Matsalolin gama gari da Dalilan Tungsten Carbide Sintering

Sintering yana nufin tsarin jujjuya kayan foda zuwa gauraya mai yawa kuma mataki ne mai mahimmanci a cikin samar da simintin carbide. Tungsten carbide sintering tsari za a iya raba hudu asali matakai: kau da kafa wakili da pre-sintering mataki, m-lokaci sintering mataki (800 ℃ - eutectic zazzabi), ruwa lokaci sintering mataki (eutectic zazzabi - sintering zazzabi), da kuma sanyaya. mataki (sintering zazzabi - dakin zafin jiki). Duk da haka, saboda tsarin sintiri yana da rikitarwa sosai kuma yanayin yana da wuyar gaske, yana da sauƙi don samar da lahani da rage ingancin samfurori. Matsalolin da ke tattare da juna da kuma dalilansu sune kamar haka:

1. Barewa

Carbide da aka yi da siminti tare da lahani na peeling yana yiwuwa ya fashe don tsattsage da alli. Babban dalilin kwasfa shi ne gas ɗin da ke ɗauke da carbon yana lalata carbon ɗin kyauta, wanda ke haifar da raguwar ƙarfin gida na samfuran da aka matse, yana haifar da kwasfa.

2. Pores

Pores suna nufin sama da microns 40. Babban dalilin da ke haifar da haɓakar pores shine cewa akwai ƙazantattun abubuwa a cikin jiki wanda ba a jika ba ta hanyar karfen bayani, ko kuma akwai mummunar rabuwa na lokaci mai ƙarfi da lokacin ruwa, wanda zai iya haifar da pores.

3. Kumburi

Kumburi zai haifar da dunƙule saman saman simintin carbide, ta haka zai rage aikin samfurin carbide tungsten. Babban dalilai na samuwar kumfa mai tsauri sune:

1) Iska yana taruwa a cikin jikin da aka dade. A yayin aiwatar da raguwar raguwa, jikin da aka yi shi da shi yana bayyana yanayin ruwa kuma yana raguwa, wanda zai hana iskar fitar da shi, sannan kuma ya samar da kumfa masu ruguzawa a saman jikin da ba a taba yin juriya ba;

2) Akwai wani sinadarin da ke haifar da iskar gas mai yawa a cikin jikin da aka yi, kuma iskar ta ta'allaka ne a cikin jikin da ba a taba ba, kuma blister yana fitowa ne ta dabi'a.

4. Nakasa

Abubuwan nakasar gama gari na ciminti carbide sune blister da concave. Babban dalilai na nakasawa shine rarraba rashin daidaituwa na matsi na manne. Matsananciyar ƙarancin iskar carbon a cikin jikin da ba shi da tushe, lodin jirgin ruwa mara ma'ana, da faranti mara daidaituwa.

5. Baki cibiyar

Cibiyar baƙar fata tana nufin ɓangaren tare da ƙungiyar maras kyau akan karaya. Babban dalilin baƙar fata zukata shine carburizing ko decarburization.

6. Tsatsa

Crack wani lamari ne da ya zama ruwan dare gama gari a cikin tsarin siminti na siminti. Babban dalilan tsagewar sune:

1) Kwanciyar damuwa ba ta nuna nan da nan lokacin da aka bushe billet ba, kuma farfadowa na roba yana da sauri a lokacin sintering;

2) Billet ɗin yana ɗan ɗanɗano oxidized lokacin da aka bushe shi, kuma haɓakar thermal na ɓangaren oxidized ya bambanta da na ɓangaren da ba a sanya shi ba.

Idan kuna sha'awar samfuran carbide tungsten kuma kuna son ƙarin bayani da cikakkun bayanai, zaku iya tuntuɓar mu ta waya ko wasiƙa a hagu, ko Aika wasiƙun Amurka a kasan shafin.