Manufacturing txheej txheem ntawm carbide inserts

Cov txheej txheem tsim cov cemented carbide hniav tsis zoo li casting lossis hlau, uas yog tsim los ntawm melting ore thiab ces txhaj rau hauv pwm, los yog tsim los ntawm forging, tab sis carbide hmoov (tungsten carbide hmoov, titanium carbide hmoov, tantalum carbide hmoov) uas yuav tsuas yaj thaum nws nce mus txog 3000 ° C lossis siab dua. hmoov, thiab lwm yam) rhuab mus rau ntau tshaj 1,000 degrees Celsius kom nws sintered. Ua kom cov carbide daim ntawv cog lus muaj zog, cobalt hmoov yog siv los ua tus neeg sawv cev sib txuas. Nyob rau hauv qhov kev txiav txim ntawm qhov kub thiab txias siab, lub affinity ntawm carbide thiab cobalt hmoov yuav txhim kho, kom nws yuav maj mam tsim. Qhov tshwm sim no hu ua sintering. Vim tias hmoov siv, txoj kev no hu ua hmoov metallurgy.

Raws li cov txheej txheem tsim khoom sib txawv ntawm cov cemented Carbide Inserts, qhov loj ntawm txhua feem ntawm cemented carbide inserts txawv, thiab kev ua tau zoo ntawm cov cemented carbide inserts kuj txawv.

Sintering yog ua tom qab tsim. Cov hauv qab no yog tag nrho cov txheej txheem ntawm sintering txheej txheem:

1) Nias cov hmoov zoo heev crushed tungsten carbide hmoov thiab cobalt hmoov raws li qhov yuav tsum tau ua. Lub sijhawm no, cov khoom siv hlau txuas nrog rau ib leeg, tab sis kev sib xyaw ua ke tsis nruj heev, thiab lawv yuav raug crushed nrog me ntsis quab yuam.

2) Raws li qhov kub ntawm qhov tsim cov hmoov thaiv cov khoom nce, qhov kev sib txuas yog maj mam ntxiv zog. Ntawm 700-800 ° C, kev sib xyaw ua ke ntawm cov khoom tseem yog qhov tsis yooj yim, thiab tseem muaj ntau qhov sib txawv ntawm cov khoom, uas tuaj yeem pom txhua qhov chaw. Cov voids no hu ua voids.

3) Thaum cov cua kub kub nce mus txog 900 ~ 1000 ° C, cov voids ntawm cov khoom txo qis, qhov linear dub yuav luag ploj, thiab tsuas yog cov dub loj tseem nyob.

4) Thaum qhov kub thiab txias maj mam nce mus txog 1100 ~ 1300 ° C (uas yog, qhov kub ib txwm sintering), cov voids tau txo qis dua, thiab kev sib txuas ntawm cov khoom yuav muaj zog dua.

5) Thaum cov txheej txheem sintering tiav, cov tungsten carbide hais nyob rau hauv cov hniav yog cov polygons me me, thiab cov khoom dawb tuaj yeem pom nyob ib puag ncig lawv, uas yog cobalt. Lub sintered hniav qauv yog raws li cobalt thiab them nrog tungsten carbide hais. Qhov loj thiab cov duab ntawm cov khoom thiab cov tuab ntawm cobalt txheej sib txawv heev nyob rau hauv cov khoom ntawm carbide inserts.