粉末轧制-叠层烧结法制备较厚93W-4.9Ni-2.1Fe高密度钨合金片材的研究

Study on Preparation of Thicker 93W-4.9Ni-2.1Fe Tungsten Heavy Alloy Sheets by Powder Rolling-Stacking Sintering

利用粉末轧制-叠层烧结法制备了较厚93W-4.9Ni-2.1Fe高密度钨合金片材,对比了单片烧结坯和叠烧坯(即较厚钨合金片材)的组织与性能,并研究了冷轧加工后叠烧坯组织与性能的变化。结果表明:粉末轧制-叠层烧结法所制备较厚高密度钨合金片材的组织均匀,片层之间结合良好,无缝隙或镍铁过渡层等缺陷,其相对密度、硬度和抗拉强度均与单片烧结坯相当;冷轧加工后,叠烧坯力学性能明显提高,故粉末轧制-叠层烧结法是制备较厚高密度钨合金片材的有效方法。

The thicker 93W-4.9Ni-2.1Fe tungsten heavy alloy sheets were prepared by powder rolling-stacking sintering. The comparison of microstructure and properties was conducted between single sintered tungsten alloy sheets and stacking sintered ones （i. e. thicker tungsten alloy sheets）,and the influences of cold-rolling on microstructure and properties of stacking sintered alloy sheets were studied. The results show that the thicker tungsten heavy alloy sheets can be prepared with homogeneous microstructure and well combined layers by powder rolling-stacking sintering, and their relative density, hardness and tensile strength are comparable with those of single sintered alloy sheets. Moreover,the mechanical properties of stacking sintered alloy sheets are improved significantly by cold-rolling. Therefore, powder rolling-stacking sintering is effective for preparation of the thicker tungsten heavy alloy sheets.