A cikin ƙirar ƙarfe na tsari, ingancin walda kai tsaye yana rinjayar ƙarfi, karrewa, da amincin tsarin ƙarshe. Don mahimman sassa na tsarin, gami da faranti mai kauri, faranti mai kauri, da ƙaƙƙarfan ƙayyadaddun welded gidajen abinci, ingantaccen preheating kafin waldawa da jiyya na zafi bayan walda (PWHT) na iya taka muhimmiyar rawa wajen sarrafa fatattaka, rage damuwa na saura, da haɓaka aikin gabaɗaya na welded gidajen abinci.

1. Me yasa preheating yake da mahimmanci kafin walda?

Preheating yana nufin dumama karfen tushe a kusa da yankin walda zuwa takamaiman zafin jiki kafin a fara walda. Matsakaicin zafin jiki da ake buƙata ya dogara da abubuwa kamar ƙimar ƙarfe, daidai da carbon, kauri na kayan, abubuwan walda, kamun haɗin gwiwa, tsarin walda, da zafin yanayi.

Babban amfanin preheating sun haɗa da:

Rage Haɗarin Haɗawar Hydrogen

Preheating yana rage yawan sanyaya na weld da yankin da zafi ya shafa (HAZ). Wannan yana ba da hydrogen mai yayyafa lokaci don kuɓuta daga haɗin haɗin welded kuma yana rage samuwar ƙaƙƙarfan ƙaƙƙarfan microstructures.

A sakamakon haka, ana iya rage haɗarin fashewar hydrogen da fashewar sanyi sosai.

Rage Matsalolin Walƙiya

Lokacin waldawa, ƙarfen kusa da walda yana yin zafi da sauri yayin da abin da ke kewaye ya kasance mai sanyi. Wannan bambance-bambancen zafin jiki yana haifar da gradients thermal, nakasawa, da saura damuwa.

Preheating mai kyau yana rage bambance-bambancen zafin jiki tsakanin yankin walda da karfen da ke kewaye da shi, yana barin haɗin gwiwar welded don yin sanyi a hankali da kuma iri ɗaya.

Wannan yana taimakawa rage damuwa na walda kuma yana rage yiwuwar fashewa da murdiya.

Rage Tasirin Haɗin gwiwa

Wuraren da aka katange welded sun fi saurin fashewa saboda raguwa a lokacin sanyaya ba zai iya faruwa cikin yardar kaina ba.

Preheating na iya rage tsananin ƙanƙanwar zafi kuma yana da amfani musamman ga faranti mai kauri, hadaddun haɗin gwiwa, da haɗin kai sosai.

A yawancin lokuta, haɓaka yanayin zafin zafin da ya dace zai iya taimakawa rage yuwuwar fashewar walda.

2. Ta yaya yakamata a ƙayyade zafin zafin jiki na zafin jiki?

Zaɓin zafin zafin jiki da zafin jiki bai kamata ya dogara da kaurin abu kaɗai ba.

Ya kamata a yi la'akari da abubuwa da yawa, ciki har da:

• Karfe sa da sinadaran abun da ke ciki

• Carbon daidai

• Kaurin faranti

• Abubuwan amfani da walda

• Tsarin walda

• Tsarin haɗin gwiwa

• Ƙuntataccen tsari

• Yanayin yanayi

• Shigar da zafi

• Lambobin walda masu aiki da ƙayyadaddun aikin

dumama Uniform yana da mahimmanci daidai.

Ya kamata zafin zafin zafin ya zama daidai daidai ta hanyar kauri daga cikin karfe da kuma tare da yankin walda. Duma mara daidaituwa na iya haifar da ƙarin damuwa mai zafi maimakon rage shi.

Don preheating na gida, yankin mai zafi ya kamata ya shimfida isasshe fiye da ɓangarorin biyu na walda don tabbatar da daidaituwar yanayin zafi iri ɗaya.

Madaidaicin faɗin dumama da zafin jiki yakamata koyaushe bi ƙayyadaddun ƙayyadaddun tsarin walda ( WPS ), buƙatun injiniya, da matakan walda masu dacewa.

3. Me yasa Maganin Zafin Bayan Weld Ke da Muhimmanci?

Ana yin maganin zafi bayan walda bayan walda don sarrafa saura damuwa, rage abun ciki na hydrogen, da haɓaka microstructure da kaddarorin inji na haɗin gwiwar welded.

Dangane da ƙimar ƙarfe, kauri, yanayin sabis, da ƙayyadaddun walda, maganin zafi bayan walda na iya ba da fa'idodi da yawa.

Cire Hydrogen

Bayan waldawa, hydrogen mai yayyafawa na iya kasancewa a cikin ƙarfen walda da yankin da zafi ya shafa.

Don wasu karafa da mahaɗaɗɗen haɗin gwiwa, ana iya amfani da maganin cirewar hydrogen mai ƙarancin zafin jiki jim kaɗan bayan walda.

Dumama haɗin gwiwa na welded na wani ƙayyadadden lokaci na iya haɓaka yaduwa da sakin hydrogen, don haka rage haɗarin jinkirta fashewar hydrogen.

Ya kamata a ƙayyade ainihin zafin jiki da lokacin riƙewa bisa ga ƙimar ƙarfe, tsarin walda, kauri na haɗin gwiwa, da ƙa'idodi masu dacewa.

Rage Ragowar Damuwar walda

Welding yana haifar da dumama da sanyaya a cikin gida sosai. Saboda abin da ke kewaye da abin da ke kewaye yana da alaƙa da abin da aka yi masa walda, abubuwan da suka rage sun kasance a cikin tsarin bayan walda.

Matsananciyar damuwa na iya taimakawa ga:

• Welding nakasawa

• Damuwa maida hankali

• Rage aikin gajiya

• Ƙara haɗarin fashewa

• Rashin kwanciyar hankali

Maganin zafi mai saurin damuwa yana dumama ɓangaren walda zuwa yanayin zafi mai sarrafawa kuma yana riƙe shi na ƙayyadadden lokaci, yana barin damuwa na ciki don sake rarrabawa da shakatawa.

Dangane da girman ɓangaren da buƙatun aikin, ana iya aiwatar da maganin zafi a kan gabaɗayan ɓangaren ko a cikin gida a kusa da haɗin gwiwar da aka haɗa.

Inganta Weld Microstructure

Wasu karafa masu ƙarfi da ƙarfe masu ƙarfi na iya haɓaka ƙaƙƙarfan ƙaƙƙarfan ƙaƙƙarfan ƙayyadaddun ƙayyadaddun abubuwa a cikin yankin da zafi ya shafa bayan walda.

Idan waɗannan microstructures sun kasance tare da babban damuwa na saura da hydrogen, haɗin gwiwa na welded zai iya zama mafi sauƙi ga fashewa ko gazawa.

Maganin zafi da ya dace zai iya taimakawa inganta tsarin ƙarfe na haɗin gwiwa da aka yi masa walda kuma yana iya haɓaka:

• Tauri

• Halittu

• Kwanciyar kwanciyar hankali

• Tsage juriya

• Gabaɗaya aikin injiniya

4. Gabaɗaya Tsarin Maganin Zafin Gabaɗaya da Bayan Weld

Tsarin sarrafa ingancin walda na yau da kullun na iya haɗawa da:

Ƙirar Ƙirƙira → Bitar Tsarin Welding → Preheating → Duban Zazzabi → Welding → Interpass Temperature Control → Weld Inspection → Cire Hydrogen ko PWHT Lokacin da ake buƙata → Duban Ƙarshe

Ya kamata a kula da yanayin zafin jiki a duk lokacin aikin walda ta amfani da kayan auna daidai.

Don mahimman ayyukan tsarin ƙarfe, tsarin walda, zafin zafin jiki, zafin jiki na tsaka-tsaki, da buƙatun jiyya bayan walda yakamata a fayyace su a fili a cikin ingantaccen takaddun WPS da ingancin aikin.

5. Ana Bukatar Preheating da PWHT don Kowane Tsarin Karfe?

A'a.

Ba kowane tsarin welded karfe yana bukatar preheating ko bayan-weld magani zafi.

Ko waɗannan hanyoyin sun zama dole ya dogara da dalilai kamar:

• Karfe kayan daraja

• Carbon daidai

• Kaurin faranti

• Muhimmancin tsari

• Haɗin gwiwa

• Tsarin walda

• Yanayin sabis

• Ma'auni na duniya masu aiki

• Abubuwan buƙatun aikin injiniya na musamman

Don abubuwan haɗin ƙarfe na carbon na yau da kullun tare da ƙananan sassa na bakin ciki da ƙarancin haɗin haɗin gwiwa, ƙila ba za a buƙaci babban maganin zafi ba.

Koyaya, don faranti mai kauri, ƙarfe mai ƙarfi, ƙarfe mai ƙarfi, mambobi masu ɗaukar nauyi masu mahimmanci, ko ƙaƙƙarfan haɗe-haɗen walda, sarrafa zafin jiki ya zama mafi mahimmanci.

Kammalawa

Preheating da bayan walda magani ba kawai ƙarin hanyoyin walda ba ne. Lokacin da ake buƙata ta kayan, ƙirar haɗin gwiwa, hanyar walda, ko ƙayyadaddun aikin injiniya, suna da mahimmancin matakan kula da inganci don haɓaka amincin tsarin haɗin ginin ƙarfe na walda.

Kula da zafin jiki da ya dace zai iya taimakawa wajen rage fashewar hydrogen, sarrafa adadin sanyaya, rage yawan damuwa, rage murdiya, da haɓaka tauri da aikin haɗin gwiwa gabaɗaya.

A ZSJH STEEL , ana sarrafa sigogin walda bisa ga hanyoyin ƙirƙira da aka amince da su, ƙayyadaddun aikin, buƙatun kayan aiki, da ƙa'idodi masu dacewa. Daga shirye-shiryen kayan aiki da walƙiya don dubawa, jiyya na ƙasa, da bayarwa na ƙarshe, muna ba da sabis na ƙirƙira ƙirar ƙarfe mai haɗaka don ayyukan masana'antu da kasuwanci a duk duniya.

Ana neman amintaccen abokin ƙera kayan ƙarfe?

Aika mana zanenku, ƙayyadaddun fasaha, ko buƙatun aikin. Injiniyoyin mu da ƙungiyar samarwa na iya tallafawa ƙirar ƙirar ƙarfe na musamman, walda, dubawa mai inganci, marufi, isar da fitarwa, da jagorar shigarwa.