( 中南大學(xué) 粉末冶金國(guó)家重點(diǎn)實(shí)驗(yàn)室, 長(zhǎng)沙 410083)
摘 要: 采用氧化-還原法回收鎢合金切削廢料，用回收粉末及鎳、鐵元素粉配制成91W-6Ni-3Fe系高密度合金的混合粉，經(jīng)壓制、脫膠、燒結(jié)制得再生高密度鎢合金。結(jié)果表明：所得再生合金的性能同非回收粉末所制備的合金性能相當(dāng)，再生鎢合金的密度隨著燒結(jié)溫度的升高而先升高后有所降低，最大密度為17.12 g/cm3，硬度隨著燒結(jié)溫度的升高而降低；當(dāng)燒結(jié)溫度為1 440 ℃時(shí)再生合金的強(qiáng)度和塑性達(dá)到較好的配合，抗拉強(qiáng)度為922.95 MPa, 延伸率為20.18%；經(jīng)真空熱處理后，再生鎢合金性能得到改善，抗拉強(qiáng)度和延伸率得到不同程度的提高，抗拉強(qiáng)度比熱處理前提高了約6.44%，延伸率比熱處理前提高了約43.42%。
關(guān)鍵字: 再生；高密度； 鎢合金
CHEN Li-bao, HUANG Bai-yun
（ State Key Laboratory of Powder Metallurgy,
Central South University, Changsha 410083, China）
Abstract: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/cm3. 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%.
Key words: recycling; high density；tungsten alloy
