Rarraba tsarin sintering na injin sintering makera

1. Kona-in mataki

Na farko shi ne delubrication ko kafa wakili mataki, wanda kuma za a iya kira pre-sintering mataki. A wannan mataki, ya kamata a tada zafin jiki a hankali. Yanayin bazuwar duka mai mai da mai samar da shi yana kusan 300 ° C. Sabili da haka, zafin jiki ya kamata ya kasance a hankali kamar yadda zai yiwu a kusan 300 ° C kuma yana da isasshen lokaci don cire mai mai. Matakin da aka rigaya ya ƙone yana buƙatar a ajiye shi a wani yanayin zafi na wani ɗan lokaci, wanda manufarsa ita ce ta cire mai mai sosai, da aiwatar da nata yanayin rage oxidation. Idan carbon yana ƙunshe a cikin ɓangaren sintered, yanayin carbon-oxygen zai faru sama da 700 ° C. Lokacin da ake buƙata don lokacin ƙonawa ya dogara da adadin man shafawa da aka saka a ɓangaren da girman ɓangaren. Ƙaddamar da ƙaddamarwa ta hanyar matakin farko ya kamata ya ba da damar mai mai ko mai samar da kayan aiki don lalata iskar gas da oxygen da za a kawar da su gaba daya. Ana iya ganin ko an kawar da waɗannan iskar gas gabaɗaya ta matakin vacuum. Idan matakin injin ya tsaya tsayin daka a wata ƙima, yana nufin an kawar da shi.

2. Matakin karkata

Matsakaicin zafin jiki da aka saita a mataki na sintering shine yawan zafin jiki da ake buƙata don sintiri. Saboda vacuum sintering yana da tasirin kunna kunnawa, zafin zafinsa ya kai 50 zuwa 100 ° C ƙasa da na iska. Idan ruwa lokaci sintering da aka yi, da sintering zafin jiki ya kamata a kayyade a wani zazzabi dan kadan sama da narkawar na ruwa lokaci karfe. Sintering tsakanin foda barbashi da alloying tsakanin alloying abubuwa zai faru a wannan mataki. A lokaci guda, bai kamata a yi amfani da digiri mai girma da yawa a wannan matakin ba, saboda girman matakin injin, mafi girman asarar ƙarfe na ruwa. Domin a rage yawan asarar karafa, wasu iskar gas irin su nitrogen, argon da hydrogen ana cika su da yawa.

3. Matakin sanyaya

Sanyaya injin sintering ya haɗa da sanyaya kashe wutar lantarki kai tsaye ko rage sanyaya ta mataki na gaba, wanda ya dogara da buƙatun sanyaya. Tun lokacin da aka sanyaya shi tare da tanderun, yawan sanyaya yana da hankali fiye da na yanayin ɓacin rai. Cike da iskar gas mai karewa na iya ƙara yawan sanyaya.

1. Kona-in mataki

Na farko shi ne delubrication ko kafa wakili mataki, wanda kuma za a iya kira pre-sintering mataki. A wannan mataki, ya kamata a tada zafin jiki a hankali. Yanayin bazuwar duka mai mai da mai samar da shi yana kusan 300 ° C. Sabili da haka, zafin jiki ya kamata ya kasance a hankali kamar yadda zai yiwu a kusan 300 ° C kuma yana da isasshen lokaci don cire mai mai. Matakin da aka rigaya ya ƙone yana buƙatar a ajiye shi a wani yanayin zafi na wani ɗan lokaci, wanda manufarsa ita ce ta cire mai mai sosai, da aiwatar da nata yanayin rage oxidation. Idan carbon yana ƙunshe a cikin ɓangaren sintered, yanayin carbon-oxygen zai faru sama da 700 ° C. Lokacin da ake buƙata don lokacin ƙonawa ya dogara da adadin man shafawa da aka saka a ɓangaren da girman ɓangaren. Ƙaddamar da ƙaddamarwa ta hanyar matakin farko ya kamata ya ba da damar mai mai ko mai samar da kayan aiki don lalata iskar gas da oxygen da za a kawar da su gaba daya. Ana iya ganin ko an kawar da waɗannan iskar gas gabaɗaya ta matakin vacuum. Idan matakin injin ya tsaya tsayin daka a wata ƙima, yana nufin an kawar da shi.

2. Matakin karkata

Matsakaicin zafin jiki da aka saita a mataki na sintering shine yawan zafin jiki da ake buƙata don sintiri. Saboda vacuum sintering yana da tasirin kunna kunnawa, zafin zafinsa ya kai 50 zuwa 100 ° C ƙasa da na iska. Idan ruwa lokaci sintering da aka yi, da sintering zafin jiki ya kamata a kayyade a wani zazzabi dan kadan sama da narkawar na ruwa lokaci karfe. Sintering tsakanin foda barbashi da alloying tsakanin alloying abubuwa zai faru a wannan mataki. A lokaci guda, bai kamata a yi amfani da digiri mai girma da yawa a wannan matakin ba, saboda girman matakin injin, mafi girman asarar ƙarfe na ruwa. Domin a rage yawan asarar karafa, wasu iskar gas irin su nitrogen, argon da hydrogen ana cika su da yawa.

3. Matakin sanyaya

Sanyaya injin sintering ya haɗa da sanyaya kashe wutar lantarki kai tsaye ko rage sanyaya ta mataki na gaba, wanda ya dogara da buƙatun sanyaya. Tun lokacin da aka sanyaya shi tare da tanderun, yawan sanyaya yana da hankali fiye da na yanayin ɓacin rai. Cike da iskar gas mai karewa na iya ƙara yawan sanyaya.