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利用机械球磨、放电等离子体烧结法制备了质量分数(%,下同)为W-(10~30)V-(10~30)Cr的三元合金,对烧结后的合金进行了显微结构和室温力学性能研究。结果表明,采用放电等离子体烧结可以制得相对密度为99.7%的W-30V-20Cr合金,其实际密度比烧结纯钨降低了49.74%;显微结构分析表明V、Cr可以很好地合金化,形成塑性连续相,包裹在钨分散相的周围,很好地改善了钨合金的力学性能,W-30V-20Cr的抗弯强度为437.13 MPa,比烧结纯钨增加了25%,HV硬度为6154 MPa;W-30V-20Cr合金具有较高的断裂韧性值,为15.51 MPa·m1/2。
The ternary alloy with W- (10-30) V- (10-30) Cr was prepared by mechanical ball milling and discharge plasma sintering. The microstructure of the alloy after sintering And room temperature mechanical properties. The results show that the W-30V-20Cr alloy with a relative density of 99.7% can be obtained by spark plasma sintering. The actual density of the W-30V-20Cr alloy is 49.74% lower than that of pure tungsten. Microstructure analysis shows that V and Cr can be well alloyed , Forming a plastic continuous phase and wrapping around the tungsten dispersed phase, which improved the mechanical properties of the tungsten alloy well. The flexural strength of W-30V-20Cr was 437.13 MPa, which was 25% higher than that of pure tungsten. HV hardness was 6154 MPa; W-30V-20Cr alloy has high fracture toughness value of 15.51 MPa · m1 / 2.