擴孔器鉆(zhan)(zhan)(zhan)頭(tou)(tou)的制造1. 無(wu)壓(ya)(ya)(ya)浸(jin)漬法 無(wu)壓(ya)(ya)(ya)浸(jin)漬法主(zhu)要(yao)用于(yu)制造表(biao)鑲金(jin)(jin)(jin)(jin)剛石(shi)(shi)(shi)鉆(zhan)(zhan)(zhan)頭(tou)(tou)和聚晶(jing)體鉆(zhan)(zhan)(zhan)頭(tou)(tou)。先將金(jin)(jin)(jin)(jin)剛石(shi)(shi)(shi)按設計要(yao)求擺(bai)放入石(shi)(shi)(shi)墨模具(ju)上預先準備的坑(keng)內，再把骨(gu)(gu)架(jia)金(jin)(jin)(jin)(jin)屬(shu)(shu)放入模槽，并安放鉆(zhan)(zhan)(zhan)頭(tou)(tou)鋼體。裝模后輕(qing)輕(qing)敲擊模壁(bi)使骨(gu)(gu)架(jia)粉末密實。最后把粘結(jie)金(jin)(jin)(jin)(jin)屬(shu)(shu)碎(sui)片(pian)放于(yu)模心之內，上面(mian)撒(sa)上助熔(rong)劑和保溫(wen)(wen)砂，即(ji)可(ke)放入馬弗(fu)爐(lu)中加熱燒結(jie)。當溫(wen)(wen)度達1 100°C時，粘結(jie)金(jin)(jin)(jin)(jin)屬(shu)(shu)熔(rong)化，很快滲入骨(gu)(gu)架(jia)金(jin)(jin)(jin)(jin)屬(shu)(shu)之中，形成(cheng)有硬質點的胎(tai)體，把金(jin)(jin)(jin)(jin)剛石(shi)(shi)(shi)與鉆(zhan)(zhan)(zhan)頭(tou)(tou)鋼體粘結(jie)在(zai)一起，便制成(cheng)了表(biao)鑲金(jin)(jin)(jin)(jin)剛石(shi)(shi)(shi)鉆(zhan)(zhan)(zhan)頭(tou)(tou)。金(jin)(jin)(jin)(jin)剛石(shi)(shi)(shi)擴孔器也可(ke)采用該方法來制造。2. 熱壓(ya)(ya)(ya)法 熱壓(ya)(ya)(ya)法主(zhu)要(yao)用于(yu)制造孕鑲金(jin)(jin)(jin)(jin)剛石(shi)(shi)(shi)鉆(zhan)(zhan)(zhan)頭(tou)(tou)。先
