石力開1, 張濟(jì)山2, 夏芧栗2
( 1. 北京有色金屬研究總院 國(guó)家有色金屬?gòu)?fù)合材料中心， 北京 100088;
2. 北京科技大學(xué) 國(guó)家新金屬材料重點(diǎn)實(shí)驗(yàn)室， 北京 100083)
摘 要: 研究了噴射成形CuCr25合金沉積坯件的致密化處理工藝及其在860~1070℃保溫1h后的組織演變， 確定了熱變形加工溫度， 研究了熱鍛壓和熱等靜壓后材料的組織、致密化以及電導(dǎo)率、 密度、 硬度等觸頭材料常規(guī)性能。 結(jié)果表明： 在1070℃保溫1h， 觸頭材料未發(fā)生熔化， 組織略微長(zhǎng)大， 但在正常范圍內(nèi)，經(jīng)熱鍛壓和熱等靜壓處理后可實(shí)現(xiàn)致密化。 這種先進(jìn)工藝制備的新型觸頭材料具有良好的性能。
關(guān)鍵字: 噴射成形； 熱等靜壓； 致密化處理； 觸頭材料
（ 1. National Engineering & Technology Research Center for Nonferrous MMCs,
Beijing General Research Institute for Nonferrous Metals, Beijing 100088, China;
2. State Key Laboratory for Advanced Metals and Materials,
University of Science and Technology Beijing 100083, China）
Abstract: The densification process of CuCr25 alloy contact materials prepared by spray forming process were studied. The microstructures of the samples kept at different temperatures for 1h and after hot forging and HIP(hot isostatic pressing) were investigated. The properties of the CuCr 25 alloy after hot-forging and HIP were analyzed too. The results show that kept at 1070℃ for 1h, the contact materials will not melt again, and the grains increase little in size, but can be accepted. After hot forging pressing and hot isostatic pressing, the density can be improved. Meanwhile, the new contact materials prepared through spray forming process have well properties.
Key words: spray forming; hot isostatic pressing(HIP); densification; contact materials
