Raws li qhov sib piv forging nce, cov pores sab hauv yog compressed thiab cov cam khwb cia dendrites yog tawg, uas ua rau muaj kev txhim kho tseem ceeb hauv longitudinal thiab transverse mechanical zog ntawm forging. Tab sis thaum lub elongation forging seem piv yog ntau dua 3-4, raws li qhov forging seem piv nce, pom tseeb fiber ntau tsim, ua rau ib tug ntse txo nyob rau hauv lub plasticity Performance index ntawm transverse mechanical zog, ua rau anisotropy ntawm forging. Yog hais tias forging seem piv yog tsawg dhau, lub forging tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua. Yog tias nws loj dhau lawm, nws ua rau kev ua haujlwm forging thiab tseem ua rau anisotropy. Yog li ntawd, xaiv qhov tsim nyog forging piv yog ib qho teeb meem tseem ceeb, thiab qhov teeb meem ntawm qhov tsis sib xws thaum lub sij hawm forging yuav tsum tau xav txog.
Qhov sib piv forging feem ntau yog ntsuas los ntawm qhov degree ntawm deformation thaum elongation. Nws yog hais txog qhov sib piv ntawm qhov ntev mus rau txoj kab uas hla ntawm cov khoom yuav tsum tau tsim, los yog qhov sib piv ntawm qhov chaw hla ntu ntawm cov khoom siv raw (los yog prefabricated billet) ua ntej forging mus rau qhov chaw hla ntawm cov khoom tiav tom qab forging. Qhov loj ntawm qhov sib piv forging cuam tshuam rau cov khoom siv ntawm cov hlau thiab qhov zoo ntawm forgings. Kev nce qhov sib piv ntawm forging yog qhov zoo rau kev txhim kho cov microstructure thiab cov khoom ntawm cov hlau, tab sis ntau tshaj forging ratios kuj tsis muaj txiaj ntsig.
Lub hauv paus ntsiab lus ntawm kev xaiv forging piv yog xaiv ib qho me me kom ntau li ntau tau thaum ua kom muaj ntau yam kev xav tau rau forgings. Qhov sib piv forging feem ntau txiav txim siab raws li cov xwm txheej hauv qab no:
- Thaum cov khoom siv zoo carbon steel thiab alloy cov qauv hlau yog dawb forged rau ntawm ib lub rauj: rau hom forgings, lawv ncaj qha forged los ntawm steel ingots, thiab forging piv xam raws li cov ntsiab lus tseem ceeb yuav tsum yog ≥ 3; Lub forging piv xam raws li flanges los yog lwm yam protruding qhov chaw yuav tsum yog ≥ 1.75; Thaum siv steel billets los yog dov cov ntaub ntawv, tus forging piv xam raws li lub ntsiab seem yog ≥ 1.5; Lub forging piv xam raws li flanges los yog lwm yam protruding qhov chaw yuav tsum yog ≥ 1.3. Rau lub nplhaib forgings, feem ntau forging piv yuav tsum yog ≥ 3. Rau disc forgings, lawv ncaj qha forged los ntawm steel ingots, nrog ib tug upsetting forging piv ntawm ≥ 3; Hauv lwm lub sijhawm, qhov kev ntxhov siab forging feem ntau yuav tsum yog> 3, tab sis cov txheej txheem kawg yuav tsum yog>.
2. High alloy steel billet ntaub tsis tsuas yog yuav tsum tau tshem tawm nws cov yam ntxwv tsis xws luag, tab sis kuj yuav tsum tau muaj ib tug ntau yam ntawm cov carbides, yog li ib tug loj forging piv yuav tsum tau saws. Lub forging piv ntawm stainless hlau tuaj yeem xaiv tau li 4-6, thaum lub forging piv ntawm high-speed steel yuav tsum yog 5-12.
Post lub sij hawm: Sep-22-2023
