Vim li cas cov cuab yeej muaj zog siab yuav tsum quenching hardness kom tau raws li qhov yuav tsum tau ua
Qee seem tiv thaiv kev nyuaj siab ntau dua qhov nruab nrab hauv qhov kev txiav txim ntawm kev hloov pauv thiab cuam tshuam kev thauj khoom xws li torsion thiab khoov. Nyob rau hauv cov ntaub ntawv ntawm kev sib txhuam, cov saum npoo txheej kuj tseem hnav tas li. Yog li ntawd, cov tseev kom muaj ntawm lub zog loj, siab hardness, hnav tsis kam thiab siab zog lub zog txwv tau muab tso rau pem hauv ntej rau txheej txheej ntawm qee qhov. Tsuas yog kev tiv thaiv nto tuaj yeem ua tau raws li qhov xav tau saum toj no. Vim tias qhov zoo ntawm deformation me me thiab cov khoom tsim muaj txiaj ntsig, nto quenching yog siv dav hauv kev tsim khoom.
Raws li txoj kev ua cua sov sib txawv, nto quenching mas suav nrog induction cua sov nto quenching, nplaim taws cua sov nto quenching, hluav taws xob tiv cua sov nto quenching, thiab lwm yam.
• induction nto hardening
Induction cua sov yog kev siv hluav taws xob hauv tshuab hluav taws xob los tsim hluav taws xob eddy tam sim no hauv qhov haujlwm thiab ua kom sov cov haujlwm. Piv nrog quenching zoo tib yam, induction saum npoo quenching muaj qhov zoo li nram no:
1. Lub tshav kub muaj nyob rau ntawm qhov chaw ua haujlwm tawm, nrog cua kub ceev ceev thiab siab ceev
2. Vim tias qhov haujlwm haujlwm tsis yog rhuab raws li kev suav, kev deformation yog me me
3. Lub sijhawm luv cua sov lub sijhawm thiab tsawg dua oxidation thiab decarburization
4. Lub zog hardness ntawm workpiece yog siab, tsis yooj yim rhiab yog me me, cuam tshuam toughness, qaug zog lub zog thiab hnav tsis kam yog zoo heev. Nws muaj txiaj ntsig zoo los txhim kho lub peev xwm ntawm cov ntaub ntawv, txuag khoom siv thiab txhim kho kev pab lub neej ntawm qhov chaw
5. Cov cuab yeej txig, kev siv yooj yim thiab kev ua haujlwm zoo
6. Kev yooj yim rau kev siv tshuab thiab kev siv tshuab
7. Nws tuaj yeem siv tsis tas rau hauv txheej kom tsis huv thiab tab sis kuj nkag mus kho cua sov thiab tshuaj kho cua sov.
Cov hauv paus ntsiab lus ntawm induction cua sov
Thaum cov haujlwm tso rau hauv qhov pib ua, thaum lub inductor hla dhau qhov hloov tam sim no, qhov chaw hloov sib nqus nrog tib zaus li qhov tam sim no yog tsim nyob ib ncig ntawm lub inductor, thiab qhov kev tsim hluav taws xob hauv lub zog tsim tawm sib haum hauv qhov chaw ua haujlwm, uas ua rau ntxias tam sim no ntawm qhov workpiece saum npoo, namely eddy tam sim no. Nyob rau hauv qhov kev txiav txim ntawm qhov tsis kam ntawm qhov kev ua haujlwm, lub zog hluav taws xob tau hloov mus rau lub zog cua sov, uas ua rau thaj chaw kub ntawm cov khoom ua haujlwm tau mus txog qhov quenching thiab cua sov kub.
• lub zog tom qab ua kom nto tawv
1. Sab saum npoo tawv: qhov nyuaj ntawm lub ntsej muag ua haujlwm tom qab qhov siab thiab nruab nrab zaus hluav taws xob cua sov feem ntau yog 2-3 qhov (HRC) siab dua li ntawm cov quenching zoo tib yam.
2. Hnav tsis kam: qhov hnav tsis kam ntawm workpieces tom qab high quenching ntau dua qhov ntawd tom qab quenching zoo tib yam. Qhov no feem ntau yog vim cov kev sib txuas ua ke ntawm cov noob me me martensite, siab carbide dispersion, siab hardness piv thiab siab compressive kev nyuaj siab nyob rau saum npoo ntawm cov txheej tawv tawv.
3. Lub zog muaj zog: lub siab thiab nruab nrab lub cev ntu quenching zoo heev txhim kho lub zog qaug zog thiab txo qhov nqis siab tshaj. Rau qhov chaw ua haujlwm nrog cov khoom qub, lub zog qaug zog nce nrog qhov nce ntawm qhov tob hauv qhov tob hauv qee qhov ntau, tab sis thaum qhov tob qhov tob dhau lawm, txheej txheej saum npoo yog compressive kev nyuaj siab, yog li ntawd lub zog qaug zog poob nrog qhov nce ntawm hardening qhov tob, thiab qhov brittleness ntawm lub workpiece nce. Qhov tob ntawm kev ua kom lub zog tawv txheej δ = (10-20)% d. Nws yog qhov tsim nyog dua, ntawm cov D. Qhov kev sib tw zoo ntawm lub ntsuas haujlwm.