Abubuwan sinadaran

Gr.3: Carbon abun ciki ≤0.19%, silicon abun ciki 0.18% -0.37%, manganese abun ciki 0.31% -0.64%, phosphorus da sulfur abun ciki ≤0.025%, kuma ya ƙunshi 3.18% -3.82% nickel.

Gr.6: Carbon abun ciki ≤0.30%, silicon abun ciki ≥0.10%, manganese abun ciki 0.29% -1.06%, phosphorus da sulfur abun ciki Duk ≤0.025%.

Kayan aikin injiniya

Gr.3: ƙarfi mai ƙarfi ≥450MPa, yawan amfanin ƙasa ≥240MPa, elongation ≥30% longitudinally, ≥20% transversely, low tasiri gwajin zafin jiki ne -150 ° F (-100 ° C).

Gr.6: Ƙarfin ƙarfi ≥415MPa, ƙarfin yawan amfanin ƙasa ≥240MPa, elongation ≥30% tsayi, ≥16.5% transversely, ƙananan zafin gwajin tasiri shine -50 ° F (-45 ° C).

Tsarin samarwa

Warkarwa: Yi amfani da tanderun lantarki ko na'ura mai canzawa da sauran kayan aiki don deoxidize, cire slag da gami da narkakkar karfe don samun tsaftataccen zubin karfe.

Mirgina: Allurar narkakkar karfe a cikin bututun niƙa don yin birgima, sannu a hankali rage diamita bututu kuma samun kaurin bangon da ake buƙata, kuma a lokaci guda, santsi saman bututun ƙarfe.

Sarrafa sanyi: Ta hanyar sarrafa sanyi kamar zane mai sanyi ko mirgina sanyi, ana iya inganta daidaito da ingancin saman bututun ƙarfe.

Zafi magani: Gabaɗaya, an tsĩrar da a normalizing ko normalizing da tempering jihar don kawar da saura danniya a cikin karfe tube da kuma inganta ta m yi.

Filin aikace-aikace

Petrochemical: Ana amfani da shi don kera bututun jirgin ruwa mai ƙarancin zafin jiki da bututun musayar zafi mai ƙarancin zafi a cikin fa'idodin man fetur, masana'antar sinadarai, da dai sauransu, waɗanda za su iya biyan buƙatun amfani a cikin ƙananan yanayin zafi, kamar iskar gas mai ɗorewa, tankunan ajiya na iskar gas, ƙarancin zafi watsa bututun, da sauransu.

Iskar Gas: Ya dace da bututun watsa iskar gas da tankunan ajiyar iskar gas da sauran kayan aiki don tabbatar da amintaccen aiki a cikin ƙananan yanayin zafi.

Sauran filayen: Hakanan ana amfani da shi a cikin wutar lantarki, sararin samaniya, da ginin jirgin ruwa, kamar manyan kayan aikin injinan wutan lantarki, tukunyar jirgi da sauran kayan aiki a cikin kayan aikin wutar lantarki, da manyan kayan aikin na'urorin lantarki, tsarin mai da sauran kayan aiki a filin sararin samaniya.

Ƙayyadaddun bayanai da girma

Common bayani dalla-dalla da girma suna da fadi da kewayon, kamar m diamita 21.3-711mm, bango kauri 2-120mm, da dai sauransu
Gr.6 m karfe bututu, musamman ASTM A333/A333M GR.6 ko SA-333/SA333M GR.6ƙananan zafin jiki maras ƙarfi bututu, wani muhimmin kayan masana'antu ne, ana amfani da shi sosai a lokuta daban-daban waɗanda ke buƙatar ƙarancin zafin jiki da ƙarfi mai ƙarfi. Mai zuwa shine cikakken gabatarwa ga Gr.6 bututu maras nauyi:

1. Matsayin aiwatarwa da kayan aiki

Matsayin aiwatarwa: Gr.6 maras nauyi bututu yana aiwatar da ASTM A333/A333M ko ASME SA-333/SA333M ka'idojin, waɗanda aka bayar ta American Society for Testing and Materials (ASTM) da American Society of Mechanical Engineers (ASME) kuma ana amfani da su musamman don ƙayyade buƙatun fasaha don bututun ƙarfe mara nauyi.

Material: Gr.6 m karfe bututu ne nickel-free low-zazzabi karfe bututu, wanda yana amfani da aluminum-deoxidized lafiya-grained low-zazzabi tauri karfe, kuma aka sani da aluminum-kashe karfe. Tsarinsa na ƙarfe na ƙarfe ferrite mai siffar siffar jiki ne.

2. Abubuwan sinadaran

Abubuwan sinadaran Gr.6 bututun karfe maras sumul ya hada da:

Carbon (C): Abubuwan da ke ciki ba su da ƙarfi, gabaɗaya baya wuce 0.30%, wanda ke taimakawa rage ɓarnar ƙarfe.

Manganese (Mn): Abun ciki yana tsakanin 0.29% da 1.06%, wanda zai iya inganta ƙarfi da taurin ƙarfe.

Silicon (Si): Abin da ke ciki yana tsakanin 0.10% da 0.37%, wanda ke taimakawa tsarin deoxidation na karfe kuma zai iya inganta ƙarfin karfe zuwa wani matsayi.

Phosphorus (P) da sulfur (S): A matsayin abubuwa na ƙazanta, abubuwan da ke cikin su ba su da iyaka, gabaɗaya baya wuce 0.025%, saboda babban abun ciki na phosphorus da sulfur zai rage ƙarfi da walƙiya na ƙarfe.

Sauran abubuwa masu haɗawa: irin su chromium (Cr), nickel (Ni), molybdenum (Mo), da dai sauransu, ana sarrafa abubuwan da ke cikin su a ƙananan matakin don tabbatar da ƙarancin zafin jiki da kuma cikakken aikin karfe.

3. Mechanical Properties

Gr.6 maras sumul karfe bututu yana da kyau kwarai inji Properties, yafi ciki har da:

Ƙarfin ƙarfi: Gabaɗaya tsakanin 415 da 655 MPa, wanda ke tabbatar da cewa bututun ƙarfe na iya kiyaye daidaiton tsari kuma ya hana fashewa yayin matsin lamba.

Ƙarfin Haɓaka: Matsakaicin ƙimar kusan 240 MPa (zai iya kaiwa fiye da 200 MPa), ta yadda ba zai haifar da nakasar da ta wuce kima a ƙarƙashin wasu sojojin waje ba.

Tsawaitawa: ba kasa da 30% ba, wanda ke nufin cewa bututun ƙarfe yana da kyakkyawar nakasar filastik kuma yana iya haifar da wani nakasar ba tare da karyewa ba lokacin da ƙarfin waje ya miƙe. Wannan yana da mahimmanci musamman don amfani a cikin ƙananan yanayin zafi, saboda ƙananan zafin jiki na iya sa kayan ya lalace, kuma filastik mai kyau zai iya rage haɗarin irin wannan embrittlement.

Tauri Tasiri: A ƙayyadadden ƙananan zafin jiki (kamar -45°C), ƙarfin tasirin dole ne ya cika wasu buƙatun lambobi ta hanyar tabbatar da gwajin tasirin Charpy don tabbatar da cewa bututun ƙarfe ba zai karye ba a ƙarƙashin ƙarancin zafin jiki.