Kub- xovxwm sintering tam sim no yog qhov tseem ceeb tshaj plaws thiab cov txheej txheem tseem ceeb rau kev tsim cov pob zeb diamond saw hniav, tshwj xeeb yog cov tsim los rau kev txiav pob zeb thiab pob zeb. Nws tuaj yeem nkag siab tias yog ib qho, cov txheej txheem meej sib txuas ua ke thiab casting.
1. Kev txhais cov txheej txheem kub xovxwm sintering
Kub xovxwm sintering thev naus laus zis suav nrog cov txheej txheem hmoov hlau metallurgy nyob rau hauv pob zeb diamond thiab hlau matrix cov hmoov sib xyaw ua ke rau qhov kub thiab txias thiab unidirectional mechanical siab nyob rau hauv ib qho kub xovxwm nyob rau hauv ib qho chaw tiv thaiv. Qhov sib xyaw ua ke ntawm thermal thiab mechanical action induces ceev ceev, yielding tag nrho compacted, siab -lub zog composite lub taub hau. Hauv qhov tseem ceeb, nws suav nrog 'cua sov thiab nias ib txhij kom ua tiav ib qho - kauj ruam tsim '.
2. Cov kauj ruam ntxaws ntawm cov txheej txheem kub xovxwm sintering
1) Cov khoom xyaw thiab sib tov
Matrix hmoov: Feem ntau yog tsim los ntawm ntau cov hmoov hlau. Cov ntaub ntawv ua haujlwm: tungsten, tungsten carbide, cobalt, hlau hmoov - muab hardness thiab hnav tsis kam. Binder hlau: Cobalt, npib tsib xee - pom zoo ntub dej thiab tuav cov khoom rau pob zeb diamond. Tsawg- melting- taw tes hlau: tooj liab, tin, manganese, nyiaj, thiab lwm yam - tsim cov kua theem thaum sintering los txhawb densification.
Pob zeb diamonds: Xaiv cov qib tsim nyog, qhov loj me, thiab qhov siab raws li cov khoom txiav.
Ua tib zoo muab cov hmoov matrix nrog cov pob zeb diamond uas xaiv hauv lub tshuab sib xyaw.
2) Moulding
Cov hmoov sib xyaw yog ntim rau hauv siab - zog graphite pwm. Graphite pwm tuaj yeem ua tau zoo heev -kub tsis kam, tus kheej -lubricating zog, thiab hluav taws xob conductivity.
Cov duab ntawm pwm kab noj hniav txiav txim siab qhov kawg qhov ntev thiab daim ntawv ntawm cov cuab yeej txiav.
3) Kub xovxwm Sintering
Muab tso rau hauv: Muab cov hmoov- puv pwm ntawm lub taub hau ntawm lub taub hau kub xovxwm sintering.
Kev khiav tawm lossis tiv thaiv Gas Flushing: Tshem tawm ntawm lub cub tawg los yog qhia cov roj hydrogen lossis nitrogen los tiv thaiv oxidation ntawm cov hlau thiab pob zeb diamond ntawm qhov kub siab.
Cua sov: Kub cov pwm thiab hmoov mus rau qhov kub thiab txias (feem ntau 700℃- 1000℃) los ntawm cov cua sov los ntawm cov graphite pwm nws tus kheej los yog induction cua sov. Qhov kub no tshaj qhov melting point ntawm qis -melting- taw tes hlau nyob rau hauv lub matrix tab sis tseem nyob rau hauv lub pob zeb diamond qhov kub thiab txias txwv (kev tswj nruj yog qhov tseem ceeb, txwv tsis pub pob zeb diamond graphitisation tshwm sim).
Pressurisation: Ib txhij nrog cua sov lossis thaum ncav cuag qhov ntsuas kub, unidirectional axial siab (feem ntau 10-30 MPa) yog siv rau pwm ntawm hydraulic system.
Isothermal siab tuav: Khaws cov txheej txheem ntawm qhov ntsuas kub thiab siab ua ntej rau lub sijhawm teev tseg, thaum muaj kev hloov pauv tseem ceeb tshwm sim. Cov ntaub ntawv ua kua theem, nrog qis- melting- taw tes hlau (xws li tooj liab lossis tin) liquefying los tsim cov kua hlau zaj duab xis ntim cov hmoov hmoov thiab pob zeb diamond. Nyob rau hauv lub siab thiab ua kua-theem lubrication, cov khoom uas tau hloov dua tshiab thiab densification raws li lawv swb thiab reposition, sau voids. Atomic Diffusion thiab Alloying: Cov khoom sib txawv ntawm cov hlau nplaum yaj thiab diffuse nyob rau hauv cov kua theem, tsim cov theem tshiab alloyed. Cov pob zeb diamond hais yog entrapped, nrog cov khoom molten matrix wetting thiab enveloping lawv. Thaum txias, cov txheej txheem no mechanically embeds lub pob zeb diamond thaum tsim tshuaj sib txuas (xws li, cobalt muaj zog affinity rau carbon nyob rau hauv pob zeb diamond).
4) Txias thiab demoulding
Tso cua sov thiab txias nyob rau hauv siab los yog tom qab depressurisation. Tshem tawm cov sintered densely, tsim txiav lub taub hau los ntawm pwm.
5) Kev ua haujlwm tom ntej
Tom qab kev sib tsoo thiab tu, lub taub hau txiav yog sib koom ua ke rau cov hlau substrate los ua tiav pob zeb diamond saw hniav.
