Menene manyan dalilan da suka shafi nakasar high mita quenching?

Abubuwan da ke shafar nakasar jiyya mai zafi mai saurin kashewa sun haɗa da ainihin tsarin ƙarfe, abun cikin carbon, girman da siffar sassan, zaɓin matsakaicin kashewa, tsarin kashewa, da taurin ƙarfe.

1. Tasirin abun ciki na carbon a cikin ƙarfe akan nakasar sassa a lokacin quenching zafi magani. Matsakaici da manyan karafan carbon suna da saurin fashewa yayin kashe zafi da yawa. Domin sanya nakasawa da fashewa, ƙananan ƙarfe na hypereutectoid yawanci suna amfani da quenching da bai cika ba don samun cryptocrystalline martensite, wanda ba shi da sauƙi don samar da microcracks. .

2. Hardenability na karfe kuma yana da wani tasiri a kan nakasar sassa a lokacin quenching zafi magani. Ƙarfafa ƙarfin ƙarfe yana da alaƙa da alaƙa da mahimmancin sanyaya adadin ƙarfe. Ƙananan ƙimar sanyi mai mahimmanci, mafi kyawun ƙarfin ƙarfe. Babban abin da zai rage mahimmancin kwantar da hankali shine tsarin sinadaran karfe. Karfe tare da mai kyau hardenability iya amfani da matsakaici quenching matsakaici a lokacin quenching da sanyaya don rage nakasawa da fatattaka hali na workpiece a lokacin quenching. Sabili da haka, don sassa masu mahimmanci tare da siffofi masu mahimmanci da manyan sassan, ya kamata a zaɓi mai kyau hardening. gami karfe. Bayan bautawa da zafin jiki, ana iya samun kayan aikin injiniya da ake buƙata kuma ana iya rage nakasawa da fatattaka.

3. Tasirin tsarin asali na karfe a kan quenching nakasawa na sassa. Ƙirƙirar ƙananan sassa na sassan da aka kashe yana da tasiri mai girma a kan quenching ingancin sassan. Misali, karfen gami, karfe mai dauke da karfe, da dai sauransu dole ne a shafe su bayan an yi. A lokacin quenching da dumama, da austenite hatsi ba su da sauki girma. Nakasar da fashewar kayan aikin ƙanƙanta ne, mafi ƙarancin girman ƙwayar kayan abu, mafi girman ƙarfin yawan amfanin ƙasa, kuma mafi girman juriya ga naƙasa, kuma nakasar aikin bayan an rage daidai.

1. Sakamakon quenching matsakaici akan nakasar sassa a lokacin quenching zafi magani. An yi imani da cewa tasirin yanayin sanyi na matsakaicin matsakaici a 300 ° C akan nakasawa shine mabuɗin, kuma matsakaicin quenching ya kamata a zaɓi shi da kyau gwargwadon ƙarfin ƙarfe, girman giciye na sashin. da rashin ƙarfi na ƙasa, da siffar geometric na ɓangaren yana rinjayar quenching nakasawa na ɓangaren. , Daga ra’ayi na tsarin kula da zafi, ƙirar ɓangaren ya fi dacewa don amfani da tsarin ma’auni, mai sarrafa yana guje wa sasanninta masu kaifi, kuma yana buƙatar sashe mai mahimmanci. Lokacin da ya cancanta, ana iya buɗe tsagi don aiwatarwa. Don haka, dole ne a zaɓi kayan da kyau don guje wa ɓarna.