研究了微波烧结温度和时间对钨基合金挤压棒坯显微组织及力学性能的影响.采用高倍SEM和光学金相显微镜分别对合金断口和显微组织进行了形貌观察;对合金相对密度、抗拉强度、延伸率和硬度进行了测定和分析.结果表明:当微波烧结时间为30 min时,随着烧结温度的升高,合金性能呈峰值变化,烧结温度为1550℃时,合金的力学性能达到极大值,相对密度、抗拉强度、延伸率和HRC硬度分别为98.3％、920 MPa、9.7％和30.5;当微波烧结温度为1550℃时,随着烧结时间的延长,合金的力学性能先上升后下降; 随着微波烧结温度的升高及微波烧结时间的延长,钨晶粒的尺寸逐渐增大.
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