Manufacturing Method Ntawm High-strength Steel Phaj Rau Tsheb

Feb 26, 2024 Tso lus

Thaum siv cov cuab yeej txuas txuas ntxiv los tsim cov hlau phaj rau txias stamping, lubtxias dov steel phajnrog rau saum npoo dov roj tshem tawm yog rhuab nyob rau hauv lub ferrite + austenite ob-theem cheeb tsam los yog austenite ib-theem cheeb tsam. Lub ferrite ntawm cov rhuab steel phaj nyob rau hauv ob-theem cheeb tsam recrystallizes thiab cov ductility rov qab. Thaum cov txheej txheem ua kom txias sai sai, austenite hloov mus rau martensite. Txoj kev ua kom txias nrawm muaj xws li cov menyuam txias txias, dav hlau txias, dej quenching txias, thiab lwm yam. Dej quenching txias muaj qhov txias tshaj plaws thiab tuaj yeem ua kom txias txias, thiab yog qhov tsim nyog tshaj plaws rau kev tsim cov hlau tsis tshua muaj zog steel phaj.

cold-rolled steel plates

Lub martensite tsim los ntawm quenching yog tempered thaum lub sij hawm tom qab cua sov, ua rau cov hlau phaj tawv thiab kho nws hardness.

cold-rolled steel plate

Txoj kev no tuaj yeem siv los tsimhigh-strength steel ntawvnrog cov qauv dual-theem tsim los ntawm martensite, uas muab lub zog, thiab ferrite, uas muab kev ua haujlwm. Tsis tas li ntawd, yog tias qhov txias txias tau tso tseg qis dua 500 degree thiab ua kom sov thaum lub sijhawm ua kom txias los txhawb kev hloov pauv ntawm bainite, chav sov sov austenite tuaj yeem nyob hauv cov hlau. Cov hlau no uas muaj cov austenite khaws cia ua ke nrog lub zog siab nrog qhov zoo elongation vim TRIP (Transformation Induced Plasticity) nyhuv. Txhawm rau khaws cov austenite ntau ntau, kev tsim cov cementite yuav tsum raug tshem tawm, thiab vim li no, ntau Si thiab Mn yuav tsum tau ntxiv. Rau cov hlau phaj nrog cov alloying ntsiab ntxiv, steel phaj daim ntawv thov tshuab nrog guaranteed chaw weldability yam ntxwv yuav tsum tau. Txhawm rau ntxiv dag zog rau cov ntawv hlau, kev sib xyaw ua ke ntawm kev ua kom cov cua sov tsis tu ncua thiab ntxiv cov ntsiab lus austenite-tsim ua kom cov austenite feem ntau thaum cua sov.