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传统液相烧结工艺制备的钨铜合金会产生很多缺陷,在压力加工下成为宏观裂纹。对比分析了在相同制备条件下的80W-Cu和85W-Cu合金的冷轧前后的内外部组织形貌,并对这两种合金内部和表面各区域的钨颗粒粒度进行了统计分析。结果表明:85W-Cu合金比80W-Cu合金含铜量少,在烧结过程中,85W-Cu合金没有足够的液铜填充到W-W骨架中,因而85W-Cu合金内部具有更多的孔隙,而这些孔隙缺陷是轧制时形成宏观裂纹的根源。
The traditional liquid-phase sintering process of tungsten-copper alloy will produce many defects, under pressure to become a macro-cracks. The internal and external microstructures of 80W-Cu and 85W-Cu alloys before and after cold rolling were compared and analyzed under the same conditions. The grain sizes of tungsten particles in the inner and the surface of the two alloys were analyzed statistically. The results show that the 85W-Cu alloy contains less copper than the 80W-Cu alloy. During the sintering process, 85W-Cu alloy does not have enough liquid copper to fill the WW framework, so 85W-Cu alloy has more pores inside, These pore defects are the source of macroscopic cracks during rolling.