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依据磁致伸缩理论和细晶强化方法,选取了具有细化晶粒作用的顺磁性元素W、Nb,借助热力学计算软件Factsage进行合金辅助设计,以FeNi36为基础,通过W+Nb二元合金化熔炼、锻打成形及热处理等工艺,制取具有低膨胀系数、高强度的膨胀合金,并根据试样化学分析、金相和电镜扫描、晶粒度、显微硬度以及膨胀系数等检测结果,研究了合金低膨胀和高强度的机理。结果表明:W+Nb具有良好的细化晶粒作用,能够使基体保持低的膨胀系数和高的显微硬度。
Based on the theory of magnetostriction and the grain refinement, the paramagnetic elements W and Nb with grain refinement were chosen. Alloying design was performed with Factsage of thermodynamic calculation software. Based on FeNi36, W + Nb binary alloying Smelting, forging forming and heat treatment process, prepared with low expansion coefficient, high strength of the expansion alloy, and according to the sample chemical analysis, metallographic and electron microscopy scanning, grain size, microhardness and expansion coefficient test results, The mechanism of low expansion and high strength alloy was studied. The results show that W + Nb has a good grain refinement effect and can maintain the matrix with low coefficient of expansion and high microhardness.