Kupisa uye kubviswa kwecobalt yePDC

I. Kupera kwekupisa uye kubviswa kwecobalt yePDC

Mukushanda kwePDC pakusviba kwemhepo ine simba guru, cobalt inoshanda senzira yekukurudzira kusanganiswa kwedhaimani nedhaimani zvakananga, uye inoita kuti dhaimani netungsten carbide matrix zvive zvese, zvichiita kuti mazino ekucheka ePDC akakodzera kucherwa kwemafuta munzvimbo ine simba uye kuramba kupfeka zvakanaka.

Kudzivirira kupisa kwemadhaimani kwakadzikira. Kana dhaimani iri mumhepo, pamusoro pedhaimani inogona kushanduka patembiricha inosvika 900℃ kana kupfuura. Pakushandiswa, maPDC echinyakare anowanzo donha pa750℃. Pakunoboora matombo akaomarara uye anokwesha, maPDC anogona kusvika patembiricha iyi zviri nyore nekuda kwekupisa kunokweshana, uye tembiricha yekukurumidza (kureva, tembiricha yemunzvimbo imwe chete padanho re microscopic) inogona kutowedzera, ichipfuura nzvimbo yekunyunguduka kwecobalt (1495°C).

Kana tichienzanisa nedhaimani chaiyo, nekuda kwekuvapo kwecobalt, dhaimani inoshanduka kuita graphite patembiricha yakaderera. Nekuda kweizvozvo, kupera kwedhaimani kunokonzerwa negraphitization inokonzerwa nekupisa kwenzvimbo. Pamusoro pezvo, coefficient yekuwedzera kwecobalt yakakwira zvakanyanya kupfuura yedhaimani, saka panguva yekupisa, kubatana pakati pedhaimani kunogona kukanganiswa nekuwedzera kwecobalt.

Muna 1983, vaongorori vaviri vakabvisa madhaimani pamusoro pemadhaimani akajairwa ePDC, zvichiwedzera kushanda kwemazino ePDC. Zvisinei, chigadzirwa ichi hachina kuwana kutarisirwa kwachaifanirwa. Zvakatora makore 2000 kuti, nekunzwisisa kwakadzama kwemadhaimani ePDC, vatengesi vezvibooreso vakatanga kushandisa tekinoroji iyi kumazino ePDC anoshandiswa pakuboorera matombo. Mazino anobatwa nenzira iyi akakodzera kuumbwa kwakanyanya kwemazino ane kupisa kwakanyanya uye anowanzozivikanwa semazino "akabviswa cobalti".

Iyo inonzi "de-cobalt" inogadzirwa nenzira yechinyakare yekugadzira PDC, uye pamusoro pedhaimani rayo panonyudzwa muasidhi yakasimba kubvisa cobalt phase kuburikidza ne acid etching process. Kudzika kwekubvisa cobalt kunogona kusvika ma microns angangoita mazana maviri.

Kuedzwa kwekupfeka kwakasimba kwakaitwa pamazino maviri akafanana ePDC (rimwe rawo rakanga rabviswa cobalt pamusoro pedhaimani). Mushure mekucheka 5000m yegranite, zvakaonekwa kuti mwero wekupfeka wePDC isina kubviswa cobalt wakatanga kuwedzera zvakanyanya. Kusiyana neizvi, PDC yakabviswa cobalt yakaramba ichikurumidza kucheka uku ichicheka matombo angangoita 15000m.

2. Nzira yekuona PDC

Kune nzira mbiri dzekuongorora mazino ePDC, dzinoti kuyedza kunoparadza uye kuyedza kusingaparadze.

1. Kuedza kunoparadza

Miedzo iyi yakagadzirirwa kutevedzera mamiriro emugomba uri pasi sezvinobvira kuti iongorore mashandiro ekucheka mazino mumamiriro ezvinhu akadaro. Mhando mbiri huru dzekuedza kunoparadza ndedzekuyedza kusapfeka uye bvunzo dzekudzivirira kukuvadzwa.

(1) Bvunzo rekudzivirira kupfeka

Mhando nhatu dzemidziyo dzinoshandiswa kuita bvunzo dzekudzivirira kusakara kwePDC:

A. Lathe yakatwasuka (VTL)

Munguva yekuedza, tanga wagadzirisa PDC bit kune VTL lathe woisa sampuro yedombo (kazhinji granite) padivi pePDC bit. Wobva watenderedza sampuro yedombo uchitenderedza lathe axis nekumhanya kwakati. PDC bit inocheka musampuli yedombo ine kudzika kwakati. Paunoshandisa granite pakuedza, kudzika uku kwekucheka kunowanzova pasi pe1 mm. Kuedza uku kunogona kunge kwakaoma kana kunyorova. Mu "kuyedza kwakaoma kweVTL," kana PDC bit ikacheka nepadombo, hapana kutonhora kunoshandiswa; kupisa kwese kunokonzerwa kunopinda muPDC, kuchikurumidzisa maitiro egraphitization yedhaimani. Iyi nzira yekuedza inopa mhedzisiro yakanaka pakuongorora PDC bits mumamiriro ezvinhu anoda kudzvanywa kwakanyanya kana kumhanya kwakati.

"Kuedza kweVTL kwakanyorova" kunoona hupenyu hwePDC mumamiriro ekupisa ari pakati nepakati nekutonhodza mazino ePDC nemvura kana mhepo panguva yekuedzwa. Saka, chinhu chikuru chinobva pakupwanyika kwebvunzo iyi kukuya kwedombo kwete chinhu chinodziisa.

B, lathe yakatambanudzwa

Bvunzo iyi inoitwawo negranite, uye musimboti webvunzo iyi wakafanana neVTL. Nguva yebvunzo iyi ingori maminetsi mashoma, uye kupisa pakati pemazino egranite nePDC kwakaganhurirwa.

Maparamita ekuyedza granite anoshandiswa nevatengesi vezvishandiso zvePDC anosiyana. Semuenzaniso, maparamita ekuyedza anoshandiswa neSynthetic Corporation neDI Company muUnited States haana kufanana, asi anoshandisa granite yakafanana pakuyedza kwavo, dombo rakasimba kusvika repakati rine porosity shoma uye simba rekumanikidza re190MPa.

C. Chishandiso chekuyera chiyero cheAbrasion

Pasi pemamiriro ezvinhu akatarwa, dhaimani rePDC rinoshandiswa kuchekerera vhiri rekukuya resilicon carbide, uye chiyero chehuwandu hwekusakara kwevhiri rekukuya uye huwandu hwekusakara kwePDC zvinotorwa sechiratidzo chekusakara kwePDC, icho chinonzi chiyero chekusakara.

(2) Kuedzwa kwekurapwa kwesimba remagetsi

Nzira yekuedza kukanganiswa inosanganisira kuisa mazino ePDC pakona ye15-25 degrees wobva wadonhedza chinhu kubva pakakwirira kuti urove dhaimani pamazino ePDC wakamira. Kurema nekukwirira kwechinhu chinodonha zvinoratidza huwandu hwesimba rekukuvara hunowanikwa nezino rekuyedza, iro rinogona kuwedzera zvishoma nezvishoma kusvika pa100 joules. Zino rega rega rinogona kukanganiswa ka3-7 kusvika risisakwanise kuongororwazve. Kazhinji, sampuli gumi dzemhando yega yega yezino dzinoongororwa padanho rega rega resimba. Sezvo paine huwandu hwekusagona kwemazino kukanganiswa, mhedzisiro yekuedzwa padanho rega rega resimba ndiyo avhareji yenzvimbo yedhaimani inodonha mushure mekukanganiswa kwezino rega rega.

2. Kuedza kusingakuvadzi

Nzira inonyanya kushandiswa yekuedza isingaparadze (kunze kwekutarisa nekuona uye nemaikorosikopu) ndeye ultrasound scanning (Cscan).

Tekinoroji yekuskena C inogona kuona zvikanganiso zvidiki uye kuona nzvimbo nehukuru hwezvikanganiso. Paunenge uchiita bvunzo iyi, tanga waisa zino rePDC mutangi remvura, wobva waskena uchishandisa ultrasound probe;

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