Siv lub tshuab ntsuas hluav taws xob scanning los soj ntsuam qhov tawg ntawm qhov qaug zog thiab tshuaj xyuas qhov tawg ntawm cov hlau; tib lub sijhawm, kev sim qaug zog ntawm cov hlau uas tau decarburized tau ua tiav rau ntawm cov qauv decarburized ntawm qhov kub sib txawv los sib piv lub neej qaug zog ntawm cov hlau sim nrog thiab tsis muaj decarburization, thiab los tshuaj xyuas qhov cuam tshuam ntawm decarburization rau kev ua haujlwm qaug zog ntawm cov hlau sim. Cov txiaj ntsig qhia tau tias, vim muaj kev sib xyaw ua ke ntawm oxidation thiab decarburization hauv cov txheej txheem cua sov, kev sib cuam tshuam ntawm ob qho, ua rau cov txheej txheem decarburized tag nrho tuab nrog kev loj hlob ntawm qhov kub thiab txias qhia txog kev nce thiab tom qab ntawd txo qis, cov txheej txheem decarburized tag nrho ncav cuag tus nqi siab tshaj plaws ntawm 120 μm ntawm 750 ℃, thiab cov txheej txheem decarburized tag nrho ncav cuag tus nqi tsawg kawg nkaus ntawm 20 μm ntawm 850 ℃, thiab qhov txwv qaug zog ntawm cov hlau sim yog li 760 MPa, thiab qhov chaw ntawm cov kab nrib pleb qaug zog hauv cov hlau sim yog feem ntau Al2O3 cov khoom tsis yog hlau; Tus cwj pwm decarburization txo qis lub neej qaug zog ntawm cov hlau sim, cuam tshuam rau kev ua haujlwm qaug zog ntawm cov hlau sim, qhov tuab dua ntawm cov txheej decarburization, qhov qis dua lub neej qaug zog. Txhawm rau kom txo qhov cuam tshuam ntawm cov txheej decarburization rau kev ua haujlwm qaug zog ntawm cov hlau sim, qhov kub kho cua sov zoo tshaj plaws ntawm cov hlau sim yuav tsum tau teeb tsa ntawm 850 ℃.
Cov iav yog ib qho tseem ceeb ntawm lub tsheb,vim yog kev ua haujlwm ntawm qhov ceev ceev, qhov meshing ntawm qhov chaw iav yuav tsum muaj lub zog siab thiab kev tiv thaiv kev sib txhuam, thiab cov hauv paus hniav yuav tsum muaj kev ua haujlwm zoo vim yog qhov kev thauj khoom rov ua dua tas li, txhawm rau kom tsis txhob muaj kab nrib pleb uas ua rau cov khoom tawg. Kev tshawb fawb qhia tau hais tias decarburization yog ib qho tseem ceeb uas cuam tshuam rau kev ua haujlwm ntawm kev sib hloov ntawm cov khoom siv hlau, thiab kev ua haujlwm ntawm kev sib hloov ntawm kev sib hloov yog qhov qhia tseem ceeb ntawm cov khoom zoo, yog li nws yog qhov tsim nyog los kawm txog tus cwj pwm decarburization thiab kev ua haujlwm ntawm kev sib hloov ntawm cov khoom siv sim.
Hauv tsab ntawv no, lub cub tawg kho cua sov ntawm 20CrMnTi iav hlau qhov chaw decarburization xeem, tshuaj xyuas qhov kub thiab txias sib txawv ntawm qhov tob ntawm txheej decarburization xeem hlau ntawm kev hloov pauv txoj cai; siv QBWP-6000J yooj yim beam qaug zog xeem tshuab ntawm kev xeem hlau rotary bending qaug zog xeem, kev txiav txim siab ntawm kev xeem hlau qaug zog kev ua tau zoo, thiab tib lub sijhawm los tshuaj xyuas qhov cuam tshuam ntawm decarburization rau kev ua tau zoo qaug zog ntawm kev xeem hlau rau qhov tseeb ntau lawm los txhim kho cov txheej txheem ntau lawm, txhim kho qhov zoo ntawm cov khoom thiab muab cov ntaub ntawv tsim nyog. Kev xeem hlau qaug zog kev ua tau zoo yog txiav txim siab los ntawm lub tshuab spin bending qaug zog xeem tshuab.
1. Cov ntaub ntawv thiab cov txheej txheem sim
Cov khoom siv kuaj rau ib chav tsev los muab 20CrMnTi iav hlau, cov tshuaj lom neeg tseem ceeb raws li qhia hauv Rooj 1. Kev kuaj decarburization: cov khoom siv kuaj raug ua tiav rau hauv Ф8 hli × 12 hli cylindrical qauv, qhov chaw yuav tsum ci tsis muaj stains. Lub cub tawg kho cua sov tau cua sov rau 675 ℃, 700 ℃, 725 ℃, 750 ℃, 800 ℃, 850 ℃, 900 ℃, 950 ℃, 1,000 ℃, rau hauv cov qauv thiab tuav 1 teev, thiab tom qab ntawd cua txias rau chav sov. Tom qab kev kho cua sov ntawm cov qauv los ntawm kev teeb tsa, sib tsoo thiab polishing, nrog 4% ntawm nitric acid cawv daws kev yaig, kev siv metallurgical microscopy los soj ntsuam cov hlau kuaj decarburization txheej, ntsuas qhov tob ntawm decarburization txheej ntawm ntau qhov kub. Kev sim qaug zog ntawm kev khoov tig: cov khoom siv sim raws li qhov yuav tsum tau ua ntawm ob pawg ntawm cov qauv qaug zog ntawm kev khoov tig, thawj pawg tsis ua qhov kev sim decarburization, pawg thib ob ntawm kev sim decarburization ntawm qhov kub sib txawv. Siv lub tshuab sim qaug zog ntawm kev khoov tig, ob pawg ntawm cov hlau sim rau kev sim qaug zog ntawm kev khoov tig, kev txiav txim siab ntawm qhov txwv qaug zog ntawm ob pawg ntawm cov hlau sim, kev sib piv ntawm lub neej qaug zog ntawm ob pawg ntawm cov hlau sim, kev siv lub tshuab scanning electron microscope kev soj ntsuam qaug zog tawg, tshuaj xyuas cov laj thawj rau qhov tawg ntawm cov qauv, los tshawb nrhiav cov nyhuv ntawm kev decarburization ntawm cov khoom qaug zog ntawm cov hlau sim.
Rooj 1 Cov tshuaj lom neeg muaj pes tsawg leeg (feem pua ntawm cov hlau sim wt%
Cov nyhuv ntawm qhov kub thiab txias ntawm kev decarburization
Cov morphology ntawm decarburization lub koom haum nyob rau hauv ntau yam kub cua sov yog qhia nyob rau hauv daim duab 1. Raws li pom tau los ntawm daim duab, thaum qhov kub yog 675 ℃, qhov chaw qauv tsis tshwm sim decarburization txheej; thaum qhov kub nce mus txog 700 ℃, qhov chaw qauv decarburization txheej pib tshwm sim, rau cov nyias ferrite decarburization txheej; nrog rau qhov kub nce mus txog 725 ℃, qhov chaw qauv decarburization txheej thickness nce ntau heev; 750 ℃ decarburization txheej thickness ncav cuag nws qhov siab tshaj plaws, lub sijhawm no, cov noob ferrite yog ntau dua, coarse; thaum qhov kub nce mus txog 800 ℃, qhov decarburization txheej thickness pib txo qis ntau heev, nws cov thickness poob rau ib nrab ntawm 750 ℃; thaum qhov kub txuas ntxiv nce mus txog 850 ℃ thiab qhov tuab ntawm decarburization yog qhia nyob rau hauv daim duab 1. 800 ℃, tag nrho decarburization txheej thickness pib txo qis ntau heev, nws cov thickness poob rau 750 ℃ thaum ib nrab; Thaum qhov kub tseem nce mus txog 850 ℃ thiab siab dua, cov hlau sim tag nrho cov txheej txheem decarburization tseem txo qis, ib nrab cov txheej txheem decarburization pib maj mam nce mus txog thaum cov txheej txheem decarburization tag nrho ploj mus, ib nrab cov txheej txheem decarburization maj mam meej. Nws tuaj yeem pom tias qhov tuab ntawm cov txheej txheem decarburized tag nrho nrog rau qhov nce ntawm qhov kub tau nce thawj zaug thiab tom qab ntawd txo qis, qhov laj thawj rau qhov tshwm sim no yog vim cov qauv hauv cov txheej txheem cua sov tib lub sijhawm oxidation thiab decarburization tus cwj pwm, tsuas yog thaum tus nqi decarburization sai dua qhov ceev ntawm oxidation yuav tshwm sim decarburization phenomenon. Thaum pib cua sov, qhov tuab ntawm cov txheej txheem decarburized tag nrho nce maj mam nrog rau qhov nce ntawm qhov kub kom txog thaum qhov tuab ntawm cov txheej txheem decarburized tag nrho mus txog qhov siab tshaj plaws, lub sijhawm no txuas ntxiv nce qhov kub, tus nqi oxidation ntawm cov qauv sai dua li tus nqi decarburization, uas cuam tshuam kev nce ntawm cov txheej txheem decarburized tag nrho, ua rau muaj kev sib txawv qis. Nws tuaj yeem pom tias, nyob rau hauv qhov ntau ntawm 675 ～ 950 ℃, tus nqi ntawm qhov tuab ntawm cov txheej decarburized tag nrho ntawm 750 ℃ yog qhov loj tshaj plaws, thiab tus nqi ntawm qhov tuab ntawm cov txheej decarburized tag nrho ntawm 850 ℃ yog qhov me tshaj plaws, yog li ntawd, qhov kub ntawm cov hlau sim raug pom zoo kom yog 850 ℃.
Daim Duab 1 Histomorphology ntawm cov txheej decarburized ntawm cov hlau sim uas tuav ntawm qhov kub sib txawv rau 1 teev
Piv nrog rau cov txheej semi-decarburized, qhov tuab ntawm cov txheej decarburized tag nrho muaj qhov cuam tshuam tsis zoo rau cov khoom siv, nws yuav txo cov khoom siv kho tshuab ntawm cov khoom siv, xws li txo qhov muaj zog, qhov nyuaj, kev tiv thaiv kev hnav thiab kev qaug zog, thiab lwm yam, thiab tseem ua rau muaj kev cuam tshuam rau cov kab nrib pleb, cuam tshuam rau qhov zoo ntawm kev vuam thiab lwm yam. Yog li ntawd, kev tswj qhov tuab ntawm cov txheej decarburized tag nrho yog qhov tseem ceeb heev rau kev txhim kho kev ua haujlwm ntawm cov khoom. Daim duab 2 qhia txog qhov sib txawv ntawm cov tuab ntawm cov txheej decarburized tag nrho nrog qhov kub, uas qhia txog qhov sib txawv ntawm cov tuab ntawm cov txheej decarburized tag nrho kom meej dua. Nws tuaj yeem pom los ntawm daim duab tias qhov tuab ntawm cov txheej decarburized tag nrho tsuas yog li 34μm ntawm 700 ℃; nrog rau qhov kub nce mus txog 725 ℃, qhov tuab ntawm cov txheej decarburized tag nrho nce mus txog 86 μm, uas yog ntau dua ob npaug ntawm cov tuab ntawm cov txheej decarburized tag nrho ntawm 700 ℃; Thaum qhov kub nce mus txog 750 ℃, qhov tuab ntawm cov txheej decarburized tag nrho Thaum qhov kub nce mus txog 750 ℃, qhov tuab ntawm cov txheej decarburized tag nrho ncav cuag tus nqi siab tshaj plaws ntawm 120 μm; thaum qhov kub txuas ntxiv nce, qhov tuab ntawm cov txheej decarburized tag nrho pib txo qis, mus rau 70 μm ntawm 800 ℃, thiab tom qab ntawd mus rau qhov tsawg kawg nkaus ntawm kwv yees li 20μm ntawm 850 ℃.
Daim Duab 2 Qhov tuab ntawm cov txheej decarburized tag nrho ntawm qhov kub sib txawv
Cov nyhuv ntawm decarburization rau kev ua haujlwm qaug zog hauv kev khoov tig
Yuav kom kawm txog qhov cuam tshuam ntawm decarburization rau cov khoom qaug zog ntawm cov hlau caij nplooj ntoos hlav, ob pawg ntawm kev sim qaug zog ntawm kev sib hloov tau ua tiav, thawj pawg tau sim qaug zog ncaj qha yam tsis muaj decarburization, thiab pawg thib ob tau sim qaug zog tom qab decarburization ntawm tib theem kev ntxhov siab (810 MPa), thiab cov txheej txheem decarburization tau tuav ntawm 700-850 ℃ rau 1 teev. Pawg thawj zaug ntawm cov qauv tau qhia hauv Rooj 2, uas yog lub neej qaug zog ntawm cov hlau caij nplooj ntoos hlav.
Lub neej qaug zog ntawm thawj pawg ntawm cov qauv tau qhia hauv Rooj 2. Raws li tuaj yeem pom los ntawm Rooj 2, yam tsis muaj decarburization, cov hlau sim tsuas yog raug rau 107 lub voj voog ntawm 810 MPa, thiab tsis muaj kev tawg; thaum qib kev ntxhov siab tshaj 830 MPa, qee qhov qauv pib tawg; thaum qib kev ntxhov siab tshaj 850 MPa, cov qauv qaug zog tau tawg tag nrho.
Rooj 2 Lub neej qaug zog nyob rau hauv ntau qib kev ntxhov siab (tsis muaj decarburization)
Yuav kom txiav txim siab qhov txwv kev qaug zog, txoj kev pab pawg siv los txiav txim siab qhov txwv kev qaug zog ntawm cov hlau sim, thiab tom qab kev tshuaj xyuas cov ntaub ntawv, qhov txwv kev qaug zog ntawm cov hlau sim yog li 760 MPa; txhawm rau txheeb xyuas lub neej qaug zog ntawm cov hlau sim nyob rau hauv ntau yam kev ntxhov siab, daim duab kos SN yog plotted, raws li pom hauv Daim Duab 3. Raws li tuaj yeem pom los ntawm Daim Duab 3, ntau qib kev ntxhov siab sib raug rau lub neej qaug zog sib txawv, thaum lub neej qaug zog ntawm 7, sib raug rau tus lej ntawm cov voj voog rau 107, uas txhais tau tias cov qauv nyob rau hauv cov xwm txheej no yog los ntawm lub xeev, tus nqi kev ntxhov siab sib raug tuaj yeem kwv yees li tus nqi zog qaug zog, uas yog, 760 MPa. Nws tuaj yeem pom tias daim duab kos S - N yog qhov tseem ceeb rau kev txiav txim siab ntawm lub neej qaug zog ntawm cov khoom muaj tus nqi siv tseem ceeb.
Daim Duab 3 SN nkhaus ntawm kev sim hlau tig khoov qaug zog
Lub neej qaug zog ntawm pawg thib ob ntawm cov qauv tau qhia hauv Rooj 3. Raws li tuaj yeem pom los ntawm Rooj 3, tom qab cov hlau sim raug decarburized ntawm qhov kub sib txawv, tus lej ntawm cov voj voog tau pom tseeb txo qis, thiab lawv ntau dua 107, thiab tag nrho cov qauv qaug zog tau tawg, thiab lub neej qaug zog tau txo qis heev. Ua ke nrog cov txheej txheem decarburized saum toj no nrog cov kab hloov pauv kub tuaj yeem pom, 750 ℃ decarburized txheej tuab yog qhov loj tshaj plaws, sib raug rau tus nqi qis tshaj plaws ntawm lub neej qaug zog. 850 ℃ decarburized txheej tuab yog qhov me tshaj plaws, sib raug rau tus nqi lub neej qaug zog yog qhov siab dua. Nws tuaj yeem pom tias tus cwj pwm decarburization txo qis qhov kev ua tau zoo ntawm cov khoom siv, thiab cov txheej decarburized tuab dua, lub neej qaug zog qis dua.
Rooj 3 Lub neej qaug zog ntawm qhov kub sib txawv ntawm decarburization (560 MPa)
Daim duab 4(a) qhia txog qhov tawg ntawm cov qauv, raws li pom hauv daim duab 4. Daim duab 4(a) rau thaj chaw tawg, daim duab tuaj yeem pom qhov tawg ntawm qhov tawg, raws li qhov tawg ntawm qhov tawg kom pom qhov tawg ntawm qhov tawg, tuaj yeem pom qhov tawg ntawm qhov tawg rau "ntses-qhov muag" uas tsis yog hlau, cov khoom siv yooj yim ua rau muaj kev ntxhov siab, ua rau muaj qhov tawg ntawm qhov tawg; Daim duab 4(b) rau thaj chaw tawg, pom cov kab tawg ntawm qhov tawg, zoo li tus dej, yog ib feem ntawm qhov tawg quasi-dissociative, nrog rau qhov tawg nthuav dav, thaum kawg ua rau tawg. Daim duab 4(b) qhia txog qhov tawg ntawm thaj chaw tawg nthuav dav, pom cov kab tawg ntawm qhov tawg, zoo li tus dej, uas yog ib feem ntawm qhov tawg quasi-dissociative, thiab nrog rau qhov tawg txuas ntxiv mus, thaum kawg ua rau tawg.
Kev tshuaj xyuas qhov tawg ntawm qhov qaug zog
Daim Duab 4 SEM morphology ntawm qhov tawg ntawm qhov chaw ntawm cov hlau sim
Yuav kom paub seb muaj pes tsawg yam khoom uas muaj nyob hauv daim duab 4, kev tshuaj xyuas cov khoom sib xyaw ntawm lub zog tau ua tiav, thiab cov txiaj ntsig tau pom hauv daim duab 5. Nws tuaj yeem pom tias cov khoom uas tsis yog hlau feem ntau yog cov khoom Al2O3, qhia tias cov khoom uas muaj nyob hauv yog qhov tseem ceeb ntawm cov kab nrib pleb uas tshwm sim los ntawm cov khoom tawg.
Daim Duab 5 Lub Zog Spectroscopy ntawm Cov Khoom Uas Tsis Yog Hlau
Xaus lus
(1) Tso qhov kub thiab txias rau ntawm 850 ℃ yuav txo qhov tuab ntawm cov txheej decarburized kom txo qhov cuam tshuam rau kev ua haujlwm qaug zog.
(2) Qhov kev txwv qaug zog ntawm kev sim hlau tig khoov yog 760 MPa.
(3) Kev sim hlau tawg hauv cov khoom tsis yog hlau, feem ntau yog Al2O3 sib tov.
(4) decarburization ua rau lub neej qaug zog ntawm cov hlau sim txo qis, cov txheej decarburization tuab dua, lub neej qaug zog qis dua.
Lub sijhawm tshaj tawm: Lub Rau Hli-21-2024
