再生高密度钨合金的性能

Properties of recycling tungsten heavy alloy

采用氧化还原法回收钨合金切削废料 ,用回收粉末及镍、铁元素粉配制成 91W 6Ni 3Fe系高密度合金的混合粉 ,经压制、脱胶、烧结制得再生高密度钨合金。结果表明 :所得再生合金的性能同非回收粉末所制备的合金性能相当 ,再生钨合金的密度随着烧结温度的升高而先升高后有所降低 ,最大密度为 17.12 g/cm3 ,硬度随着烧结温度的升高而降低 ;当烧结温度为 14 4 0℃时再生合金的强度和塑性达到较好的配合 ,抗拉强度为 92 2 .95MPa ,延伸率为 2 0 .18% ;经真空热处理后 ,再生钨合金性能得到改善 ,抗拉强度和延伸率得到不同程度的提高 ,抗拉强度比热处理前提高了约 6 .4 4 % ,延伸率比热处理前提高了约 4 3.4 2 %。

The recycling tungsten heavy metal alloy powder was obtained by oxidation-reduction process. The recycling powder was mixed homogeneously with appropriate amount pure nickel and iron powder. Then the mixed powder was pressed and sintered to get the recycling tungsten heavy metal alloy. The results show that the mechanical properties of recycling tungsten heavy alloys are nearly the same to that of the alloy produced by pure metal elements mixed powder. The density of recycling tungsten alloy increases first and then decreases with the increasing sintering temperature. The maximum density is 17.12 g/cm^3. Hardness decreases with the increasing sintering temperature. The tensile strength and elongation get the best match when the sintering temperature is 1 440 ℃, the tensile strength is 922.95 MPa, and the elongation is 20.18%. After vacuum heat treatment, the mechanical properties of recycling tungsten alloy improve. The tensile strength increases about 6.44%, and the elongation increases about (43.42%.)