ʻAno kemika

Gr.3: ʻO ka nui o ke kalapona ≤0.19%, ka nui o ka silicon 0.18%-0.37%, ka nui o ka manganese 0.31%-0.64%, ka nui o ka phosphorus a me ka sulfur ≤0.025%, a loaʻa pū kekahi 3.18%-3.82% nickel.

Gr.6: ʻO ka nui o ke kalapona ≤0.30%, ka nui o ka silicon ≥0.10%, ka nui o ka manganese 0.29%-1.06%, ka nui o ka phosphorus a me ka sulfur. A pau ≤0.025%.

Nā waiwai mīkini

Gr.3: ikaika tensile ≥450MPa, ikaika hua ≥240MPa, elongation ≥30% longitudinally, ≥20% transversely, haʻahaʻa ka hopena hoʻāʻo mahana he -150°F (-100°C).

Gr.6: ikaika tensile ≥415MPa, ikaika hua ≥240MPa, elongation ≥30% longitudinally, ≥16.5% transversely, haʻahaʻa ka hopena hoʻāʻo mahana he -50°F (-45°C).

Kaʻina hana

Hoʻoheheʻe ʻana: E hoʻohana i ka umu uila a i ʻole ka mea hoʻololi a me nā lako ʻē aʻe e deoxidize, wehe i ka slag a hoʻohuihui i ke kila hoʻoheheʻe ʻia e loaʻa ai ke kila hoʻoheheʻe maʻemaʻe.

ʻŌwili: E hoʻokomo i ke kila hoʻoheheʻe ʻia i loko o ka wili ʻōwili paipu no ka ʻōwili ʻana, e hoʻemi mālie i ke anawaena o ka paipu a loaʻa ka mānoanoa o ka paia i koi ʻia, a i ka manawa like, e hoʻomālie i ka ʻili o ka paipu kila.

Ka hana anu: Ma o ka hana anu e like me ke kaha kiʻi anu a i ʻole ka ʻōwili anu, hiki ke hoʻomaikaʻi hou ʻia ka pololei a me ka maikaʻi o ka ʻili o ka paipu kila.

Ka mālama wela: Ma keʻano laulā, hāʻawi ʻia i ke kūlana normalizing a i ʻole normalizing a me ka tempering e hoʻopau i ke koena o ke kaumaha i loko o ka paipu kila a hoʻomaikaʻi i kāna hana piha.

Kahua noi

Petrochemical: Hoʻohana ʻia e hana i nā pipeline ipu hoʻohaʻahaʻa haʻahaʻa a me nā pipeline hoʻololi wela haʻahaʻa i nā kahua o ka petroleum, ʻoihana kemika, a me nā mea ʻē aʻe, hiki ke hoʻokō i nā koi hoʻohana i nā wahi haʻahaʻa haʻahaʻa, e like me nā pahu mālama kinoea kūlohelohe wai, nā pipeline hoʻoili haʻahaʻa haʻahaʻa, a me nā mea ʻē aʻe.

Kinoea kūlohelohe: Kūpono no nā paipu hoʻoili kinoea kūlohelohe a me nā pahu mālama kinoea a me nā lako ʻē aʻe e hōʻoia i ka hana palekana i nā wahi haʻahaʻa haʻahaʻa.

Nā kahua ʻē aʻe: Hoʻohana ʻia hoʻi ia i ka mana, aerospace, a me ke kūkulu moku, e like me nā mea hana nui no nā condensers, nā paila a me nā lako ʻē aʻe i nā lako mana, a me nā mea hana nui no nā ʻōnaehana hydraulic, nā ʻōnaehana wahie a me nā lako ʻē aʻe i ke kahua aerospace.

Nā kikoʻī a me nā ana

He ākea ka laulā o nā kikoʻī maʻamau a me nā ana, e like me ke anawaena o waho 21.3-711mm, ka mānoanoa o ka paia 2-120mm, a pēlā aku.
Paipu kila humuhumu Gr.6, ʻoi aku hoʻi ʻo ASTM A333/A333M GR.6 a i ʻole SA-333/SA333M GR.6ʻO ka paipu kila humuhumu haʻahaʻa haʻahaʻa, he mea ʻoihana koʻikoʻi ia, hoʻohana nui ʻia i nā manawa like ʻole e koi ana i ka paʻakikī haʻahaʻa a me ka ikaika kiʻekiʻe. Eia kahi hoʻolauna kikoʻī i ka paipu kila humuhumu Gr.6:

1. Nā kūlana hoʻokō a me nā mea hana

Nā kūlana hoʻokō: Hoʻokō nā paipu kila seamless Gr.6 i nā kūlana ASTM A333/A333M a i ʻole ASME SA-333/SA333M, i hoʻopuka ʻia e ka American Society for Testing and Materials (ASTM) a me ka American Society of Mechanical Engineers (ASME) a ​​hoʻohana kūikawā ʻia e kuhikuhi i nā koi loea no nā paipu kila seamless a me nā paipu kila i hoʻopaʻa ʻia no ka mahana haʻahaʻa.

Mea Hana: ʻO ka paipu kila seamless Gr.6 he paipu kila haʻahaʻa wela ʻole nickel, kahi e hoʻohana ana i ke kila paʻakikī wela haʻahaʻa i hoʻokaʻawale ʻia me ka alumini, i ʻike ʻia hoʻi he kila pepehi alumini. ʻO kona ʻano metallographic he ferrite cubic i waenakonu o ke kino.

2. Ka hoʻohuihui kemika

ʻO ka hoʻohuihui kemika o ka paipu kila seamless Gr.6 e komo pū ana me:

Kalapona (C): Haʻahaʻa ka ʻike, ʻaʻole ma mua o 0.30%, kahi e kōkua ai i ka hōʻemi ʻana i ka palupalu o ke kila.

Manganese (Mn): Aia ka ʻike ma waena o 0.29% a me 1.06%, hiki ke hoʻomaikaʻi i ka ikaika a me ke kūpaʻa o ke kila.

Silicon (Si): Aia ka ʻike ma waena o 0.10% a me 0.37%, e kōkua ana i ke kaʻina hana deoxidation o ke kila a hiki ke hoʻonui i ka ikaika o ke kila i kekahi ʻano.

ʻO ka Phosphorus (P) a me ka sulfur (S): Ma ke ʻano he mau mea haumia, ua kaupalena loa ʻia ko lākou ʻike, ʻaʻole ma mua o 0.025%, no ka mea, ʻo ka nui o ka phosphorus a me ka sulfur e hōʻemi i ka paʻakikī a me ka hiki ke hoʻopili ʻia o ke kila.

ʻO nā mea hoʻohuihui ʻē aʻe: e like me chromium (Cr), nickel (Ni), molybdenum (Mo), a pēlā aku, ua kāohi ʻia ko lākou ʻike ma kahi pae haʻahaʻa e hōʻoia i ka hana haʻahaʻa haʻahaʻa a me ka hana piha o ke kila.

3. Nā waiwai mīkini

He maikaʻi loa nā waiwai mechanical o ka paipu kila Gr.6 seamless, ʻo ia hoʻi:

Ikaika tensile: Ma waena o 415 a me 655 MPa, ka mea e hōʻoiaʻiʻo ai e hiki i ka paipu kila ke mālama i ka kūpaʻa o ke kūkulu ʻana a pale i ka haki ʻana i ka wā o ke kaomi.

Ikaika hua: ʻO ka waiwai haʻahaʻa loa ma kahi o 240 MPa (hiki iā ia ke piʻi aku ma mua o 200 MPa), i ʻole e hana i ka deformation nui ma lalo o kekahi mau mana o waho.

Elongation: ʻaʻole emi ma lalo o 30%, ʻo ia hoʻi he hiki ke hoʻololi plastik maikaʻi ka paipu kila a hiki ke hana i kahi deformation me ka ʻole o ka haki ʻana i ka wā e kīkoʻo ʻia e ka ikaika o waho. He mea nui loa kēia no ka hoʻohana ʻana i nā wahi mahana haʻahaʻa, no ka mea, hiki i ka mahana haʻahaʻa ke hoʻolilo i ka mea i palupalu, a hiki i ka plasticity maikaʻi ke hōʻemi i ka pilikia o ia ʻano embrittlement.

Paʻakikī o ka hopena: Ma kahi mahana haʻahaʻa i kuhikuhi ʻia (e like me -45°C), pono e hoʻokō ka ikehu hopena i kekahi mau koi helu ma o ka hōʻoia ʻana o ka hoʻāʻo hopena Charpy e hōʻoia i ka haki ʻole o ka paipu kila ma lalo o ka hopena haʻahaʻa.