锻造工艺对粉末冶金钼棒组织和性能的影响  

Effects of Forging Process on Microstructure and Mechanical Properties of Molybdenum Rod by Powder Metallurgy

作　　者：郭金洋 孙虎民 Guo Jinyang;Sun Humin(Luoyang High-tech Sifeng Electronic Materials Co.,Ltd.)

机构地区：[1]洛阳高新四丰电子材料有限公司

出　　处：《特种铸造及有色合金》2019年第1期9-11,共3页Special Casting & Nonferrous Alloys

摘　　要：采用冷等静压、烧结方式得到85mm的钼棒坯,之后采用不同锻造工艺将钼棒锻造至32mm,并对其组织和力学性能进行了测试对比。结果表明,锻造过程中回火温度、时间及回火次数以及锻造道次变形量等对锻造后钼棒组织和性能均有影响。采用的处理工艺如下:锻造前在1 200℃下保温120min,之后进行6模次锻造,每模次直径变形量为锻造前的10%～20%,整个锻造过程中每两模次进行中间回火,回火工艺为1 100℃×15min,最终得到抗拉强度达到667MPa,伸长率为26%,且组织均匀细小的钼棒。The molybdenum bar billet with diameter of 85 mm was prepared by cold isostatic pressure and sintering.Then the molybdenum bar with diameter of 32 mm was forged by different forging ways,and its microstructure and mechanical properties were tested comparatively.The results show that some parameters,such as the tempering temperature,tempering time,times of tempering and deformation rate in the forging process have effects on the microstructure and properties of the molybdenum bar after forging.The forging processing parameters were presented as follows:before forging,the blank of molybdenum bar kept at 1 200℃ for 120 min.After that,the molybdenum bar was forged for six times.After each forging,the diameter deformation of molybdenum bar billet reached 10%to 20% of that before forging.During the whole forging process,intermediate tempering was carried out every two times.The temperature and time of intermediate tempering were 1 100℃ for 15 min,respectively.Finally,the tensile strength and elongation of the molybdenum bar with fine and uniform structure reach 667 MPa and 26%,respectively.

关 键 词：钼棒 锻造 回火 组织 力学性能 

分 类 号：TG146.412[一般工业技术—材料科学与工程]