Kev faib tawm ntawm Cov Hlau Stainless

Raws li nws cov qauv metallographic, cov hlau tsis xeb tuaj yeem muab faib ua austenitic stainless hlau, ferritic stainless hlau, martensitic stainless hlau thiab duplex stainless hlau.

(1) Cov hlau tsis xeb Austenitic

Cov qauv kub hauv chav ntawm austenitic stainless hlau yog austenite, uas yog tsim los ntawm kev ntxiv nickel tsim nyog rau cov hlau chromium siab.

Cov hlau tsis xeb Austenitic muaj cov qauv austenite ruaj khov tsuas yog thaum Cr muaj li ntawm 18%, Ni 8% txog 25%, thiab C li ntawm 0.1%. Cov hlau tsis xeb Austenitic yog ua los ntawm Cr18Ni9 hlau-raws li alloy. Nrog rau kev siv sib txawv, rau series ntawm austenitic stainless hlau tau tsim.

Cov qib dav dav ntawm cov hlau austenitic stainless hlau:
(1) 1Cr17Mn6Ni15N; (2) 1Cr18Mn8Ni5N; (3) 1Cr18Ni9; (4) 1Cr18Ni9Si3; (5) 06Cr19Ni10; (6) 00Cr19Ni10; (7) 0Cr19Ni9N; (8) 0Cr19Ni10NbN; (9) 00Cr18Ni10N; (10) 1Cr18Ni12; (11) 0Cr23Ni13; (12) 0Cr25Ni20; (13) 0Cr17Ni12Mo2; (14) 00Cr17Ni14Mo2; (15) 0Cr17Ni12Mo2N; (16) 00Cr17Ni13Mo2N; (17) 1Cr18Ni12Mo2Ti; (18) 0Cr; 1Cr18Ni12Mo3Ti; (20) 0Cr18Ni12Mo3Ti; (21) 0Cr18Ni12Mo2Cu2; (22) 00Cr18Ni14Mo2Cu2; (23) 0Cr19Ni13Mo3; (24) 00Cr19Ni13Mo3; (25) 0Cr18Ni16Mo5; (26) 1Cr18Ni9Ti; (27) (29) 0Cr18Ni; 0Cr18Ni13Si4;

Cov hlau tsis xeb Austenitic muaj ntau Ni thiab Cr, ua rau cov hlau austenite nyob rau hauv chav tsev kub. Nws muaj cov yas zoo, tawv, weldability, corrosion tsis kam thiab tsis muaj hlau nplaum lossis tsis muaj zog hlau nplaum. Nws muaj corrosion zoo hauv oxidizing thiab txo cov xov xwm. Nws yog siv los ua cov khoom siv acid-resistant, xws li cov thawv corrosion-resistant thiab cov khoom siv hauv pem teb thiab kev thauj mus los. Cov kav dej, cov khoom siv nitric acid-resistant, thiab lwm yam, kuj tuaj yeem siv ua cov khoom siv tseem ceeb ntawm cov khoom dai kom zoo nkauj. Cov hlau tsis xeb Austenitic feem ntau siv cov tshuaj kho, uas yog, cov hlau raug cua sov rau 1050 txog 1150 ° C, thiab tom qab ntawd dej-txias lossis cua-txias kom tau txais cov qauv austenite ib theem.

(2) ferritic stainless hlau

Cov qib siv feem ntau ntawm cov hlau tsis xeb ferritic: (1) 1Cr17; (2) 00Cr30Mo2; (3) 00Cr17; (4) 00Cr17; (5) 1Cr17Mo; (6) 00Cr27Mo;

Ferritic stainless hlau yog stainless hlau uas nws cov qauv feem ntau yog ferrite ntawm chav tsev kub. Chromium cov ntsiab lus yog 11% -30%, nws qhov kev tiv thaiv corrosion, toughness thiab weldability nce nrog qhov nce ntawm chromium cov ntsiab lus, chloride kev ntxhov siab corrosion tsis kam zoo dua li lwm hom stainless hlau, hom hlau no feem ntau tsis muaj nickel, qee zaum nws kuj muaj me ntsis Mo, Ti, Nb thiab lwm yam ntsiab lus. Hom hlau no muaj cov yam ntxwv ntawm thermal conductivity loj, me me expansion coefficient, zoo oxidation tsis kam, thiab zoo heev kev ntxhov siab corrosion tsis kam. Nws feem ntau yog siv los tsim atmospheric tsis kam, dej pa, dej thiab oxidizing acids. Corroded qhov chaw. Txawm li cas los xij, cov khoom siv kho tshuab thiab cov txheej txheem kev ua tau zoo tsis zoo, thiab lawv feem ntau siv rau hauv cov qauv acid-resistant nrog me ntsis kev ntxhov siab thiab ua cov hlau tiv thaiv oxidation. Nws kuj tseem tuaj yeem tsim cov khoom uas ua haujlwm ntawm qhov kub siab, xws li cov khoom siv roj turbine.