Kev npaj cov txheej txheem thiab cov qauv txheej txheem ntawm av Sib Tsoo Media Pob

Technical standard:

1. Txawm hais tias qhov sib tsoo steel pob yog hnav-tiv taus, cov ntaub ntawv tseem ceeb tshaj plaws yog kev sim hardness, uas tuaj yeem sim nrog Rockwell hardness tester. Kev xyaum qhia tau hais tias lub neej kev pab cuam ntawm cov pob steel saum HRC60 yog ob zaug ntawm HRC40-50.

2. Tsawg-chromium steel npas xa mus rau cov pob steel nrog cov ntsiab lus chromium ntawm ≤3.0% thiab cov ntsiab lus carbon ntawm 1.80% -3.30%. Lub teb chaws tus qauv xav kom lub hardness (HRC) ntawm lub pob uas tsis muaj chromium yuav tsum yog ≥45 degrees. Yog tias qhov zoo ntawm cov pob chromium tsawg tau lees paub, nws raug nquahu kom siv kev kho cua sov tempering lossis kev co kev laus. Yog tias qhov kev sim hardness (HRC) qis dua 40 degrees, nws qhia tau hais tias lub pob chromium qis tsis txaus los yog kub dhau.

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