發(fā)布時(shí)間：2018-05-03 09:20

  本文選題：鎢銅鋅合金 + SPS��； 參考：《稀有金屬材料與工程》2017年04期

【摘要】：采用鎢粉表面化學(xué)鍍銅與SPS固相燒結(jié)2種工藝相結(jié)合的方法,制備出具有低W-W連接度特征及以黃銅作為粘結(jié)相的W-Cu-Zn合金,研究了熱處理工藝對(duì)合金組織與性能的影響。微觀分析表明所制備出的W-Cu-Zn合金中,鎢顆粒均勻分布在黃銅粘結(jié)相中,粘結(jié)相為α相Cu-Zn固溶體。熱處理后鎢與黃銅粘結(jié)相的兩相分布沒(méi)有發(fā)生變化,但力學(xué)性能變化顯著,經(jīng)870℃隨爐冷卻熱處理后,W-Cu-Zn合金硬度(HV)由1438 MPa提高至1723 MPa,準(zhǔn)靜態(tài)壓縮加載時(shí)抗斷裂強(qiáng)度由650 MPa提高至750 MPa,臨界失效應(yīng)變由0.18增大至0.26,靜態(tài)力學(xué)性能顯著提高。動(dòng)態(tài)壓縮加載時(shí)抗斷裂強(qiáng)度由710 MPa提高到900 MPa,臨界失效應(yīng)變由0.24提高到0.4,動(dòng)態(tài)力學(xué)性能顯著提高。機(jī)理分析表明,熱處理前W-Cu-Zn合金的黃銅粘結(jié)相中存在Zn元素分布不均的現(xiàn)象,經(jīng)870℃隨爐冷卻熱處理后黃銅粘結(jié)相中Zn元素分布的均勻性大幅度提高,這是合金力學(xué)性能提高的原因之一;此外,熱處理后黃銅粘結(jié)相中形成了大量細(xì)小彌散分布的Cu_3Zn析出相,起到彌散強(qiáng)化作用,這是合金的強(qiáng)度顯著提高的另一個(gè)原因。
[Abstract]:By combining electroless copper plating on tungsten powder with SPS solid state sintering, the W-Cu-Zn alloy with low W-W bonding degree and brass as bonding phase was prepared. The effect of heat treatment on the microstructure and properties of the alloy was studied. The microanalysis shows that tungsten particles are uniformly distributed in the brass bonded phase in the prepared W-Cu-Zn alloy, and the bonding phase is a 偽 phase Cu-Zn solid solution. After heat treatment, the two-phase distribution of bonding phase between tungsten and brass did not change, but the mechanical properties changed significantly. After cooling heat treatment at 870 鈩，

本文編號(hào)：1837928