(1. 中南大學(xué) 地球科學(xué)與信息物理學(xué)院，長沙 410083；
2. 中南大學(xué) 有色金屬成礦預(yù)測與地質(zhì)環(huán)境監(jiān)測教育部重點實驗室，長沙 410083)
摘 要: 通過多金屬電解法制備FeNiCo預(yù)合金粉末，采用X射線衍射儀和掃描電子顯微鏡對預(yù)合金粉末及其燒結(jié)體進行形貌觀察和物相分析，研究FeNiCo預(yù)合金粉不同溫度燒結(jié)時燒結(jié)體的力學(xué)性能和磨損性能，并探討其在金剛石繩鋸中應(yīng)用的可行性。結(jié)果表明：制備的FeNiCo預(yù)合金粉一定程度上實現(xiàn)合金化，粉末呈不規(guī)則狀，粒度較細(xì)；FeNiCo預(yù)合金粉在800~840 ℃燒結(jié)時，燒結(jié)體硬度最大值為107.6 HRB，三點抗彎強度最大值為1638.3 MPa，致密度最大值為96.2%，磨損質(zhì)量損失為0.498~0.555 g，燒結(jié)溫度適應(yīng)性較好。采用FeNiCo預(yù)合金粉為主要胎體成分制作金剛石繩鋸鋸切硬質(zhì)石材時，切割效率為8.6 m2/h，工具壽命為11.3 m2/m，具有較好的綜合使用性能。
關(guān)鍵字: FeNiCo預(yù)合金粉；金剛石繩鋸；微觀結(jié)構(gòu)；力學(xué)性能
（1. School of Geosciences and Info-Physics, Central South University, Changsha 410083, China;
2. Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring, Ministry of Education, Central South University, Changsha 410083, China）
Abstract:The FeNiCo pre-alloyed powder was prepared by polymetallic electrolytic method. The phase composition and morphology of pre-alloyed powder and sintered body were characterized by XRD and SEM. The mechanical properties and wear loss of metal body sintered at different temperatures were tested, and the application of FeNiCo pre-alloyed powder in the diamond wire was researched. The results show that alloying is realized in the FeNiCo pre-alloyed powder to some extent, and the size of the powder is finer with irregular shape. When sintered at 800 ℃ to 840 ℃, the largest hardness of the metal body is 107.6 HRB, the largest bend strength is 1638.3 MPa, the largest relative density is 96.2%, and the wear mass loss is 0.498-0.555 g, thus with a good adaptability of sintering temperature. Using FeNiCo pre-alloyed powder as the main component of the matrix to produce diamond wire saw, it has a good comprehensive performance when cutting hard stone, the cutting efficiency is 8.6 m2/h and the tool life is 11.3 m2/m.
Key words: FeNiCo pre-alloyed powder; diamond wire saw; microstructure; mechanical property
