Cov txheej txheem tsim khoom ntawm cov hlau tsis xeb: los ntawm cov khoom siv raw mus rau cov khoom tiav

Cov hlau tsis xeb yog ib yam khoom siv tau ntau yam siv dav hauv ntau yam lag luam vim nws lub zog ruaj khov, tiv taus corrosion thiab lub zog tensile siab. Kev nkag siab txog cov txheej txheem tsim khoom ntawm cov hlau tsis xeb los ntawm cov khoom siv raw mus rau cov khoom tiav lawm yog qhov tseem ceeb. Tsab xov xwm no yuav muab kev qhia tob txog txoj kev tsim khoom ntawm cov hlau tsis xeb thiab cov txheej txheem ua haujlwm koom nrog hauv cov txheej txheem tsim khoom.

Txoj kev tsim cov hlau tsis xeb pib nrog kev xaiv cov khoom siv raw. Cov khoom tseem ceeb ntawm cov hlau tsis xeb yog chromium, uas ua rau cov khoom kawg tiv taus corrosion. Tsis tas li ntawd, lwm yam khoom xws li nickel, carbon thiab manganese raug ntxiv los txhim kho cov yam ntxwv tshwj xeeb ntawm cov hlau, xws li lub zog thiab kev ua tau zoo. Cov khoom siv raw no raug ntsuas thiab sib xyaw ua ke kom raug kom ua tiav cov yam ntxwv xav tau.

Thaum cov khoom siv raw sib xyaw ua ke lawm, lawv yuav yaj mus. Cov khoom sib xyaw no yuav raug cua sov rau hauv ib puag ncig uas tswj tau zoo heev, feem ntau yog nyob rau hauv lub cub hluav taws xob. Thaum qhov kub nce siab, cov khoom siv raw yuav yaj thiab ua cov hlau tsis xeb ua kua. Cov hlau tsis xeb uas yaj lawm ces yuav raug nchuav rau hauv cov pwm kom tsim cov khoom tiav ib nrab xws li cov hlau billets lossis cov hlau ingots.

Cov kauj ruam tom ntej hauv cov txheej txheem tsim khoom yog dov kub ntawm cov khoom tiav ib nrab. Ib daim billet lossis ingot raug cua sov thiab dhau los ntawm ntau lub rollers, maj mam txo nws cov tuab. Cov txheej txheem dov kub pab txhim kho cov qauv noob ntawm cov hlau tsis xeb thiab txhim kho nws cov khoom siv kho tshuab. Qhov kev txo qhov tuab uas tau ua tiav thaum dov kub yog qhov tseem ceeb kom tau txais cov hlau tsis xeb uas xav tau.

Tom qab dov kub, cov hlau tsis xeb dhau los ntawm cov txheej txheem hu ua annealing. Annealing yog kom cua sov cov hlau tsis xeb rau qhov kub tshwj xeeb thiab khaws cia rau lub sijhawm teem tseg. Cov txheej txheem no txo ​​qhov kev ntxhov siab sab hauv, ua kom cov khoom mos thiab ua rau nws yooj yim dua. Annealing kuj txhim kho cov qauv siv lead ua thiab txhim kho kev siv tshuab thiab kev ua tau zoo ntawm cov hlau.

Tom qab annealing, cov hlau stainless hlau npaj txhij rau kev kos duab txias. Kev kos duab txias suav nrog kev kos ib txoj hlau los ntawm ntau lub pwm kom maj mam txo nws txoj kab uas hla thiab nce nws qhov ntev. Cov txheej txheem kuj tseem txhim kho qhov tiav ntawm cov hlau, tshem tawm cov kev ntxhov siab sab hauv thiab txhim kho nws cov khoom siv kho tshuab ntxiv. Cov hlau stainless hlau tuaj yeem kos ntau zaus kom ua tiav txoj kab uas hla xav tau, xyuas kom meej tias muaj kev sib xws thiab zoo.

Kauj ruam kawg hauv cov txheej txheem tsim khoom yog kev kho qhov chaw. Cov hlau tsis xeb feem ntau xav tau kev kho qhov chaw xws li pickling, passivation lossis txheej txheem txheej, nyob ntawm nws daim ntawv thov. Pickling cuam tshuam nrog kev tshem tawm cov nplai lossis cov khoom tsis huv ntawm qhov chaw ntawm cov hlau, thaum passivation tsim ib txheej oxide nyias uas ua rau muaj kev tiv thaiv corrosion. Cov txheej txheem txheej xws li electroplating lossis galvanizing kuj tseem siv tau los muab kev tiv thaiv ntxiv lossis txhim kho qhov zoo li ntawm cov hlau.