Cov txheej txheem kev kho cua sov ntawm cov yeeb nkab steel feem ntau suav nrog 5 pawg hauv qab no:

1, quenching + kub tempering (tseem hu ua quenching thiab tempering)

Cov yeeb nkab steel yog rhuab mus rau qhov kub thiab txias, yog li ntawd cov qauv hauv cov yeeb nkab steel tau hloov mus rau hauv austenite, thiab tom qab ntawd txias sai dua li qhov tseem ceeb quenching ceev, kom cov txheej txheem sab hauv ntawm cov yeeb nkab steel hloov mus rau hauv martensite, thiab tom qab ntawd. tempered nrog kub kub, thaum kawg, cov yeeb nkab steel qauv yog hloov mus rau hauv niaj hnub tempered sopranite.Cov txheej txheem no tsis tsuas yog txhim kho lub zog thiab hardness ntawm cov yeeb nkab steel, tab sis kuj organically muab lub zog, plasticity. thiab toughness ntawm steel yeeb nkab.

2, normalizing (tseem hu ua normalizing)

Tom qab cua sov cov yeeb nkab steel mus rau normalizing kub, cov txheej txheem sab hauv ntawm cov yeeb nkab steel yog tag nrho hloov mus rau hauv cov qauv austenite, thiab tom qab ntawd cov txheej txheem kev kho cua sov yog txias nrog cua raws li qhov nruab nrab. , bainite, martensite, los yog ib tug sib tov ntawm lawv.Qhov txheej txheem no yuav tsis tau tsuas yog refine grain, uniform muaj pes tsawg leeg, tshem tawm kev nyuaj siab, tab sis kuj txhim kho lub hardness ntawm steel yeeb nkab thiab nws tej kev ua tau zoo.

Normalizing + tempering

Lub steel raj yog rhuab mus rau lub normalizing kub, kom lub internal qauv ntawm lub steel raj yog kiag li hloov mus rau hauv austenite qauv, thiab ces txias nyob rau hauv cov huab cua, thiab ces tempered.Cov qauv ntawm steel yeeb nkab yog tempered ferrite + pearlite, los yog ferrite. + bainite, los yog tempered bainite, los yog tempered martensite, los yog tempered sortensite.Cov txheej txheem yuav stabilize lub internal qauv ntawm steel yeeb nkab thiab txhim kho nws cov plasticity thiab toughness.

4 ,nqi

Nws yog cov txheej txheem kev kho cua sov uas lub raj steel yog rhuab rau annealing kub thiab khaws cia rau ib lub sijhawm, thiab tom qab ntawd txias mus rau qhov kub thiab txias nrog rau qhov cub.Txo qhov hardness ntawm cov yeeb nkab steel, txhim kho nws cov plasticity, kom yooj yim rau tom qab. txiav los yog txias deformation ua; Kho cov nplej, tshem tawm cov microstructure tsis xws luag, cov qauv hauv cov qauv thiab muaj pes tsawg leeg, txhim kho kev ua haujlwm ntawm cov yeeb nkab steel lossis npaj rau cov txheej txheem tom ntej; Tshem tawm cov kev ntxhov siab sab hauv ntawm cov yeeb nkab steel tiv thaiv deformation los yog tawg.

5. Kev kho mob

Lub raj steel yog rhuab mus rau qhov kub thiab txias, kom carbides thiab alloying ntsiab yog tag nrho thiab uniformly yaj nyob rau hauv austenite, thiab ces cov hlau raj yog txias sai sai, thiaj li hais tias carbon thiab alloying ntsiab tsis muaj sij hawm los nag, thiab cov txheej txheem kev kho cua sov. ntawm ib qho austenite qauv yog tau.Kev ua haujlwm ntawm cov txheej txheem: cov qauv sab hauv ntawm cov yeeb nkab steel, cov khoom sib xyaw ntawm cov yeeb nkab steel; tshem tawm cov tawv tawv hauv cov txheej txheem ntawm kev ua haujlwm los pab txhawb cov tom ntej. txias deformation ua; Restore lub corrosion kuj ntawm stainless hlau.