Lub luag haujlwm ntawm tooj liab hmoov hauv cov cuab yeej pob zeb diamond

Lub luag haujlwm ntawm tooj liab hmoov hauv cov cuab yeej pob zeb diamond
Copper hmoov yog ib qho tseem ceeb ntawm cov cuab yeej pob zeb diamond matrices. Feem ntau ua ke nrog hlau, tin, cobalt, thiab npib tsib xee hmoov, nws yog dav siv nyob rau hauv kub - pressed sintered cov cuab yeej - xws li hlau -bonded abrasive blocks (piv txwv li, "cib" thiab "horseshoe" hom) thiab pob zeb laum ntu - ua hauj lwm raws li kev sib tw, kev coj tus cwj pwm nyuaj thermal conductivity.

(Copper Hmoov)

 

 

1. Kev tsim cov kua theem kom qis sintering kub
tooj liab thiab tin tau yooj yim tsim ib qho qis - melting- taw tes bronze kua theem (ntawm qhov kub siab tshaj ntawm cov tooj liab ntshiab). Cov txheej txheem ua kua no tsim nyob rau hauv tus qauv kub- nias ntau ntawm 750-830 degree, ntub cov khoom hlau thiab pob zeb diamond nto thaum sau cov inter-particle voids. This significantly increases matrix density, strengthens metallurgical bonding between particles, and allows for lower sintering pressures and temperatures, thereby reducing diamond damage caused by high-temperature graphitization.

2. Optimizing matrix toughness thiab tus kheej -ntse kev ua tau zoo
Ntshiab tooj liab muaj zoo heev plasticity thiab toughness. Ua kom cov tooj liab hmoov cov ntsiab lus softens lub matrix thiab txhim khu nws plasticity. Thaum lub sij hawm sib tsoo, lub matrix hnav zoo, tsis tu ncua thiab systematically nthuav tawm cov pob zeb diamond tshiab; qhov no tiv thaiv qhov chaw ua hauj lwm los ntawm polished los yog slipping, yog li no ho txhim kho tus kheej - sharpening kev ua tau zoo.
Daim ntawv thov kom pom tseeb: Siab- cov qauv tooj liab feem ntau yog siv rau cov pob zeb abrasive tsim rau cov pob zeb mos, xws li marble, pob zeb khoom kim heev, thiab cov limestone mos.

 

3. Cov thermal conductivity zoo heev rau kev ua kom sov zoo thiab tiv thaiv thermal puas
Copper lub thermal conductivity yog deb tshaj ntawm cov hlau. Cov tooj liab tivthaiv nyob rau hauv lub matrix sai dissipates tshav kub generated los ntawm kev sib tsoo kev sib txhuam, txo lub zos kub ntawm pob zeb diamond hais. Qhov no txo ​​cov pob zeb diamond passivation thiab graphitization los ntawm kev kub siab, ua rau nws tsim nyog rau kev ua haujlwm tas mus li, ntev - sijhawm ua haujlwm.

 

4. Txo cov xeb xeb; haum rau lub teeb -xim pob zeb
Tooj liab tsis tau yooj yim oxidize los ua tawv, reddish -xim av oxides. Piv nrog rau siab - hlau formulations, cov khib nyiab hnav los ntawm siab - tooj liab matrices yog tsawg dua yuav ua rau daj xeb stains rau ntawm qhov chaw ntawm marble los yog lub teeb - xim zoo nkauj pob zeb slabs. Qhov no khaws cov pob zeb zoo nkauj zoo nkauj, ua rau nws yog ib qho tseem ceeb ntawm kev tsim lub tswv yim rau consumables siv rau lub teeb -xim pob zeb.

 

5. Txhim khu lub wettability ntawm matrix rau pob zeb diamond
Kua-theem tooj liab tsim thaum lub sij hawm sintering zoo ntub lub pob zeb diamond nto. Thaum ua ke nrog titanium-pob zeb diamond coated, nws ntxiv txhim kho kev sib txuas ntawm lub ntsej muag, pab ua kom lub matrix tuav lub zog ntawm cov pob zeb diamond, thiab txo qis tag nrho ntxov ntxov - nplej rub- tawm.

 

xav tau ib tug balanced formulation
1 Tsawg hardness thiab hnav tsis kam
Tooj yog inherently mos; Cov ntsiab lus tooj liab ntau dhau txo cov matrix qhov hnav tsis kam, ua kom cov matrix noj, thiab ua kom lub cuab yeej ua haujlwm tag nrho. Nws yog qhov tsis tsim nyog rau kev ua haujlwm siab - cov ntaub ntawv hardness xws li siab -quartz granite lossis C60 siab - lub zog pob zeb.

2 Cov kua dej ntau dhau ua rau "cov khoom ntws" thiab "sib cais"
Yog hais tias tooj liab thiab tin cov ntsiab lus siab dhau lawm, ntau tshaj ntawm cov kua theem cov ntaub ntawv thaum sintering. Nyob rau hauv lub siab, qhov no ua rau cov kua dej ntws thiab kev sib cais sib cais, ua rau tsis sib xws ntawm qhov sib tsoo ntawm sab saum toj thiab hauv qab ntawm cov khoom sib tsoo, cov khoom tsis sib xws, thiab cov qauv tsis sib xws thaum siv.

 

3 Tsis txaus siab - qhov kub thiab txias
Nyob rau hauv tej yam kev mob ntawm sustained siab -kub thiab hnyav- load sib tsoo, siab - tooj liab matrices yog prone rau yas deformation. Qhov chaw ua hauj lwm hnav sai heev, ua rau lawv tsis tuaj yeem tiv taus qhov muaj zog cuam tshuam nrog thaum sib tsoo coarse rebar lossis nyuaj aggregates.

 

 

1. Electrolytic tooj liab hmoov: Dendritic zoo nrog ib tug ntxhib nto; muaj zog particle interlocking, zoo heev formability, thiab siab sintering kev ua. Nws yog hom feem ntau siv rau pob zeb sib tsoo ntu hauv Suav teb. Nws drawbacks muaj xws li tsis zoo flowability thiab mediocre uniformity thaum tsis siv neeg pwm filling.
2. Atomized tooj liab hmoov: Nyob ze - cov duab kheej kheej nrog zoo flowability; haum rau huab hwm coj ntau lawm ntawm automated presses. Txawm li cas los xij, nws muaj kev ua haujlwm qis dua sintering, ua rau me ntsis qis matrix ntom piv rau electrolytic tooj liab nyob rau hauv zoo tib yam.

 

 

• Sib tsoo ntu rau pob zeb zoo nkauj, marble, thiab pob zeb mos: Siab- tooj liab, qis- cov mis hlau; tsim los rau tus kheej -ntxhiab, khawb- ua haujlwm dawb, thiab xeb- tiv thaiv stain.
• Coarse sib tsoo ntu rau granite (hlau-bonded): Cov ntsiab lus tooj liab; sib npaug nrog hlau hmoov los txhim kho kev lag luam -tawm ntawm hnav tsis kam thiab sharpness.
• Laum cov hniav rau cov cuab yeej siv pob zeb thiab cov pob zeb nyuaj: Txo cov tooj liab nrog cov ntsiab lus cobalt thiab hlau ntxiv; tsim los txhim kho matrix hardness, hnav tsis kam, thiab cuam tshuam tsis kam.
• Bronze-raws li system (Cu-Sn): Classic soft-matrix puag formula; feem ntau siv los ua ib lub hauv paus rau kev hloov kho.

 

Cov ntsiab lus luv luv
Tus nqi tseem ceeb ntawm cov hmoov tooj liab: Ua kom cov kua dej-theem sintering, txhim khu lub zog thiab nws tus kheej-sharpening, txhim kho cua sov dissipation, thiab tiv thaiv xeb staining ntawm pob zeb.

Qhov zoo: Zoo toughness, yooj yim ntawm sintering, thiab zoo heev thermal conductivity. Drawbacks: Tsis txaus hnav tsis kam; Kev siv ntau dhau tuaj yeem ua rau lub neej luv luv. Lub hauv paus ntawm cov qauv tsim nyob rau hauv kev siv tooj liab los kho matrix softness thaum sib txuas nrog hlau thiab cobalt kom sib npaug "ntse" thiab "kev pabcuam lub neej."