Kumu kūʻai kūikawā no ka paipu kino kino kino ʻole ʻia - 904L paipu kila ʻole - Huaxin

1. wehewehe maʻalahi:

904L super austenitic kuhiliʻole kila he haʻahaʻa-carbon, kiʻekiʻe nickel, molybdenum austenitic kuhiliʻole ʻakika kila.

Papa helu GB: 00Cr20Ni25Mo4.5Cu

Papa honua: 904L

Papa maʻamau ʻAmelika: UNS:N08904

EN Papa: 1.4539

Nui ka nui: 10*2mm a 219*15mm a i ʻole e like me ka makemake o ka mea kūʻai aku

Ka lōʻihi: 300mm a 20000mm

2. Hoʻohui Kimia:

3. Pono Mechanical:

4.904L wehewehe:

1) Super austenitic stainless steel 904L (00Cr20Ni25Mo4.5Cu; UNS: N08904; EN: 1.4539)

he kuhili austenitic kiʻekiʻe kila me ke kalapona haʻahaʻa.

Loaʻa iā ia ka pale corrosion maikaʻi i ka dilute sulfuric acid a ua hoʻolālā kūikawā ʻia no nā kaiapuni

me nā kūlana corrosion koʻikoʻi. He kiʻekiʻe ka chromium maʻiʻo a lawa ka nickel maʻiʻo. ʻO ka hoʻohui o ke keleawe e loaʻa iā ia

ke kū'ē i ka waika ikaika, ʻoi aku ke kūpaʻa kiʻekiʻe i ka chloride interstitial corrosion a me ke koʻikoʻi corrosion māhā. ʻAʻole maʻalahi ke ʻike

nā wahi ʻino a me nā māwae. ʻOi aku ka maikaʻi o kona kūpaʻa ʻana i ka corrosion ma mua o nā kila ʻē aʻe. Loaʻa iā ia ka processability maikaʻi a

weldability, a hiki ke hoʻohana ʻia no nā moku kaomi.

2) ʻO ke kila kila kila 904L:

ʻO 904L kahi hale austenitic piha. Ke hoʻohālikelike ʻia me ke kila kila austenitic maʻamau me ka molybdenum kiʻekiʻe,

He hopena koʻikoʻi ka 904L ma ka ferrite a me ka α ʻAʻole paʻakikī ka ua o ka pae.

a. Nā waiwai kino a me ka mechanical:

Māmā: 8.0g/cm3. Ka ikaika uʻi: σ b≥520Mpa. Elongation: δ ≥35% 。 ʻO ke kūpaʻa ʻino o 904L kila kila:

No ka mea he haʻahaʻa loa ka maʻiʻo kalapona o 904L (ʻoi loa 0.020%), ʻaʻohe ua carbide ma lalo o ka laulā.

ka mālama wela a me nā kūlana wili. Hoʻopau kēia i ka pilikia o ka corrosion intergranular ma hope o ka mālama wela maʻamau a me ka wili.

Ma muli o ke kiʻekiʻe o ka chromium, nickel a me ka molybdenum a me ka hoʻohui o ke keleawe, hiki ke hoʻololi ʻia ka 904L a hiki i ka hoʻemi ʻana.

nā kaiapuni, e like me sulfuric acid a me formic acid.

ʻO ka maʻiʻo nickel kiʻekiʻe e loaʻa iā ia ka haʻahaʻa corrosion rate ma ke kūlana hana. I loko o ka hoʻopaʻa ʻana o ka 0 ~ 98% o ka sulfuric acid maʻemaʻe,

ʻO ka mahana hoʻohana o 904L hiki ke kiʻekiʻe e like me 40 ℃. ʻO ke kūpaʻa ʻino o ka waika phosphoric maʻemaʻe i ka pae hoʻopaʻa ʻana o 0 ~ 85% ʻo ia

maikaʻi loa.

I loko o ka ʻenehana phosphoric acid i hana ʻia e ka kaʻina wai, ʻoi aku ka ikaika o nā haumia i ke kūpaʻa corrosion. Mawaena o na ano a pau

ʻO ka waika phosphoric, 904L ʻoi aku ka maikaʻi o ka corrosion ma mua o ke kila kila maʻamau. I ka ikaika oxidizing nitric acid, ka corrosion kū'ē o 904L

ʻoi aku ka haʻahaʻa ma mua o ke kila kila kiʻekiʻe me ka molybdenum. I loko o ka waika hydrochloric, ua kaupalena ʻia ka hoʻohana ʻana o 904L i ka 1-2% o ka haʻahaʻa haʻahaʻa.

Ma keia pae noonoo. ʻOi aku ka maikaʻi o ka pale ʻana i ka corrosion o 904L ma mua o ke kila kila maʻamau. 904L kila i kiʻekiʻe kū'ē i

ʻinoʻino kiko.

I loko o ka hoʻonā chloride, ʻoi aku ka maikaʻi o kona pale ʻana i ka corrosion. ʻO ke kiʻekiʻe o ka nickel content o 904L e hōʻemi i ka nui o ka corrosion ma nā lua a me nā māwae.

Ke ʻoi aku ka kiʻekiʻe o ka mahana o ke kila kila austenitic maʻamau ma mua o 60 ℃, hiki ke maʻalahi i ka corrosion koʻikoʻi i loko o kahi waiwai chloride.

kaiapuni.

Hiki ke hoʻemi ʻia kēia naʻau ma ka hoʻonui ʻana i ka ʻike nickel o ke kila kila. Ma muli o ke kiʻekiʻe o ka nickel content, 904L ke kū'ē kiʻekiʻe

ka po'i po'i 'ana i loko o ka solution chloride, concentrated hydroxide solution a me ka hydrogen sulfide waiwai.

Ke kākoʻo nei i nā mea hoʻoheheʻe: ke koʻokoʻo kuʻi (E385-16/17), ke kaula wili (ER385).

b. ʻO nā ʻōkuhi no ka hoʻohana ʻana i ka 904L:

1. Ka hiki ke hana

1.1 Hana kuʻihao

E like me ke kila kila maʻamau, hiki ke hoʻopili ʻia ʻo 904L e nā ʻano hana kuʻi. ʻO ke ala hoʻoheheʻe maʻamau ʻo ka manual arc welding a i ʻole

wiliwili pale kinoea.

Hoʻokumu ʻia ka electrode a i ʻole uea metala ma luna o ke ʻano o ka metala kumu a ʻoi aku ka maʻemaʻe. Pono ka ʻike molybdenum

kiʻekiʻe ma mua o ka metala kumu.

ʻAʻole koi ʻia ka preheating ma mua o ke kuʻi ʻana, akā i ka hana ʻana i waho, e pale i ka condensation o ka mahu wai, nā hui a i ʻole nā ​​​​mea pili.

Hiki ke hoʻomāhana ʻia nā wahi.

ʻAʻole ʻoi aku ka mahana o ka ʻāina ma mua o 100 ℃ e pale i ka hōʻiliʻili kalapona a me ka corrosion intergranular. Ka ikehu laina liʻiliʻi, hoʻomau

a e hoʻopaʻa ʻia ka helu kuʻi wikiwiki i ka wā wili.

ʻO ka maʻamau, ʻaʻole koi ʻia ka mālama wela ma hope o ka wili. Inā makemake ʻia ka hoʻomaʻamaʻa wela, pono e hoʻomehana ʻia i 11000 ～ 1150 ℃ a laila maʻalili koke.

1.2 Hana mīkini

ʻO nā hiʻohiʻona machining o 904L e like me nā mea ʻē aʻe o nā kila kila austenitic. Aia ke ʻano o ka pipili a me ka paʻakikī o ka hana i ka wā o ka hana.

Pono e hoʻohana ʻia nā mea hana Carbide me ke kihi rake maikaʻi, a e hoʻohana ʻia ka ʻaila sulfurized a me ka chlorinated e like me ke ʻoki ʻoki. Aia ka lako a me ke kaʻina hana ma ke kumu o

hoemi ana i ka paakiki hana. E hōʻalo ʻia ka wikiwiki o ka ʻoki ʻana a me ka helu hānai i ka wā e ʻoki ai.

5. Hana pili:

6. Lapaau hou aku

1) Polani

2) Mākaʻikaʻi:

7 . Hoʻopili a hoʻouka ʻana:

8. Noi:

Hoʻohana ʻia ka 904L ma nā kahua aʻe:

* ʻO ka ʻaila a me nā mea hana petrochemical, e like me nā reactors i nā lako petrochemical.

* ʻO ka mālama ʻana a me ka lawe ʻana i nā lako sulfuric acid, e like me ka mea hoʻololi wela.

* Hoʻohana nui ʻia ka ʻenehana desulfurization o ke kinoea i loko o ke kino absorber, flue, shutter, internals, spraying system, etc.

*Scrubber a me ka peʻahi i loko o ka ʻōnaehana mālama waika.

*Ka mea kanu hoʻomaʻamaʻa wai kai, mea hoʻololi wela o ka wai kai, nā lako ʻoihana pepa, sulfuric acid a me nā mea hana wai nitric, hana ʻakika,

ʻoihana lāʻau lapaʻau a me nā mea hana kemika ʻē aʻe, nā ipu kaomi, nā meaʻai.

* Hale hana lāʻau lapaʻau: centrifuge, reactor, etc.

* Meaʻai meaʻai: ipu soy sauce, kuke waina, ipu paʻakai, mea hana a me nā lole.

*904L he kila hoʻohālikelike no ka dilute sulfuric acid i ke kino corrosive ikaika.