Classification ntawm Stainless hlau

Stainless hlau tuaj yeem muab faib ua austenitic stainless hlau, ferritic stainless hlau, martensitic stainless hlau thiab duplex stainless hlau raws li nws cov qauv metallographic.

(1) Austenitic stainless hlau

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

Austenitic stainless hlau muaj qhov ruaj khov austenite qauv tsuas yog thaum Cr muaj li ntawm 18%, Ni 8% mus rau 25%, thiab C txog 0.1%. Austenitic stainless hlau yog raws li Cr18Ni9 hlau-raws li alloy. Nrog rau kev siv sib txawv, 6 series ntawm austenitic stainless hlau tau tsim.

Cov qib ntawm 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;

Austenitic stainless hlau muaj ntau ntau ntawm Ni thiab Cr, ua rau cov hlau austenite nyob rau hauv chav tsev kub. Nws muaj zoo plasticity, toughness, weldability, corrosion kuj thiab tsis-magnetic los yog tsis muaj zog magnetic zog. Nws muaj kev tiv thaiv corrosion zoo hauv oxidizing thiab txo cov xov xwm. Nws yog siv los ua cov khoom siv acid-resistant, xws li corrosion-resistant ntim thiab cov khoom siv hauv ob sab phlu thiab kev thauj mus los. Cov kav dej, cov khoom siv nitric acid-resistant, thiab lwm yam, kuj tuaj yeem siv los ua cov khoom tseem ceeb ntawm cov khoom dai. Austenitic stainless hlau feem ntau txais kev kho cov tshuaj, uas yog, cov hlau yog rhuab mus rau 1050 txog 1150 ° C, thiab tom qab ntawd dej-txias los yog cua-txias kom tau txais ib theem austenite qauv.

(2) ferritic stainless hlau

Feem ntau siv qib ferritic stainless hlau: (1) 1Cr17; (2) 00Cr30Mo2; (3) 00Cr17; (4) 00Cr17; (5) 1Cr17Mo; (6) 00Cr27Mo;

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