摘要
针对大单重掺杂钨条经垂熔烧结后沿轴向密度呈两端低、中间高分布,从而导致旋锻加工后钨杆两端表面产生裂纹、劈裂的现象,提出将掺杂钨条两端局部直径减小的方案,并确定了最佳的减径量。当掺杂钨条两端直径减小1.2~1.8 mm时,垂熔烧结后钨条两端密度得到提高,整体密度分布差异减小,且限径区域与非限径区域的晶粒度几乎一致,同时旋锻加工表面裂纹减少,钨条的整体加工性能提高。
After vertical melting sintering, the axial density of large unit-weight doped tungsten rods is low at the two ends and high in the middle, which leads to cracks and splits on the end surface of tungsten rods after rotary forging.Therefore, the scheme of reducing the local diameter of both ends of doped tungsten rods was proposed, and the optimal diameter reduction amount was determined.When the diameter of the two ends of doped tungsten rods decreases by 1.2~1.8 mm, the end density of tungsten rods after vertical melting sintering increases, the difference of the overall density distribution decreases, and the grain size of the restricted area is almost the same as that of the non restricted area.At the same time, the surface cracks after rotary forging are reduced, and the comprehensive processability of tungsten rods is improved.
作者
范光亮
王政伟
FAN Guang-liang;WANG Zheng-wei(Chengdu Branch,Zigong Cemented Carbide Co.,Ltd.,Chengdu 610100,China)
出处
《稀有金属与硬质合金》
CAS
CSCD
北大核心
2021年第3期37-40,共4页
Rare Metals and Cemented Carbides
关键词
掺杂钨条
垂熔烧结
轴向密度差异
减径
晶粒度
裂纹
doped tungsten rod
vertical melting sintering
axial density difference
diameter reduction
grain size
crack
