陈重毅,麻永林,邢淑清,王文君,陆恒昌

• 1:内蒙古科技大学材料与冶金学院
• 2:包钢西北创业有限公司包钢设计研究院

摘要(Abstract)：

为了得到Monel-400合金焊材熔敷金属的高温力学性能及断裂形式,利用Gleeble-1500D热模拟机对不同方案(最高温度保温→降温到试验温度→拉伸、试验温度保温→拉伸)和不同温度(700、800、900、1000和1100℃)下的熔敷金属进行拉伸试验。结果表明,熔敷金属在700℃和800℃下具有很好的高温力学性能和塑性,最大屈服强度和抗拉强度分别为148.6 MPa和284.1 MPa,最大断面收缩率和伸长率分别为78%和11%,在此温度区间,试验方案对材料的屈服强度、断面收缩率和伸长率有较大影响,最大差距分别为44%、36%和35%,对材料的抗拉强度影响较小。在900~1100℃之间,随着试验温度的升高,材料的力学性能和塑性急剧下降,并随温度的升高逐步趋于一致,最小屈服强度和抗拉强度分别为19.3 MPa和68.6 MPa,最小断面收缩率和伸长率分别为18.85%和0.87%,在此温度区间,试验方案对材料的力学性能和塑性影响很小。经QUANTA-400环境扫描电子显微镜观测,熔敷金属在700℃下的断裂形式为韧性断裂,在800~900℃之间出现了低塑性区,产生了热脆现象,在1100℃下的断裂形式为脆性断裂。

关键词(KeyWords)： 镍基合金;熔敷金属;高温性能;断口形貌

Abstract:

Keywords:

基金项目(Foundation): 科技重大专项子课题项目(2009ZX04014-064-05)

作者(Author): 陈重毅,麻永林,邢淑清,王文君,陆恒昌

DOI: 10.13289/j.issn.1009-6264.2014.06.007

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