Mining log rimsua haujlwm nyob rau hauv kev ua hauj lwm hnyav heev: hnyav static load, tsis tu ncua cuam tshuam los ntawm qhov tsis sib xws ntawm kuv txoj kev chaw, abrasive txhuam nrog pob zeb tawg thiab nquag cyclic kev nyuaj siab. Yog tias tsis muaj kev kho cua sov kom zoo, forged steel rims yog ib qho yooj yim rau kev txom nyem ntog, qaug zog tawg, deformation mus tas li thiab tawg sai sai, uas ua rau raug nqi qis thiab muaj kev nyab xeeb rau cov khoom siv mining.
Technical Data Table-Heat Treatment Parameters & Performance Outcomes
|
Thaum tshav kub kub-Kev kho mob |
Txheej Txheem Kub Ntau Yam |
Tuav Sijhawm |
Core Function ntawm Mining Wheel Rim |
Durability Txhim Kho Cov nyhuv |
Tej yam tshwm sim tsis txaus ntshai yog tsis muaj kev kho mob no |
|
normalizing |
860-920 degree |
1.5-3 h |
Ua kom zoo nplej qauv, homogenize nrog cov hlau muaj pes tsawg leeg, tshem tawm cov kev ntxhov siab casting / forging |
Txhim kho tag nrho cov ntaub ntawv toughness, txo tus nqi sab hauv; nteg ruaj khov lub hauv paus rau tom ntej hardening |
Uneven hardness, residual forging kev nyuaj siab, ntxov ntxov tawg pib nyob rau hauv hnyav cuam tshuam |
|
Quenching |
840-900 degree, dej / roj quenching |
1-2.5 h |
Cov cua txias nrawm los tsim cov qauv martensite, nce saum npoo thiab core hardness |
Txhawb nqa-kuj thiab thauj khoom- muaj peev xwm tiv thaiv kuv cov pob zeb sib txhuam |
Fast nto abrasion, rim deformation nyob rau hauv hnyav - lub luag hauj lwm mining load |
|
Tempering (Medium -High) |
480-620 degree |
2-4 h |
Tso tawm quenching brittleness, sib npaug hardness thiab cuam tshuam toughness |
Tiv thaiv brittle fracture nyob rau hauv nquag shock load nyob rau hauv hnyav underground mines |
Quench-induced internal cracking, sudden rim breakage nyob rau hauv kev cuam tshuam |
|
Surface Hardening (Induction Hardening) |
880-950℃(qhov cua sov hauv zos) |
0.2-0.8 h (hauv zos) |
Harden tsuas yog kev sib cuag - hnav nto; khaws sab hauv ntug matrix tawv |
Kev hnav siab- tiv taus sab nrauv thaum khaws kev poob siab- nqus lub cev sab hauv |
Fast groove hnav, sealing - nto puas, shortened kev pab cuam voj voog |
Kev kho cua sov yog qhov zoo tshaj plaws metallurgical txoj kev los kho lub microstructure sab hauv ntawm lub log-rim hlau, tsis yog tsuas yog hloov qhov loj me. Txhua kauj ruam cua sov thiab cua txias lub hom phiaj tshwj xeeb cov ntsiab lus tsis muaj zog ntawm mining rims.
Normalizing tshem tawm tsis sib xws grain tshwm sim los ntawm kub forging. Tom qab forging, hlau nplej loj hlob irregularly. Los ntawm cua sov mus rau qhov kub thiab txias txias, cov nplej tig zoo thiab zoo ib yam, yog li kev ntxhov siab yuav tsis mloog zoo rau ib feem tsis muaj zog ib cheeb tsam thaum lub ntug bears loj loj mining hnyav.
quenching dramatically nce hardness. Cov txheej txheem ceev-txias xauv cov qauv siv lead ua nyuaj hauv cov hlau, ua rau cov npoo kom tiv taus ntau dua los ntawm kev khawb khawb los ntawm cov pob zeb thiab cov pob zeb ntse.
High-temperature tempering tom qab quenching yog qhov tseem ceeb. Quenched steel ua nyuaj tab sis nkig. Tempering tso tawm sab hauv quenching kev nyuaj siab thiab ua lag luam ib nrab hardness rau zoo heev cuam tshuam toughness. Cov cuab yeej no ua rau lub npoo ntawm snapping thaum ntaus cov qhov hauv av hauv av lossis qhib qhov mines.
Hauv zos induction nto hardening muaj cov kev daws teeb meem. Tsuas yog qhov chaw sib tiv toj siab tau ua kom tawv, thaum lub ntsiab ntug lub cev tseem tawv. Qhov kev tsim no zam qhov tsis xws luag: tag nrho lub cev dhau-tawv tawv rims tawg yooj yim nyob rau hauv hnyav poob siab.
Nrog rau kev ua tiav kev kho cua sov, ua tiavmining log rimstau txais kev pab lub neej ntev dua, txo qis qhov tsis txaus siab tsis txaus ntseeg thiab hloov tau zoo dua rau kev thauj mus los ntev-ntev hnyav-load mining.