that the Carbide from continuous strip to material point with the increase in Al content.The aluminum is dissolved into the metal matrix,When the Al content is lesser than 6%,the phase of alloy matrix was γ-phase;when the Al content is more than 6%,the alloy matrix transfer to α-phase;and the alloy is transformed from plastic materials to brittle materials.

关 键 词：316L不锈钢 铝元素 显微组织 力学性能 

分 类 号：TG142.71[一般工业技术—材料科学与工程]