Cov khoom siv yog G3 Hastelloy -} kev paub

1.What cov khoom siv G3 hastelloy?

G3 Hastelloy yog aNickel - chromium - molybdenum (ni {}} mo) alloynrog ib qho me me ntxiv ntxiv rau. Nws yog hom superalalloy tsim rau kev txhim kho corrosion tsis kam nyob rau hauv ib puag ncig hnyav, tshwj xeeb tshaj yog oxidizing, txo, thiab sib xyaw acid tawm.

Nws cov yam ntxwv tseem ceeb ua rau nws dav hauv kev lag luam xws li kev ua yeeb yam, petrochemicals, thiab flue roj desulfurization tshuab. Nws ua ke cov corrosion tsis kam ntawm nibel - Raws li cov khoom siv zoo li sulfuric acid, thiab phosphoric acid, thiab phosphoric acid, thiab phosphoric acid, thiab phosphoric acid, thiab phosphoric acid, thiab phosphoric acid, thiab phosphoric acid, thiab phosphoric acid, thiab phosphoric acid, thiab phosphoric acid, thiab phosphoric acid, thiab phosphoric acid, thiab phosphoric acid, thiab phosphoric acid, thiab phosphoric acid, thiab kua qaub.

2.Qhov yog cov tshuaj lom neeg muaj pes tsawg leeg ntawm G3 Hastelloy?

Cov tshuaj lom neeg muaj pes tsawg leeg ntawm G3 Hastelloy ua raws cov qauv thoob ntiaj teb (piv txwv li ASTM B625, tsis yog N06985). Cov lus hauv qab no teev nws qhov sib xyaw ua ke (hauv qhov hnyav feem pua, wt%):

Lub ntsiab	Cov ntsiab lus ntau	Lub luag hauj lwm
Npib tsib caug (ni)	Ntau dua los yog sib npaug rau 48.0	Base Eles, muab cov ntsiab corrosion tsis kam thiab alloy stability.
Chromium (cr)	21.0 - 23.5	Txhim kho cov oxidation tsis kam thiab tiv taus oxidizing cov kua qaub.
Molybdenum (mo)	6.0 - 8.0	Txhim kho kom tiv thaiv kom txo qis acids (piv txwv li, hydrochloric acid) thiab pitting corrosion.
Tooj Liab (Cu)	1.5 - 2.5	Txhim kho kom tsis kam rau sulfuric acid thiab hydrochloric acid.
Hlau (FE)	18.0 - 21.0	Txhim kho cov tshuab muaj zog thiab weldability.
Tungsten (w)	0.2 - 1.0	Pab Molybdenum hauv kev txhim kho corrosion tsis kam thiab hnav tsis kam.
Carbon (c)	Tsawg dua los yog sib npaug rau 0.015	Tsawg cov pa roj carbon cov ntsiab lus txo qhov kev pheej hmoo ntawm carbide nag lossis daus thaum lub sij hawm vuam, zam kev corrosion.
Silicon (si)	Tsawg dua los yog sib npaug rau 0.80	Txhim kho kev ua yeeb yam casting (rau cam khwb cia alloys) tab sis yog tswj kom tsis txhob muaj brittleness.
Manganese (MN)	Tsawg dua los yog sib npaug rau 1.0	AIDS hauv Deagidation thaum lub sij hawm alloy smelting, nrog tsawg heev rau corrosion tsis kam.
Phosphorus (p)	Tsawg dua los yog sib npaug rau 0.030	Impurity lub sij hawm, nruj me ntsis tswj kom tiv thaiv brittleness.
Sulphur (s)	Tsawg dua los yog sib npaug rau 0.015	Ipurity lub caij, tswj kom tsis txhob txo cov corrosion tsis kam thiab weldability.

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3.Qhov yog lub hardness ntawm G3 hastelloy?

Lub hardness ntawm g3 hastelloy txawv nyob ntawm nwsKev Kho Cua Sov Lub XeevThiab seb nws puas tau dhau los ua haujlwm txias. Hauv qab no yog cov kev ua kom nruj ib txwm rau cov xeev:

Annealed xeev

Nov yog lub xeev G3 feem ntau, raws li Annealing Relieves sab hauv kev ntxhov siab thiab kev ua kom zoo corrosion.

Brinell Hardness (HB): Kwv yees li 180 - 220 hb.

Rockwell Hardness (HRC): Kwv yees li 17 - 25 hrc.

Vickers Hardness (HV): Kwv yees li 190 - 230 hv.

Txias -} Ua haujlwm lub xeev

Txias ua haujlwm (piv txwv li, dov, Forging, zam) Tshais kom cov alloy lub hardness thiab lub zog tab sis yuav txo qis nws ductility.

Lub hardness tuaj yeem nce los ntawm 30% - 50}}}} piv rau anealed lub xeev. Piv txwv li, lub brinell hardness yuav mus txog 240 - 300 hb, thiab rockwell hardness yuav mus txog {}} hrc.

Welded pob qij txha

Lub hardness ntawm welded sib koom tes feem ntau zoo ib yam li lossis me ntsis siab dua li lub hauv paus hlau hauv lub xeev annealed. Tus ncej zoo - weld kev kho cua sov tuaj yeem kho lub hardness thiab tiv thaiv kev txhim kho intergranular.