Mhando Itsva dzeCemented Carbide

1. Zviyo zvakanaka uye ultra-fine grain carbide

Mushure mekunatswa kwezviyo zvesimende carbide, ukuru hwesimende chikamu checarbide chinova chidiki, uye chikamu chekubatanidza chinowedzera kugovaniswa kutenderedza simende chikamu che carbide, chinogona kuvandudza kuoma uye kupfeka kuramba kwecemented carbide. Asi simba rekukotama radzikira. Simba rekukotama rinogona kuvandudzwa nekuwedzera zvirimo zvecobalt mubinder zvakakodzera. Saizi yezviyo: yakajairika giredhi chishandiso alloys YT15, YG6, nezvimwewo zviyo zvepakati, avhareji saizi yezviyo i2 ~ 3μm；tiye avhareji saizi yezviyo alloy yakatsetseka i1.5 ~ 2μm, uye iyo yemicron zviyo carbide i1.0 ~ 1.3μm. Submicrograin carbide iri 0.6 ~ 0.9μm；tiye Ultra-yakanaka crystal carbide iri 0.4 ~ 0.5μm; Iyo nano-yakatevedzana microcrystalline carbide ndeye 0.1 ~ 0.3μm; Maturusi eChina ekucheka maturusi asvika padanho rezviyo zvakanaka uyesub-finezviyo.

2.TiC base carbide

TiC semuviri mukuru, inoverengera kupfuura 60% kusvika 80%, ine Ni ~ Mo sebhainda, uye kuwedzera diki yemamwe carbides eiyo alloy, isina kana zvishoma WC. Kana ichienzaniswa neWC base alloy, TiC ine yakanyanya kuoma mucarbide, saka kuomarara kwealloy kwakakwira seHRA90 ~ 94, zvakare ine yakanyanya kupfeka kuramba, anti-crescentless kupfeka kugona, kupisa kupisa, oxidation kuramba uye kugadzikana kwemakemikari, uye hukama neiyo workpiece zvinhu idiki, iyo friction factor idiki, iyo adhesion kuramba yakasimba, iyo chishandiso durability yakakwira kakawanda kupfuura WC, saka inogona kugadzirwa simbi nesimbi yakakandwa. Kuenzaniswa neYT30, kuoma kweYN10 kuri padyo, kusimba uye kupinza kwakanaka, uye inogona kutsiva YT30. Asi simba rekukotama harina kusvika kuWC, rinonyanya kushandiswa kupedzisa uye semi-kupedzisa. Nekuda kwekusagadzikana kwayo kupikisa kwepurasitiki deformation uye kudonha kumucheto, haina kukodzera kucheka kunorema uye kucheka kwepakati.

3.Cemented carbide ine zvisingawanzo zvinhu zvepasi zvakawedzerwa

Rare Earth cemented carbide iri mumhando dzakasiyana-siyana dzakasimwa carbide zvishandiso, ichiwedzera huwandu hushoma hwepasi zvisingawanzo zvinhu (nhamba dzeatomu muperiodic tafura yemakemikari zvinhu 57-71 (kubva kuLa kuenda kuLu), kuwedzera 21 uye 39 (Sc uye Y) maelement, huwandu hwezvikamu gumi nenomwe), zvisingawanzo zvinhu zvepasi zviripo mu (W, Ti) C kana (W, Ti, Ta, Nb)C mhinduro yakasimba. Inogona kusimbisa chikamu chakaoma, kudzivisa kusaenzana kwekukura kwezviyo zveWC uye kuita kuti zvive zvakafanana, uye kukura kwezviyo kunoderedzwa. Huwandu hushoma hwezvinhu zvisingawanzo pasi zvakare zvakanyungudika zvakasimba muchikamu chekubatanidza Co, icho chinosimbisa chikamu chekubatanidza uye chinoita kuti chimiro chiwedzere kuomarara. Zvisikwa zvisingawanzo zvinhu zvepasi zvakafumiswa pakusangana kweWC/Co uye pakati peiyo interface ye (W, Ti) C, (W, Ti) C, nezvimwewo, uye kazhinji inosanganiswa netsvina S, O, nezvimwewo, kugadzira makomisheni akadai. seRE2O2S, iyo inovandudza kuchena kweiyo interface uye inosimudzira kunyorova kwechikamu chakaoma uye chikamu chakasungwa. Nekuda kweizvozvo, iko kuomarara kwesimba, kubhenda simba uye kupikisa kweiyo isingawanzo pasi simende carbide yakavandudzwa zvakanyanya. Tembiricha yaro yekamuri uye kuoma kwekushisa kwakanyanya, kupfeka kuramba uye kugona kwe-anti-diffusion uye anti-oxidation pamusoro pechishandiso zvakare yakagadziridzwa. Munguva yekucheka, iyo cobalt-yakapfuma phenomenon yepasi isingawanzo cemented carbide blade inogona kunyatso kudzikisa friction factor pakati pechip, workpiece uye chishandiso, uye kuderedza simba rekucheka. Nokudaro, iyo mechanical properties uye yekucheka zvinhu zvinobudirira kuvandudzwa. China yakapfuma mune isingawanzo pasi element zviwanikwa, uye kutsvagisa uye kusimudzira isingawanzo pasi cemented carbide iri pamberi pedzimwe nyika. P, M, K alloys akagadzirwa kuti awedzere zvisingawanzo pasi mamakisi.

4.Yakaputirwa necemented carbide

Due kune kuoma uye kupfeka kuramba kwecemented carbide kwakanaka, kuomarara kwakashata, kuburikidza nemakemikari vapor deposition (CVD) nedzimwe nzira, pamusoro peiyo simende carbide yakavharwa nedhiri (5 ~ 12μm) yehukukutu hwakanaka, kukwirira kupfeka kuramba. yechinhu (TiC, TiN, Al2O3), kuumbwa kwekasimende yakavharidzirwa, kuitira kuti ive nehupamhi hwepamusoro uye hurefu hwekupfeka kwepamusoro, uye matrix akasimba; Naizvozvo, inogona kuvandudza hupenyu hwechishandiso nekugadzirisa kushanda zvakanaka, kuderedza simba rekucheka uye tembiricha yekucheka, kuvandudza mhando yemuchina wakagadzirwa, uye kuvandudza zvakanyanya kusimba kwechishandiso panguva imwechete yekucheka. Mumakore makumi maviri apfuura, mapanga akavharidzirwa ecarbide akagadzirwa zvikuru, uye akaverengera kupfuura 50% kusvika 60% yeindex-inokwanisazvishandiso munyika dzepamusoro maindasitiri. Mashizha akavharidzirwa anonyatsokodzera kuenderera mberi achitendeuka uye anoshandiswa kupedzisa, semi-kupedzisa uye kureruka mutoro roughing dzakasiyana siyana kabhoni structural simbi, alloy structural simbi (kusanganisira normalizing uye kudzikama), nyore kucheka simbi, mudziyo simbi, martensitic Stainless simbi uye grey cast. iron.

5. Graded carbide

Carbide mune zvimwe zviitiko, mukuwedzera kune chinodiwa chakanyanya kuoma kwepamusoro uye kupfeka kuramba, asi zvakare inoda kuve neakanaka maitiro kuomarara. Zvakajairwa cemented carbide kuoma uye kusimba, kuomarara uye kupfeka kuramba pakati pezvipingamupinyi zvinowirirana, izvo zviviri hazvigone kuve zvese. Iyo inoshanda gradient zvinhu inogadzirisa matambudziko ari pamusoro aripo mune simende carbide, alloys akadaro anoratidza kugoverwa kwe gradient yeCo muchimiro, ndiko kuti, iyo yekunze layer yealloy yakadzikira pane yezita Co yemukati yealloy cobalt-varombo layer, iyo yepakati layer yakakwira kupfuura iyo inonzi Co yemukati yealloy cobalt-rich layer, uye musimboti ndeye WC-Co-η matatu-chikamu microstructure. Nekuda kweiyo yakakwira WC yemukati pamusoro, ine yakanyanya kuoma uye yakanaka kupfeka kuramba; chikamu chepakati chine Co content uye yakanaka kuoma. Naizvozvo, hupenyu hwayo hwesevhisi ndeye 3 kusvika ku5 nguva yeiyo yakafanana yechinyakare simende carbide, uye kuumbwa kweimwe neimwe layer inogona kugadziriswa zvinoenderana nezvinodiwa.

To sum up，kuburikidza nekupatsanurwa uye kukwenenzverwa kwecemented carbide, tinogona kuona kuti rudzi rutsva rwecemented carbide tool yakagadziridzwa zvakanyanya kune yechinyakare chishandiso, kune rumwe rutivi, kushandiswa kwezvidimbu zvakatsetseka uye Ultra-yakatsetseka zvimedu zvecemented carbide, ine. kusanganiswa kwakakwana kwekuoma uye simba. Uye zvakare, maitiro matsva akadai sekumanikidza sintering anogona kuwedzera kunaka kwemukati wecemented carbide. Nekune rimwe divi, chishandiso chepasirese chakagadziridzwa nemhando yepamusoro-chaiyo inosanganisirwa carbide chishandiso chinoita kukurumidza kucheka, kucheka kunyatsoshanda uye hupenyu hwematurusi zvakapetwa kakawanda kupfuura iyo yesimbi inomhanya. Kugadzirwa kwezvishandiso zvitsva izvi kuchazadza hurema hwesimende carbide. Iko kuvandudzwa kwecarbide zvishandiso zvekushandisa, kuitira kuti kubva kune yakasarudzika mashandisiro mukuita kwekuwedzera kwekuvandudzwa kwechizvino-chishandiso tekinoroji mune inopindirana mabhenefiti emidziyo, zvinhu zvekutsiva iyo yekuwedzera. Rega ishandiswe kune yakakwirira uye yakafara yakawanda yekucheka minda. 

Ndinovimba chinyorwa ichi chinogona kukubatsira iwe kuti unzwisise zviri nani simende carbide kusvika pamwero wakati. Kunze kweichi, ndapota verenga chikamu chekutanga che“Kupatsanura uye Kudzidza pane Cemented Carbide Kucheka Zvishandiso”. Bata isu kana uine chero mubvunzo kana chinodiwa nezve carbide zvigadzirwa.