热处理工艺对3J53合金组织及性能的影响

研究了热处理工艺对测量膜片材料3J53合金组织性能的影响。结果表明，3J53合金在920～1010℃温度区间固溶处理10 min时可获得均匀细小的晶粒组织和较低的硬度。并且，在980℃固溶温度下，合金晶粒尺寸的大小随固溶时间的增长变化不明显。进一步研究证明，3J53合金经920～1010℃×10 min固溶+670℃×5 h时效后，硬度为302～346 HV0.2,无法满足压力变送器要求。但经920℃固溶+冷轧+650～700℃×5 h时效处理后，材料的硬度显著提高。同时，当时效处理温度为670℃时，硬度达到峰值483 HV0.2,满足核级压力变送器要求。与进口产品对比发现，研制的3J53合金测量膜片样品的硬度、回差性能和原始量程温度影响性能均无显著差异，满足国产化应用要求。

Effect of heat treatment on microstructure and properties of 3J53 alloy

Effect of heat treatment process on the microstructure and properties of the diaphragm material 3J53 alloy was studied. The results show that after solution at 920-1010 ℃ for 10 min, the 3J53 alloy can obtain uniform and fine grain structure but lower hardness. The grain size did not change obviously after solution at 980 ℃ for different time. After solution at 920-1010 ℃ for 10 min and aging at 670 ℃ for 5 h, the hardness is 302-346 HV0.2, which can not meet the requirements of pressure transmitter. After solution at 920 ℃ and cold rolling and then aging at 650-700 ℃ for 5 h, the hardness increases significantly, which reaches a peak value of 483 HV0.2 when aging at 670 ℃, that can meet the requirements of nuclear grade pressure transmitter. Compared with the imported products, it is found that there is no significant difference in the hardness, return difference performance and original range temperature influence performance of the domestic 3J53 alloy diaphragm specimen, which meet the requirements of domestic application.