Monel-400合金高温力学性能及断裂行为分析  

High Temperature Mechanical Properties and Fracture Behaviors of Monel-400 Alloy

作　　者：陈重毅[1] 王文君 麻永林[1] 邢淑清[1] 陆恒昌[1] 

机构地区：[1]内蒙古科技大学,内蒙古包头014010 [2]包钢西北创业有限公司,内蒙古包头014010

出　　处：《稀有金属材料与工程》2016年第7期1782-1787,共6页Rare Metal Materials and Engineering

基　　金：国家科技重大专项子课题项目(2009ZX04014-064-05);内蒙古科技大学材料与冶金学院青年人才孵化器平台项目

摘　　要：利用Gleeble-1500D热模拟机对不同温度下的Monel-400合金及熔敷金属进行拉伸试验。结果表明,母材和熔敷金属在高温下的强度不断下降,母材的塑性随温度的升高而增大,熔敷金属的塑性急剧下降。在高温下,细小弥散的第二相粒子对熔敷金属起到了明显的强化作用,而熔敷金属的塑性发生了严重劣化。母材从低温到高温（700-1100℃）的断裂形式是韧性断裂,熔敷金属断裂形式由韧性断裂逐步变为脆性断裂。在实际热加工和应用过程中,避免熔敷金属发生大变形,防止产生加工热裂纹,避免母材在700℃以上使用,可以适当提高熔敷金属的使用范围。In order to investigate high temperature mechanical properties and fracture behavior of Mone1-400 alloy and cladding metal,tensile tests were conducted at different temperatures on a Gleeble-1500 D thermal simulation machine.The results show that strength of base metal and cladding metal declines from 700 ℃to 1100 ℃.The plasticity of base metal increases with increasing temperature,while that of the cladding metal falls.At 700 ℃,the dispersed second phase particles play a significant role in strengthening the yield strength and tensile strength of the cladding metal,but the plasticity of cladding metal is seriously deteriorated.In the range of 700~1100 ℃,the fracture pattern of base metal is ductile fracture,while that of cladding metal changes gradually from ductile fracture to brittle fracture.In the actual thermal processing and application,it is crucial to avoid cladding metal large deformation to prevent thermal cracking,and the base metal should not be used above 700 ℃.

关 键 词：镍基合金 熔敷金属 高温力学性能 断裂行为 断口形貌 

分 类 号：TG115.5[金属学及工艺—物理冶金]