Sabuwar fasahar ƙarfe

Gurbataccen ƙarfe gami simintin gyare -gyare babban zafi yana hana:

• 1) Quenching da tempering magani. Galibi don samun martensite da hana hazo na carbide; kashewa da zafin jiki shine kawar da damuwar damuwa da inganta tauri.
• 2) Daidaita + zafin jiki. Low-carbon martensitic corrosion-resistant steel wanda ke ɗauke da ƙaramin nickel, molybdenum, silicon da sauran abubuwa, bayan daidaita + magani mai zafi, an inganta kayan aikin injin.

Ferritic lalata resistant karfe, wannan nau'in ƙarfe yana da w (C) ≤ 0.12% da w (Cr) tsakanin 15-20%. Main hanyoyin magani zafi:

• 1) kamar yadda aka jefa;
• 2) Ƙuntatawa. Yawan zafin jiki na ƙonawa bai kamata ya kasance ƙasa da 540 ° C ba, ko sama da 850 ° C.

A lokacin aikin dumama, lokacin da zazzabi ya kai 350 ° C, ana amfani da zafin ƙarshe na ɗan lokaci don guje wa babban damuwa a kan simintin.

Austenitic corrosion resistant karfe, Matsayin ƙarfe na al'ada shine 1Cr18Ni9Ti. Main hanyoyin magani zafi:

• 1) M bayani. Ana yin simintin gyare-gyaren zuwa 950-1175 ° C, kuma yana da kyau a ɗauki tsarin zafin zafi a ƙaramin zafin jiki sannan a hanzarta dumama zuwa zafin zafin maganin.
• 2) Magani mai ƙarfi + maganin karfafawa. Bayan ingantaccen maganin maganin wani abu na ƙarfe kamar titanium bismuth, yakamata a ƙara ƙarfafawa. Wato, simintin gyare-gyaren yana sake yin zafi zuwa 850-930 ° C sannan a sanyaya da sauri. Don hana hazo na chromium carbide, haɓaka juriya ga lalatawar juna.

Hazo hardening lalata resistant karfe, Matsayin ƙarfe na al'ada shine ZGCr17Ni4Cu2. Hanyar maganin zafi shine ingantaccen bayani + ƙarfafa tsufa, zafin zafin shine 1020-1060 ° C, kuma zafin zafin shekaru shine 560-650 ° C.

Ƙarfe-ƙarfe mai juriya, baƙin ƙarfe mai jurewa yana ɗauke da abubuwa guda ɗaya kamar silicon, aluminum, chromium, nickel ko wani abun da aka haɗa da su. Don haɓaka kaddarorin injiniya na yau da kullun, ana ƙara abubuwan haɗawa kamar jan ƙarfe da ƙasa mai ƙarancin ƙarfi, kuma irin waɗannan kayan suna da ɗan wahala da kayan juriya. Hanyar jiyya mai zafi shine kawar da damuwa na ciki da ƙarancin zazzabi.

Shiga wannan labarin ： Metallurgical fasaha na lalata resistant karfe gami simintin

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