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

作　　者：万向武 曾贵[1] 常真[1] 俞圣雯[1] 李运波[1] 朱玉斌[1] 

机构地区：[1]上海大学材料科学和工程学院,上海200072

出　　处：《热加工工艺》2015年第1期153-155,共3页Hot Working Technology

摘　　要：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.

关 键 词：W-Cu合金 孔隙 宏观裂纹 钨颗粒 

分 类 号：TG335.55[金属学及工艺—金属压力加工] TG166.7