Tej teeb meem thiab kev kho mob ntawm cov khoom siv hluav taws xob ntau zaus for ingots and bars

1. Decarbonization

Decarburization feem ntau yog tshwm sim los ntawm decarburization ntawm cov khoom siv raw nws tus kheej tshaj li qhov yuav tsum tau ua. Yog li ntawd, peb yuav tsum ntxiv dag zog rau kev soj ntsuam zoo ntawm cov khoom siv raw ua ntej kev kho cua sov.

Qhov thib ob, lub microstructure tsis tsim nyog (quenched martensite koob yog tuab) Qhov kev tsis zoo no feem ntau tshwm sim los ntawm qhov kub thiab txias. Yog li ntawd, nyob rau hauv cov txheej txheem ntawm kev kho cua sov siv lub high-frequency quenching rauv, peb yuav tsum tsim nyog txo cov cua kub kom zoo kom paub tseeb tias cov cua kub kub raws li qhov yuav tsum tau.

3. Deformation out of tolerance The causes and preventive measures are as follows:

1. Cov kev ntxhov siab annealing tsis txaus. Yog li ntawd, peb yuav tsum siv lub tshuab hluav taws xob ntau zaus quenching rau kev kho annealing txaus. co thaum cua sov los yog txias, yog li ntawd, peb yuav tsum xyuas kom meej tias lub workpiece nkag mus rau hauv lub txias nruab nrab vertically thaum ua hauj lwm los tiv thaiv lub spindle los ntawm kev sib tsoo nrog lwm yam khoom.

2. Yog hais tias lub preheating kub tsis sib npaug los yog lub sij hawm luv luv, peb yuav tsum xaiv ib tug preheating rauv nrog zoo kub uniformity, thiab lub sij hawm preheating yuav tsum txaus.

4. Tsawg hardness los yog tsis sib xws hardness

The reasons for this defect and its preventive measures are as follows: The quenching temperature is low or the heating time is short, we should strictly implement the requirements of the heat treatment process parameters. The cooling speed is slow or the cooling medium is not suitable. Therefore, during the quenching heat treatment, we should quickly Parts are picked out for graded quenching to avoid excessive air cooling time, and a reasonable cooling medium should be selected.

5. Kev tawg

Cov laj thawj rau kev puas tsuaj ntawm pob txha thiab lawv cov kev tiv thaiv yog raws li hauv qab no: quenching kub yog txawv txav, yog li thaum siv lub tshuab hluav taws xob quenching rau quenching cua sov, peb yuav tsum nruj me ntsis siv cov txheej txheem kev kho cua sov. Lub koom haum ntawm cov khoom siv raw yog tsis tsim nyog, yog li ntawd, peb yuav tsum tshuaj xyuas lub koom haum ntawm cov khoom siv raw kom ntseeg tau tias nws ua tau raws li qhov yuav tsum tau ua ua ntej nws tuaj yeem muab tso rau hauv ntau lawm.