Ua hauj lwm hardening
(1) Ua rau kev ua haujlwm tawv tawv sib txawv ntawm cov yas deformation yuav tshwm sim hauv txheej txheej txheej txheej thaum txiav
Kev deformation hnyav yuav hloov cov khoom ua haujlwm ntawm cov khoom yuav raug txiav. Kev txiav ntug ntawm txhua lub cuab yeej tsis tuaj yeem raug sharpened kiag li, thaum txiav, extrusion thiab kev sib txhuam ntawm blunt arc txiav ntug thiab nws lub ntsej muag flank uas nyob ib sab, cov hlau hais nyob rau hauv machined nto yog twisted, extruded thiab tawg, raws li qhia nyob rau hauv daim duab { {0}}, qhov tshwm sim ntawm qhov ua kom tawv tawv ntawm txheej txheej vim yog cov yas deformation hnyav hu ua work hardening, los yog txias ua hauj lwm hardening. Tom qab hardening, yield zog ntawm cov khoom hlau yog nce, thiab microcracks thiab residual stresses tshwm nyob rau hauv machined nto, txo cov qaug zog ntawm cov khoom.
(2) Cov yam ntxwv cuam tshuam rau kev ua haujlwm hardening:
1) Txhim kho lub kaum sab xis ntawm lub cuab yeej, txo lub vojvoog ntawm obtuse lub voj voog ntawm lub cuab yeej, thiab txo cov yas deformation ntawm cov hlau ntawm cov txheej txiav, yog li txo qhov kev ua haujlwm hardening ntawm lub workpiece.
2) Qhov ntau dua cov yas ntawm cov khoom siv ua haujlwm thiab qhov ntau dua qhov kev txhawb zog, qhov hnyav dua qhov tawv. Rau cov pa roj carbon monoxide dav hlau, cov ntsiab lus carbon tsawg dua, ntau dua cov yas, thiab qhov hnyav dua qhov tawv. Lub zog Performance index ntawm siab manganese steel Mn12 yog loj heev, thiab hardness ntawm machined nto yog nce los ntawm ntau tshaj 2 zaug tom qab txiav; Cov hlau tsis muaj hlau tsis muaj cov hlau tsis muaj melting point thiab yooj yim kom tsis muaj zog, thiab kev ua hauj lwm hardening yog ntau sib dua li cov qauv hlau, tooj liab qhov chaw yog 30% me dua steel qhov chaw, thiab txhuas qhov chaw yog li ntawm 75% me dua steel qhov chaw.
3) Thaum cov khoom noj yog qhov loj, qhov txiav quab yuam nce, cov yas deformation ntawm txheej txheej hlau intensifies, thiab cov degree ntawm hardening nce.
4) Thaum txiav ceev nce, cov yas deformation txo, cov yas deformation cheeb tsam kuj txo, thiab yog li ntawd, qhov tob ntawm txheej hardened txo. Ntawm qhov tod tes, thaum txiav ceev nce, qhov txiav kub nce thiab cov txheej txheem tshuaj accelerates. Txawm li cas los xij, qhov nce hauv kev txiav ceev yuav ua rau lub sijhawm ua kom sov, yog li nws lig dhau lawm kom tsis muaj zog. Thaum qhov ntsuas kub siab tshaj Ac, cov txheej txheem txheej txheej saum npoo yuav tsim ib theem kev hloov pauv thiab tsim cov qauv quenching. Yog li ntawd, qhov tob thiab degree ntawm hardening yuav nce. Qhov tob ntawm txheej hardened thawj zaug txo nrog qhov nce ntawm kev txiav ceev, thiab tom qab ntawd nce nrog qhov nce ntawm kev txiav ceev.
Kev ntsuas cua txias thiab lubrication zoo tuaj yeem siv los txo qhov tob ntawm cov txheej txheem ua haujlwm hardening.
