Al元素对310S耐热钢高温压缩性能的影响  

Effect of Aluminum on high-temperature compressibility of 310S steel

作　　者：喇培清[1] 王鸿鼎[1] 刘闪光[1] 申达[1] 刘雪梅[1] 鞠倩[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料重点实验室,甘肃兰州730050

出　　处：《兰州理工大学学报》2010年第6期9-12,共4页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(50674051)

摘　　要：通过WS-4非自耗电弧炉熔炼制备Al质量分数2%～10%的耐热不锈钢310S,用Mef3光学金相显微镜和XRD研究其显微组织,采用Thermechastor-W热/力模拟试验机对所制备合金的高温压缩性能进行研究.结果表明,随着Al含量的增加,碳化物由网状转变为细小颗粒组成的不连续网状,最终转变为颗粒状,基体在含Al质量分数大于6%时由γ相转变为α相.不同Al含量的合金流变应力范围基本一致,合金的高温屈服强度由未添加Al元素时的74 MPa先降低至61 MPa后开始升高,在Al质量分数为6%时达到最大值86 MPa,之后高温屈服强度逐渐降低,加Al后合金热加工性能并未显著改善.Heat resisting stainless steel 310S with mass-fraction of 2%-10% Al was prepared by WS-4 non-consumable melting in arc furnace,their microstructure was investigated with Mef3 optical microscopy and XRD,and its high-temperature compressibility was investigated with Thermechastor-W heat/power simulator.The result showed that,with increasing of Al content,the microstructure of carbide changed from the network-formed to discontinuous network-formed with fine particles,and then the particulates formed in the end.The matrix changed from γ-phase to α-phase when the mass-fraction of aluminum was greater than 6%.The range of creeping stress was the same for the alloy with different contents of aluminum.The high-temperature yield strength σ0.2 of the alloy at the high temperature decreased at first from 74 MPa to 61 MPa and then increased with mass-fraction of Al,getting its maximum 86 MPa at 6%.Afterwards,the high-temperature yield strength decreased gradually.By adding of aluminum,the performance of hot-manufacturing of the alloy did not significantly improved.

关 键 词：310S耐热钢 AL元素 高温压缩性能 

分 类 号：TG142.73[一般工业技术—材料科学与工程]