热风钎焊S30403奥氏体不锈钢高温下及高温冷却后的力学性能试验研究  

Experimental Investigation on Mechanical Properties of Hot-air Brazed S30403 Austenitic Stainless Steel at High Temperatures and After Cooling

作　　者：谭瑞昕 楼国彪[1,2] 陶宇超 王美南 李舜 苏葛 TAN Ruixin;LOU Guobiao;TAO Yuchao;WANG Meinan;LI Shun;SU Ge(College of Civil Engineering,Tongji University,Shanghai 200092,China;State Key Laboratory for Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China;Broad Sustainable Building Co.,Ltd.,Changsha 430121,China)

机构地区：[1]同济大学土木工程学院,上海200092 [2]同济大学土木工程防灾减灾全国重点实验室,上海200092 [3]远大可建科技有限公司,长沙430121

出　　处：《湖南大学学报(自然科学版)》2025年第3期201-212,共12页Journal of Hunan University:Natural Sciences

基　　金：国家重点研发计划项目(2017YFC0703808)。

摘　　要：以S30403奥氏体不锈钢为原材料的热风钎焊不锈钢芯板具有突出的力学特性和环境友好性.相较于传统热辐射钎焊,热风铜钎焊技术提高了生产效率,并将加工成本降低了30%以上.热风钎焊时,不锈钢经过铜钎焊炉高速高温(1100℃)热风处理,会影响不锈钢力学性能.本文对热风钎焊S30403奥氏体不锈钢进行了高温下和高温冷却后拉伸试验,得到弹性模量、名义屈服强度、极限强度、断后伸长率等主要力学性能数据,建立高温下主要力学性能指标计算模型,并基于Rasmussen模型建立高温应力-应变本构关系.研究表明,热风钎焊S30403奥氏体不锈钢在高温下的初始弹性模量、名义屈服强度、极限强度随温度升高而下降,900℃时,弹性模量约为常温时39%,名义屈服强度约为常温时20%,极限强度约为常温时10%.采用不同的冷却方式时,热风钎焊S30403奥氏体不锈钢的名义屈服强度、极限强度区别不大,但弹性模量和断后伸长率会发生较明显的变化.Hot air brazed stainless steel core plates made from S30403 austenitic stainless steel exhibit outstanding mechanical properties and environmental friendliness.Compared with conventional hot radiation brazing,the hot air copper brazing technology increases productivity and reduces processing costs by more than 30%.Stainless steel is subjected to high speed and high temperature(1100°C)hot air treatment during the copper brazing furnace,which affects the mechanical properties of stainless steel.The tensile test of hot air brazed S30403 austenitic stainless steel under high temperatures and after cooling from high-temperature was carried out,and the main mechanical properties such as elastic modulus,nominal yield strength,ultimate strength,elongation after break were obtained.A calculation model of main mechanical properties at high temperatures of hot air brazed S30403 was established,and a high temperature stress-strain constitutive model was established based on the Rasmussen model.The study shows that the initial modulus of elasticity,nominal yield strength and ultimate strength of hot air brazed S30403 austenitic stainless steel at high temperatures decreases with the increasing temperature.At 900℃,modulus of elasticity is about 39%of that at room temperature,nominal yield strength is about 20%and ultimate strength is about 10%.The cooling mode has a minimal effect on the nominal yield strength and the ultimate strength of hot-air brazed S30403 austenitic stainless steel,but it has a more significant impact on the modulus of elasticity and elongation after break.

关 键 词：奥氏体不锈钢 钎焊 高温 本构模型 冷却方式 力学性能 

分 类 号：TU511.3[建筑科学—建筑技术科学]