Ngwakọta kemịkalụ

Gr.3: Carbon ọdịnaya ≤0.19%, silicon ọdịnaya 0.18%-0.37%, manganese ọdịnaya 0.31%-0.64%, phosphorus na sọlfọ ọdịnaya ≤0.025%, na nwekwara 3.18%-3.82% nickel.

Gr.6: Carbon ọdịnaya ≤0.30%, silicon ọdịnaya ≥0.10%, manganese ọdịnaya 0.29%-1.06%, phosphorus na sọlfọ ọdịnaya All ≤0.025%.

Ngwa igwe

Gr.3: ike tensile ≥450MPa, ike ike ≥240MPa, elongation ≥30% longitudinally, ≥20% transversely, ala mmetụta ule okpomọkụ bụ -150 ° F (-100 ° C).

Gr.6: ike ike ≥415MPa, ike ≥240MPa, elongation ≥30% longitudinally, ≥16.5% transversely, obere mmetụta ule okpomọkụ bụ -50 ° F (-45 ° C).

Usoro mmepụta

Agbaze: Jiri ọkụ eletrik ma ọ bụ ihe ntụgharị na akụrụngwa ndị ọzọ deoxidize, wepụ slag na alloy nchara a wụrụ awụ iji nweta nchara dị ọcha.

Ntugharị: Tinye nchara a wụrụ awụ n'ime igwe igwe na-agbagharị tube maka ịtụgharị, jiri nwayọọ nwayọọ belata dayameta tube wee nweta ọkpụrụkpụ mgbidi achọrọ, ma n'otu oge ahụ, mee ka elu nke tube ígwè dị nro.

Nhazi oyi: Site na nhazi oyi dị ka eserese oyi ma ọ bụ ntụgharị oyi, enwere ike imeziwanye nkenke na ọdịdị elu nke ígwè tube.

Okpomọkụ ọgwụgwọ: N'ozuzu, ọ na-anapụta na normalizing ma ọ bụ normalizing na tempering ala ikpochapụ ihe fọdụrụ nchegbu n'ime ígwè tube na melite ya keukwu arụmọrụ.

Mpaghara ngwa

Petrochemical: A na-eji ya na-emepụta pipeline ụgbọ mmiri na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ na mmanụ ọkụ, ụlọ ọrụ kemịkalụ, wdg, nke nwere ike imezu ihe a chọrọ na gburugburu ebe okpomọkụ dị ala, dị ka gas na-ekpo ọkụ na-ekpo ọkụ, tankị nchekwa ọkụ ọkụ, obere ọkụ ọkụ na-ebufe pipeline, wdg.

Gas eke: Kwesịrị ekwesị maka pipeline na-ebufe gas na tankị nchekwa gas na akụrụngwa ndị ọzọ iji hụ na arụ ọrụ nchekwa na gburugburu ebe okpomọkụ dị ala.

Ugbo ndị ọzọ: A na-ejikwa ya na ike, ikuku ikuku, na ụgbọ mmiri, dị ka isi ihe nhazi maka condensers, boilers na ngwá ọrụ ndị ọzọ na ngwá ọrụ ike, na isi ihe nhazi maka usoro hydraulic, mmanụ ọkụ na ngwá ọrụ ndị ọzọ na mbara igwe.

Nkọwa na akụkụ

Common nkọwa na akụkụ nwere a dịgasị iche iche, dị ka elu dayameta 21.3-711mm, mgbidi ọkpụrụkpụ 2-120mm, wdg.
Gr.6 enweghị nkebi ígwè ọkpọkọ, karịsịa ASTM A333/A333M GR.6 ma ọ bụ SA-333/SA333M GR.6obere okpomọkụ enweghị nkebi ígwè ọkpọkọ, bụ ihe dị mkpa ulo oru ihe, ọtụtụ ebe a na-eji n'oge dị iche iche na-achọ ala-okpomọkụ siri ike na elu ike. Ndị na-esonụ bụ nkọwa zuru ezu iwebata Gr.6 enweghị nkebi ígwè anwụrụ:

1. Ụkpụrụ na ihe eji eme ihe

Ụkpụrụ mmejuputa iwu: Gr.6 enweghị nkebi ígwè ọkpọkọ emejuputa ASTM A333/A333M ma ọ bụ ASME SA-333/SA333M ụkpụrụ, nke na-nyere site American Society for Testing and Materials (ASTM) na American Society of Mechanical Engineers (ASME) na na-kpọmkwem na-eji ezipụta teknụzụ chọrọ maka enweghị nkebi ígwè ọkpọkọ.

Ihe onwunwe: Gr.6 enweghị nkebi nchara ọkpọkọ bụ nickel-free obere okpomọkụ ígwè ọkpọkọ, nke na-eji aluminum-deoxidized ezi-grained ala okpomọkụ siri ike ígwè, makwaara dị ka aluminum-gburu ígwè. Ọdịdị metallographic ya bụ cubic ferrite nke gbadoro ụkwụ na ya.

2. Ngwakọta kemịkalụ

Ngwakọta kemịkalụ nke Gr.6 enweghị nkebi nchara anwụrụ tumadi gụnyere:

Carbon (C): Ọdịnaya dị ala, n'ozuzu anaghị agafe 0.30%, nke na-enyere aka belata nhịkọ nke ígwè.

Manganese (Mn): Ọdịnaya dị n'etiti 0.29% na 1.06%, nke nwere ike melite ike na ike nke ígwè.

Silicon (Si): Ọdịnaya dị n'etiti 0.10% na 0.37%, nke na-enyere usoro deoxidation nke ígwè aka ma nwee ike ịkwalite ike ígwè ruo n'ókè ụfọdụ.

Phosphorus (P) na sọlfọ (S): Dị ka ihe na-adịghị ọcha, ọdịnaya ha na-ejedebe nke ọma, n'ozuzu ọ bụghị karịa 0.025%, n'ihi na ọdịnaya dị elu nke phosphorus na sọlfọ ga-ebelata ike na weldability nke ígwè.

Ihe ndị ọzọ na-emepụta ihe: dị ka chromium (Cr), nickel (Ni), molybdenum (Mo), wdg, a na-achịkwa ọdịnaya ha na ọkwa dị ala iji hụ na arụ ọrụ okpomọkụ dị ala na ịrụ ọrụ zuru oke nke ígwè.

3. Mechanical Njirimara

Gr.6 enweghị nkebi ígwè ọkpọkọ nwere magburu onwe n'ibu Njirimara, tumadi gụnyere:

Ike ike: N'ozuzu n'etiti 415 na 655 MPa, nke na-eme ka ọ bụrụ na ọkpọkọ ígwè nwere ike ịnọgide na-eguzosi ike n'ezi ihe ma gbochie nkwụsịtụ mgbe nrụgide.

Ike mpụta: Uru kacha nta bụ ihe dịka 240 MPa (ọ nwekwara ike iru karịa 200 MPa), ka ọ ghara imepụta nrụrụ oke n'okpuru ụfọdụ ike mpụga.

Elongation: ọ bụghị ihe na-erughị 30%, nke pụtara na ọkpọkọ ígwè nwere ezigbo ike nrụrụ plastik ma nwee ike ịmepụta ụfọdụ nrụrụ na-enweghị imebi mgbe agbatị site na mpụga ike. Nke a dị mkpa karịsịa maka iji ya na gburugburu ebe okpomọkụ dị ala, n'ihi na okpomọkụ dị ala nwere ike ime ka ihe ahụ na-akụda, na ezigbo plasticity nwere ike ibelata ihe ize ndụ nke mgbagwoju anya dị otú ahụ.

Mmetụta mmetụta: N'oge a kapịrị ọnụ ala okpomọkụ (dị ka -45 Celsius C), mmetụta ike ga-emezu ụfọdụ ọnụọgụ chọrọ site Charpy mmetụta nnwale nkwenye iji hụ na ígwè anwụrụ agaghị agbajikwa mgbajikwa n'okpuru obere okpomọkụ mmetụta.