Yuav ua li cas nyuaj txav khaub ncaws hloov hlau?

Lub hardness ntawm khaub thuas kos cov hlau hloov yog feem ntau ntawm HB} 0}}}}}}}}}}, thiab cov khoom siv thev naus laus zis thiab kev kho cua sov. Cov hauv qab no yog cov ncauj lus kom ntxaws ntxaws ntawm cov ntsiab lus tseem ceeb cuam tshuam rau kev nyuaj ntawm tus mob khaub thuas txav hlau thiab nws cov ntawv thov:

1. Hardness Ntau Thiab Cov yam ntxwv
Lub hardness ntawm txias txav hlau yog qhov taw qhia tseem ceeb los ntsuas nws cov kev ua tau zoo, thiab feem ntau yog siv los ua kom muaj peev xwm ua kom muaj kev tawm tsam thiab sab nraud. Nws cov hardness ntau yog nruab nrab hb 150-300, thiab cov nqi tshwj xeeb txawv nyob ntawm cov khoom siv thiab ua cov khoom siv.

2. Cov ntsiab lus tseem ceeb cuam tshuam rau Hardness
Cov khoom siv cov khoom siv: lub ntsiab ntawm cov khaub thuas hloov cov hlau, silicon, mangelon, leej faj, phosphorus thiab lwm yam. Ntawm lawv, cov ntsiab lus ntawm carbon lub caij muaj qhov cuam tshuam tseem ceeb rau kev tawv. Qhov siab dua cov ntsiab lus carbon, ntau dua lub hardness, tab sis ntau cov ntsiab lus carbon ntau yuav ua rau cov khoom siv los ua ntau nrag.

Tshuab thev naus laus zis: kev kos txheej txheem kos duab ua rau cov khoom siv yas yas ntawm cov khoom siv, yog li nce lub hardness thiab lub zog. Kev kho cua sov (xws li normalizing, quenching, thiab tempering) txuas ntxiv hloov cov ntaub ntawv tus qauv thiab cov khoom.
Kev kho kho cua sov: kev kho cua sov sib txawv muaj cov kev cuam tshuam sib txawv ntawm lub hardness. Piv txwv li, quenching tuaj yeem nce lub zog tab sis yuav txo qis; Tempering tuaj yeem txo qis hardness thaum nce nruj.
3. Daim ntawv thov teb
Txias kev kos cov hlau yog siv dav hauv cov teb hauv qab no vim nws cov khoom siv ua haujlwm zoo heev thiab cov neeg kho tshuab:

Kev tsim tshuab: xws li bearings, zog, bolts thiab lwm qhov chaw uas xav tau withstand siab thiab coj kev tiv thaiv siab.
Kev tsim kho cov tshuab tsim: xws li cov qauv hlau, txhawb nqa qauv thiab lwm yam ntaub ntawv uas xav tau lub hardness siab thiab tawv.
4. Cov ntaub ntawv tshwj xeeb thiab hardness
For example, the hardness of No. 20 round steel is 131-156HBS, the hardness before treatment is Less than or equal to 143HBS, and the hardness after treatment is Less than or equal to 131HBS. Qhov no qhia tau hais tias qhov nyuaj ntawm kev hloov khaub ncaws khaub thuas-hloov cov hlau ntawm cov khoom sib txawv yuav sib txawv.

Hauv cov ntsiab lus, qhov nyuaj ntawm cov hlau txias-kos cov hlau cuam tshuam nrog ntau yam, thiab tus nqi tshwj xeeb xav tau raws li cov khoom muaj pes tsawg leeg, kev kho mob thev naus laus zis thiab kev kho cua sov. Yog tias koj xav paub ntau ntxiv txog kev tawv tawv ntawm cov ntaub ntawv tshwj xeeb, koj tuaj yeem tshawb rau No. 20 puag ncig hlau lossis txias-kos cov khoom siv hlau.