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在 Ni-Cr 合金中加入3%Al 和0.3%Ce.细化合金晶粒组织可以拔成直径0.2～0.3 mm 细丝,形成弥散硬化型的高硬弹合金.实验表明:在600℃,3h 一次时效处理后再进行500℃,5 h 低温度二次时效处理能获得86%(质量分数)的过饱和富 Cr(α).测定析出富Cr(α)相颗粒的平均直径为1.6214 mm,颗粒的总面积占测绘面积的百分数为20.7%.二次时效处理使一次时效析出的富 Cr(α)相颗粒聚集最大,并且析出新生富 Cr(α)相颗粒细小,弥散分布,提高了合金的硬度和强度,改善了合金的韧性.
The addition of 3% Al and 0.3% Ce to the Ni-Cr alloy can refine the grain structure of the alloy and pull out 0.2-0.3 mm diameter filaments to form a dispersion-hardenable high-hard alloy.The experimental results show that at 600 ℃ for 3h After aging, the Cr (α) content of 86% (superscript subscript 2) was obtained after secondary aging at 500 ℃ for 5 h, and the average diameter of precipitated Cr (α) phase particles was 1.6214 mm, The total area of the particles accounted for 20.7% of the area surveyed. The secondary aging treatment maximized the accumulation of Cr (α) -phase particles precipitated by primary aging and precipitated fine and disperse newborn Cr (α) Hardness and strength, improve the toughness of the alloy.