1. Nto nplai cov cim
Cov yam ntxwv tseem ceeb: Kev ua tsis zoo ntawm kev tuagforgingsyuav ua rau qhov chaw ntxhib thiab cov ntses nplai. Xws li cov nplai ntses nplais tau yooj yim tsim thaum forging austenitic thiab martensitic stainless hlau.
Ua rau: Lub hauv paus mucous membrane tshwm sim los ntawm qhov tsis sib xws ntawm lubrication los yog kev xaiv lubrication tsis zoo thiab tsis zoo ntawm cov roj lubricating.
2. Kev ua yuam kev
Cov yam ntxwv tseem ceeb: Sab saum toj ntawm qhov tuag forging yog misaligned txheeb ze rau sab qis raws li qhov chaw seem.
Ua rau: Tsis muaj qhov sib npaug ntawm qhov sib npaug ntawm lub forging tuag, lossis qhov tuag forging tsis raug teeb tsa, lossis qhov sib txawv ntawm lub taub hau rauj thiab cov lus qhia kev tsheb loj dhau.
3. Tsis txaus tuag forging defects
Cov yam ntxwv tseem ceeb: Qhov loj ntawm qhov tuag forging nce nyob rau hauv cov kev taw qhia perpendicular mus rau qhov chaw parting. Thaum qhov luaj li cas tshaj qhov luaj li cas teev nyob rau hauv daim duab, tsis txaus tuag forging yuav tshwm sim.
Ua rau: Loj loj, tsis tshua muaj forging kub, hnav ntau dhau ntawm cov kab noj hniav tuag, thiab lwm yam yuav ua rau lub siab tsis txaus lossis kev tiv thaiv ntau dhau ntawm tus choj flash, cov khoom siv tsis txaus tonnage, thiab cov ntim ntau dhau.
4. Tsis txaus hauv zos filling
Cov yam ntxwv tseem ceeb: Nws feem ntau tshwm sim nyob rau hauv cov tav, convex cov ces kaum tuag, thiab lwm yam ntawm cov tuag forgings, thiab sab saum toj ntawm lub filling ib feem los yog cov ces kaum ntawm forgings tsis puv txaus, ua rau cov qauv ntawm forgings tsis meej.
Yog vim li cas: Tus tsim ntawm lub preforming tuag kab noj hniav thiab lub blanking tuag kab noj hniav yog tsis tsim nyog, cov khoom tonnage yog me me, qhov dawb paug tsis rhuab txaus, thiab cov hlau fluidity yog tsis zoo, uas tej zaum yuav ua rau qhov tsis xws luag.
5. Casting qauv residue
Cov yam ntxwv tseem ceeb: Yog tias muaj cov qauv seem seem, qhov elongation thiab qaug zog ntawm cov forgings feem ntau tsis tsim nyog. Vim hais tias ntawm qhov tsawg-magnification xeem daim, cov streamlines ntawm blocked ib feem ntawm cov residual casting yog tsis pom tseeb, thiab txawm dendritic cov khoom yuav pom, uas feem ntau tshwm sim nyob rau hauv forgings siv steel ingots li blanks.
Yog vim li cas: Vim tsis txaus forging piv lossis txoj kev forging tsis tsim nyog. Qhov tsis xws luag no txo qhov kev ua tau zoo ntawm forgings, tshwj xeeb tshaj yog cuam tshuam toughness thiab qaug zog zog.
6. Grain inhomogeneity
Cov yam ntxwv tseem ceeb: Cov nplej hauv qee qhov ntawm covforgingstshwj xeeb yog ntxhib, thaum cov nplej hauv lwm qhov me me, tsim cov nplej tsis sib xws. High-temperature alloys thiab kub-resistant steels yog tshwj xeeb tshaj yog rhiab rau grain inhomogeneity.
Ua rau: Qhov qis kawg forging kub ua rau lub zos ua hauj lwm hardening ntawm high-temperature alloy billet. Thaum lub sij hawm quenching thiab cua sov txheej txheem, ib co nplej loj hlob heev los yog thawj forging kub yog siab dhau heev lawm, thiab lub deformation tsis txaus, ua rau lub deformation degree ntawm lub zos cheeb tsam poob rau hauv ib tug tseem ceeb deformation. Qhov tsis sib xws ntawm cov nplej tau yooj yim ua rau txo qis kev ua haujlwm qaug zog thiab ua haujlwm ntev.
7. Folding tsis xws luag
Cov yam ntxwv tseem ceeb: Cov streamlines yog khoov ntawm lub folds ntawm qhov qis-magnification specimen, thiab cov folds zoo ib yam li cov kab nrib pleb. Yog hais tias nws yog tawg, cov streamlines yuav raug txiav ob zaug. Ntawm cov qauv loj loj, tsis zoo li hauv qab ntawm qhov tawg, ob sab yog oxidized hnyav heev thiab cov quav hauv qab yog blunt.
Ua rau: Nws yog feem ntau tshwm sim los ntawm kev pub me me, txo qis ntau dhau los yog lub vojvoog me me dhau ntawm lub qhov cub tawg thaum lub sij hawm tsim cov pas nrig forgings thiab crankshaft forgings. Folding defects ua rau oxidized nto hlau fuse ua ke thaum lub sij hawm forging txheej txheem.
8. Tsis tsim nyog forging streamline faib
Lub ntsiab nta: Streamline turbulence xws li streamline reflux, eddy tam sim no, disconnection, thiab convection tshwm sim thaum lub forging yog tsawg zog.
Ua rau: Kev tsim tsis raug tuag, kev xaiv tsis raug ntawm txoj kev forging, cov duab tsis tsim nyog thiab qhov loj me.
9. Banded qauv
Cov yam ntxwv tseem ceeb: Ib qho qauv uas lwm cov qauv lossis ferrite theem hauv forgings raug faib rau hauv pawg. Nws tsuas yog muaj nyob rau hauv austenitic-ferritic stainless hlau, semi-martensitic steel thiab eutectoid hlau.
Ua rau: Qhov no yog tshwm sim los ntawm forging deformation thaum ob pawg ntawm cov khoom sib koom ua ke. Nws txo qhov transverse plasticity Performance index ntawm cov khoom thiab yog nquag mus tawg raws ferrite cheeb tsam los yog ciam teb ntawm ob theem.
Post lub sij hawm: Jun-13-2024