Ukukhubazeka Okujwayelekile kanye nezimbangela ze-Tungsten Carbide Sintering

I-Sintering ibhekisela enqubweni yokuguqula izinto eziyimpuphu zibe yingxubevange eminyene futhi kuyisinyathelo esibaluleke kakhulu ekukhiqizeni i-carbide enosimende. Inqubo ye-tungsten carbide sintering ingahlukaniswa ngezigaba ezine eziyisisekelo: ukususwa kwe-ejenti eyakhayo kanye nesiteji sangaphambi kwe-sintering, isigaba esiqinile sesigaba se-sintering (800 ℃ - izinga lokushisa le-eutectic), isigaba se-liquid sintering (izinga lokushisa le-eutectic - izinga lokushisa le-sintering), kanye nokupholisa. isigaba (izinga lokushisa le-sintering - izinga lokushisa legumbi). Kodwa-ke, ngenxa yokuthi inqubo ye-sintering iyinkimbinkimbi kakhulu futhi izimo zinzima, kulula ukukhiqiza amaphutha nokunciphisa izinga lemikhiqizo. Izinkinga ezivamile ze-sintering nezimbangela zazo zimi kanje:

1. Ukucwecwa

I-carbide enosimende enamaphutha okuxebuka ijwayele ukuqhuma nokuqhekeka noshoki. Isizathu esiyinhloko sokucwecwa ukuthi igesi equkethe ikhabhoni ibola ikhabhoni yamahhala, okuholela ekwehleni kwamandla endawo emikhiqizo ecindezelwe, okuholela ekuxebukeni.

2. Izimbotshana

Ama-pores abhekisela kuma-microns angaphezu kuka-40. Isizathu esiyinhloko sokukhiqizwa kwama-pores ukuthi kukhona ukungcola emzimbeni we-sintered ongamanziswa yinsimbi yesisombululo, noma kukhona ukuhlukaniswa okunzima kwesigaba esiqinile kanye nesigaba se-liquid, esingase sakhe izimbotshana.

3. Amabhamuza

Ibhamuza lizodala indawo eyi-convex ku-carbide enosimende, ngaleyo ndlela yehlise ukusebenza komkhiqizo we-tungsten carbide. Izizathu eziyinhloko zokwakheka kwamabhamuza a-sintered yilezi:

I-1) Umoya uqoqana emzimbeni we-sintered. Ngesikhathi senqubo yokuncipha kwe-sintering, umzimba owenziwe nge-sintered ubonakala uyisigaba se-liquid futhi uminyene, okuzovimbela umoya ukuthi ungaphumi, bese wenza ama-bubbles adilikile ebusweni bomzimba osikiwe ngokumelana okuncane;

I-2) Kukhona ukusabela kwamakhemikhali okukhiqiza inani elikhulu legesi emzimbeni we-sintered, futhi igesi igxiliwe emzimbeni we-sintered, futhi i-blister ikhiqizwa ngokwemvelo.

4. Ukuguquguquka

Izimo ezivamile zokuguquguquka kwe-carbide enosimende ziyi-blister ne-concave. Izizathu eziyinhloko ze-deformation wukusabalalisa kokuminyana okungalingani kwe-compact ecindezelwe. Ukushoda okukhulu kwekhabhoni emzimbeni we-sintered, ukulayishwa kwesikebhe okungenangqondo, nepuleti lokusekela elingalingani.

5. Isikhungo esimnyama

Isikhungo esimnyama sibhekisela engxenyeni enenhlangano evulekile ekuqhekekeni kwe-alloy. Isizathu esikhulu sezinhliziyo ezimnyama yi-carburizing noma i-decarburization.

6. Ukuqhekeka

I-Crack yinto evamile uma kuqhathaniswa nenqubo ye-sintering ye-carbide enosimende. Izizathu eziyinhloko zokuqhekeka yilezi:

I-1) Ukuphumula kwengcindezi akubonisi ngokushesha lapho i-billet isomile, futhi ukubuyiswa kwe-elastic kuyashesha ngesikhathi sokugcoba;

I-2) I-billet ifakwe i-oxidized ingxenye lapho isomile, futhi ukunwetshwa okushisayo kwengxenye ye-oxidized kuhluke kulokho kwengxenye engenalutho.

Uma unentshisekelo emikhiqizweni ye-tungsten carbide futhi ufuna ulwazi olwengeziwe nemininingwane, UNGATHI XHUMANA NATHI ngocingo noma ngemeyili kwesokunxele, noma SITHUMELE IMEYILI ezansi nekhasi.