热沉钨铜合金薄板冷轧裂纹产生机理的研究

Investigation of Crack Mechanism of W-Cu Alloy Thin Sheet After Cold Rolling

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。

Tungsten copper alloy prepared by the traditional liquid phase sintering will produce a lot of defects, which becomes macroscopic cracks in pressure processing. The morphologies of internal and external microstrucmre of 80W-Cu and 85W-Cu alloys before and after cold rolling under the same conditions were contrasted and analyzed. The tungsten particle size of 80W-Cu and 85W-Cu in the internal and external zones were analyzed using particle size statistics analysis method. The results indicate that 85W-Cu alloy has less copper compared with 80W-Cu alloy, and it has less liquid copper to fill the W-W skeletons during the sintering process, so the internal zones of 85W-Cu alloy have lots of pores, which is the root to form macrocracks during rolling.