Dab tsi yog cov khoom siv thiab kev kho cua sov uas yuav tsum tau ua rau Single Stand Multi-groove Txo Rolling Mill

       Cov rolls ntawmIb leeg Stand Multi-groove Txo Rolling Millyog raug rau alternating dov loads thiab uneven hnav nyob rau hauv ntau passes. Kab lus no suav nrog cov ntaub ntawv uas feem ntau siv yob, ntsuas kev ua tau zoo, kev kho cua sov tshwj xeeb, thiab cov kev xav txog kev kho cua sov tseem ceeb rau ntau qhov rolls.

       Single-stand multi-pass sizing txo zeb ua cov khoom siv tseem ceeb rau lub raj tsim. Thaum lub sijhawm ua haujlwm, nws cov rolls raug txuas ntxiv mus rau lub siab dov, hloov pauv kev cuam tshuam, kev sib txhuam ntawm qhov kub thiab txias, thiab cyclic thermal stress. Piv nrog cov pa ib leeg-dhau yob, lub yob lub cev ntawm multi-pass rolls muaj ntau qhov grooved passes. Tsis sib xws load faib ntawm cov hla tau yooj yim ua rau hauv zos hnav, spalling, cracking thiab chipping. Yog li ntawd, yob xaiv cov khoom siv thiab cov txheej txheem kev kho cua sov ncaj qha txiav txim siab yob txoj kev pab cuam lub neej, raj qhov tseeb qhov tseeb thiab ruaj khov cov kab ntau lawm.

1. Kev khiav hauj lwm tej yam kev mob cuam tshuam rau cov khoom xaiv rau Multi-Pass Rolls ntawm ib leeg-Sizing Sizing txo zeb

       1. Ntau qhov grooved hla yog machined ntawm ib lub thoob. Kev ntxhov siab yog qhov tseem ceeb ntawm cov cheeb tsam hauv cheeb tsam vim qhov tsis sib xws ntawm kev thauj khoom ntawm txhua qhov hla.

       2. Kev sib txhuam tsis tu ncua tshwm sim thaum dov. Kev hnav khaub ncaws sib txawv heev ntawm kev hla hauv qab thiab hla lub xub pwg nyom, ua rau tsis ua tiav ntxov ntawm tus neeg hla dhau.

       3. Hloov cov kub thiab txias txias ua rau thermal qaug zog nyob rau hauv kub txo tej yam kev mob, uas nyhav tsim network tawg ntawm yob nto.

       4. Kev cuam tshuam ib ntus yuav tsum tau yob matrix kom muaj zog dua thiab spilling tsis kam tshaj cov yob zoo tib yam.

       Muab cov kev ua haujlwm saum toj no, ntau dhau los txo cov yob tsis tuaj yeem tso siab rau qhov siab tawv. Kev sib xyaw ua ke ntawm qhov hnav tsis kam, lub zog matrix, thermal qaug zog tsis kam thiab cuam tshuam toughness yog yuav tsum tau.

2. Kev xaiv cov khoom siv rau yob

2.1 High-Chromium Cam khwb cia hlau Rolls (Kev xaiv thawj zaug rau kub txo)

       High-chromium cam khwb cia hlau yog cov khoom siv dav tshaj plaws rau cov yob ntawm ib leeg-sawv multi-pass kub raj sizing txo mills.

       Qhov zoo: High hardness carbides xa zoo heev hnav tsis kam thiab thermal coj kev ua tau zoo, haum rau high-temperature txo cov txheej txheem.

       Cov kev txwv: Tsawg toughness; spalling ntawm qhov chaw hla tuaj yeem tshwm sim nyob rau hauv kev cuam tshuam hnyav.

       Daim ntawv thov: Kub txo, nruab nrab dov load thiab loj nruam tube ntau lawm.

2.2 Alloy Ductile Hlau Rolls

       Cov txiaj ntsig zoo: Sib npaug cov khoom siv kho tshuab zoo, kev cuam tshuam zoo dua thiab thermal cracking tsis kam tshaj li high-chromium cam khwb cia hlau, zoo machinability.

       Kev txwv: me ntsis qis dua qhov hnav tsis kam piv nrog high-chromium cam khwb cia hlau.

       Daim Ntawv Thov: Rolling scenarios nrog hnyav cuam tshuam thiab nruj tiv thaiv kev txwv rau ntau qhov kev txo qis.

2.3 Forged Steel Rolls (Cold Txo / High Precision Applications)

       Cov qib: CrMo, CrNiMo series alloy forged steel.

       Qhov zoo: ntom matrix, siab toughness, muaj zog cuam tshuam kuj thiab zoo hardenability nrog txaus regrinding nyiaj.

       Kev txwv: Kev hnav tsis zoo rau cov qib cam khwb cia hlau thiab cov nqi tsim khoom ntau dua.

       Daim ntawv thov: Txias tube sizing txo, high-precision nyias-walled raj ntau lawm thiab hnyav ua hauj lwm tej yam kev mob nrog hnyav.

2.4 High-Speed ​​Steel Rolls (High-End Applications)

       High-speed steel rolls feature zoo heev hnav tsis kam thiab liab hardness nrog superior thermal qaug zog kuj. Txawm li cas los xij, lawv tuaj nrog cov nqi khoom siab thiab kev tswj hwm nruj rau cov txheej txheem kho cua sov. Lawv raug xa mus rau hauv high-speed, high-them raj txo cov kab ntau lawm.

       Txoj Cai Xaiv: Ntsuas qhov siab tshaj plaws dov load, dov kub thiab dhau qhov tob thaum xaiv cov yob ntau dhau. Toughness indexes yuav tsum tau hloov kho kom zoo ntawm lub xub pwg nyom qhov kev ntxhov siab kom tsis txhob tawg ntawm cov ces kaum.

3. Kev kho cua sov kev xav tau rau cov yob sib xws

       Lub hom phiaj ntawm kev kho cua sov yob yog kom ua tiav cov txheej txheem hnav-tiv taus ua haujlwm nrog siab hardness ua ke nrog cov tawv matrix. Cov txheej saum npoo guarantees hnav tsis kam ntawm grooved hla thaum lub matrix tiv thaiv yob tawg.

3.1 Cov txheej txheem kho cua sov rau High-Chromium Cast Iron Rolls

       Txoj kev: Casting → Stress Relief Annealing → Rough Machining → Quenching → Tempering

       Annealing: Tshem tawm cov kev ntxhov siab seem seem thiab txhim kho kev txiav machinability.

       quenching: Cua quenching los yog huab cua blasting quenching los tsa nto hardness.

       Tempering: Tsawg-kub tempering kom tshem tawm quenching kev ntxhov siab, stabilize microstructure thiab txo qhov kev pheej hmoo tawg.

       Hardness specification: Yob nto hardness HSD 80 ~ 92 thaum tuav siab toughness ntawm yob core.

3.2 Kev kho cua sov rau Alloy Ductile Iron Rolls

       Cov txheej txheem txheej txheem: Casting → Annealing → Rough Machining → Quenching + Tempering

       Kev tswj qhov tseem ceeb: Stabilize pearlite feem hauv matrix los txhim kho thermal qaug zog tiv thaiv.

       Hardness ntau yam: HSD 75 ~ 88. Piv nrog rau high-chromium cam khwb cia hlau, nws muab ntau dua toughness npoo kom haum rau alternating cuam tshuam loads ntawm multi-pass dov.

3.3 Kev kho cua sov rau Alloy Forged Steel Rolls

       Cov txheej txheem txheej txheem: Forging → Tom qab forging Annealing → Rough Machining → Quenching thiab Tempering → Nto Induction Hardening ntawm Yob → Tsawg-kub Tempering

       Quenching thiab tempering: Xyuas kom muaj zog thiab siab toughness ntawm yob matrix.

       Induction nto hardening: Tsuas yog nce hardness ntawm grooved ua hauj lwm nto thaum ua kom toughness ntawm cov tub ntxhais kom tsis txhob tag nrho embrittlement.

       Hardness: Ua hauj lwm nto HRC 48 ~ 58.

3.4 Kev kho cua sov rau kev kub ceev steel yob

       Txheej txheem: Kub-kub quenching + ntau tempering kom tag nrho precipitate alloy carbides.

       Yam ntxwv: Hardness decays maj mam ntawm qhov kub thiab txias (zoo liab hardness). Kev tswj nruj ntawm kev kho cua sov deformation yog yuav tsum tau. Dimensional raug tswj ntawm multi-pass grooves yog qhov nyuaj.

4. Kev txiav txim siab tshwj xeeb rau kev kho cua sov rau ib leeg-Stand Multi-Pass Rolls

1. Kev Tiv Thaiv Kev Nyuaj Siab rau Multi-Pass Geometry

       Hla lub xub pwg nyom thiab hla cov ces kaum yog qhov chaw muaj kev ntxhov siab. Thaum kho cua sov, cua sov thiab cua txias yuav tsum tau tswj kom tsis txhob quenching tawg ntawm cov ces kaum. Tag nrho tempering tom qab quenching thiaj li residual stress. Qhov no yog qhov sib txawv tseem ceeb tshaj plaws ntawm kev sib tw ntau dhau thiab ib zaug dhau rolls.

2. Hardness Uniformity Control

       Ntau qhov grooved passes yog machined ntawm ib yob. Hardness sib txawv ntawm qhov chaw ua hauj lwm thoob plaws tag nrho cov hla dhau tom qab kev kho cua sov yuav tsum tau khaws cia nyob rau hauv cov kev txwv. Non-uniform hardness ua rau inconsistent hnav ntawm sib txawv passes thiab fluctuation ntawm lub raj txheej txoj kab uas hla kam rau ua.

3. Kev kho cua sov Deformation tswj

       Multi-pass rolls feature ntev chim thiab ntau grooves. Thaum tshav kub kub kho deformation ncaj qha cuam tshuam rau concentricity ntawm passes. Kev kho kom zoo ntawm kev kho cua sov fixture thiab txias txoj kev yog yuav tsum tau. Kev deformation ntau dhau yuav ua rau muaj kev cuam tshuam tom qab ua haujlwm.

4. Kev tshuaj ntsuam xyuas kev ntxhov siab

       Kev ntxhov siab seem yuav tsum raug tshuaj xyuas tom qab kev kho cua sov. Kev ntxhov siab ntau dhau tuaj yeem ua rau qaug zog tawg pib los ntawm cov ces kaum dhau los nyob rau hauv superimposed alternating rolling loads thiab ua rau ua tsis tiav ntxov ntxov.

5. Kev sib raug zoo ntawm cov khoom siv yob, kev kho cua sov thiab kev ua tsis tiav

       Kev hnav khaub ncaws nrawm nrawm: Tsis txaus deg hardness lossis cov ntsiab lus carbide tsawg ntawm cov khoom yob.

       Cracks thiab crazing ntawm cov ces kaum: Ntau qhov seem seem tom qab kho cua sov, tsis txaus toughness thiab thermal qaug zog puas.

       Chiping thiab spalling ntawm qhov chaw hla: Brittle tawv txheej txheej nrog tsis txaus matrix toughness los yog tsis tsim nyog quenching txheej txheem.

       Qhov tseem ceeb hnav tsis sib xws ntawm kev hla: Tsis sib xws hardness tom qab kev kho cua sov ua ke nrog tsis tsim nyog dov load faib.

6. Cov lus xaus

       Cov khoom siv thiab kev kho cua sov rau cov yob ntawm ib leeg-sawv multi-pass sizing txo cov zeb tsis tuaj yeem raug coj ncaj qha los ntawm cov qauv rau ib zaug dhau rolls. Qhov kev ntxhov siab thiab kev thauj khoom tsis sib xws tau qhia los ntawm ntau qhov grooved geometry yuav tsum muaj qhov sib npaug ntawm kev hnav tsis kam thiab toughness hauv cov khoom xaiv. Kev kho cua sov yuav tsum tsom rau qhov kev ntxhov siab nyob ntawm thaj chaw grooved, hardness uniformity thiab kho cua sov deformation. Kev sib raug zoo ntawm cov khoom siv thiab cov txheej txheem kho cua sov txuas ntxiv rau lub voj voog kev pabcuam yob, stabilizes lub raj sab nraud, ovality thiab lwm yam kev ntsuas tiav, thiab txo qis qis thiab yob hloov cov nqi.