摘要 為探索釬焊技術(shù)在地質(zhì)金剛石鉆頭制造中的應(yīng)用，本文在分析與比較釬焊法、電鍍法和熱壓法 各自優(yōu)缺點的基礎(chǔ)上，介紹了釬焊金剛石鉆頭的制作工藝，并采用Ni—Cr合金釬料制作了,Φ35 mm、Φ50mm、Φ70mm三種規(guī)格的薄壁鉆頭；對試制的鉆頭進(jìn)行了室內(nèi)鉆進(jìn)試驗，鉆進(jìn)材料為混凝土、鋼筋混凝土和花崗巖。試驗發(fā)現(xiàn)，燒結(jié)溫度和釬焊材料中添加劑的成分與含量對金剛石鉆頭的性能有著非常重要的影響，燒結(jié)溫度為980oC時鉆頭的性能最好，加入低熔點的Cu合金可以明顯改善釬料與基體的浸潤性。鉆進(jìn)結(jié)果表明：釬焊地質(zhì)金剛石鉆頭具有金剛石出刃高，鉆進(jìn)時效好，壽命長等優(yōu)點，該技術(shù)在金剛石鉆頭領(lǐng)域的開發(fā)與運(yùn)用中具有重要的意義。(金剛石與磨料磨具工程2009年第一期)
　　
　　Abstract In order to explore the application of brazing technology in the manufacture of diamond bit．fabrication technology of brazed diamond bit was introduced in this paper on the base of analyzing advantages and disadvantages of brazing，electroplating and hot—pressing method respectively．Three types of thin wall diamond bits were manufactured with Ni-Cr brazing filler． A laboratory drilling test was carried out on those new monolayer diamond bits．The drilling materials were concrete，reinforced concrete and granite．The tesI results showed that sintering temperature，composition and content of solder additive played an important role in the performances of diamond bit；A diamond bit had the best performance when it was sintered at 9 80 oC：some additional low melting point metals such as Cu alloy can improve the wettabilitv between diamond and matrix obviously．The drilling test results indicated that brazed diamond bit had superiorities of good diamond exposure，better sharpness and longer lifespan compared with the two conventional kinds．a(chǎn)nd it meant this brazing technology used in the development and application of diamond bit had important significance.