FM-52M镍基合金堆焊层高温拉伸性能研究

High Temperature Tensile Properties of FM-52M Nickel-base Alloy Cladding

在304不锈钢钢板采用TIG堆焊了FM-52M镍基合金,并利用Gleeble热模拟试验机对FM-52M堆焊层试样在不同条件下的高温拉伸性能进行了研究。结果表明：经750℃保温30 min处理后,FM-52M合金的强度与750℃保温30 s处理的相比明显降低;在高温、应力缓慢加载的条件下,FM-52M的力学性能明显下降。热处理温度为950℃时,拉伸速率为0.01 mm/s的堆焊试样强度和断后伸长率均比拉伸速率为0.5 mm/s的小。经过1200℃的峰值温度保温后,合金的屈服强度比950℃的试样略低,但断后伸长率更好。

FM-52 M nickel base alloy cladding was prepared on 304 stainless steel plate by TIG welding, and the high temperature tensile properties of FM-52 M cladding specimen under different conditions were studied by using Gleeble thermal simulation tester. The results show that the strength of FM-52 M alloy treated at 750℃ for 30 min is smaller than that of the alloy treated at 750℃for 30 s. Under the condition of high temperature and slow stress loading, the mechanical properties of FM-52 M decrease obviously. When the heat treatment temperature is 950 ℃, the strength and the elongation of the specimen under tensile rate of 0.01 mm/s are smaller than that under tensile rate of 0.5 mm/s. After heat treatment at the peak temperature of 1200 ℃, the yield strength of the alloy is slightly lower than that treated at 950 ℃, but the elongation is better.