Cov txheej txheem kho cua sov ntawm cov yas yas

Cov hlau sib txawv tau siv los ua cov yas yas, thiab lawv cov tshuaj lom neeg muaj pes tsawg leeg thiab cov khoom siv dag zog sib txawv, yog li cov txheej txheem kev tsim khoom sib txawv; zoo ib yam, ntau hom yas yas hlau siv txheej txheem kev kho cua sov sib txawv. Nqe lus no feem ntau qhia txog cov txheej txheem tsim khoom thiab cov yam ntxwv ntawm cov txheej txheem kho cua sov ntawm lub yas pwm.

1. Piav qhia txog kev kho cua sov

1. Annealing

(1) Tswv yim: Cov txheej txheem kho cua sov ntawm cua sov hlau mus rau qhov ntsuas kub tsim nyog, khaws nws rau qee lub sijhawm, thiab tom qab ntawd maj mam txias (feem ntau txias nrog lub cub tawg).

(2) Lub Hom Phiaj:

1. Ua kom tawv tawv ntawm cov hlau qis kom ua rau nws cov yas (los pab txiav);
2. Txhim kho cov nplej, thiab txawm tias cov qauv thiab cov sib xyaw ntawm cov hlau;
3. Tshem tawm cov kev nyuaj siab sab hauv sab hauv hlau thiab tiv thaiv deformation thiab tawg

(3) Kev faib tawm: tiav annealing; spheroidizing annealing; txhim kho kev ntxhov siab

2. Normalizing

(1) Tswv yim: Cov txheej txheem txheej txheem cua sov hlau rau 30 ～ 500C saum Ac3 lossis ACcm, tuav nws rau lub sijhawm tsim nyog, thiab txias nws hauv huab cua.

(2) Lub Hom Phiaj: Nws yog qhov zoo ib yam li lub hom phiaj ntawm kev pleev xim, tab sis qhov ua kom txias txias yog me ntsis nrawm dua li ua kom sov, yog li cov qauv pearlite tau txais tom qab ua haujlwm tau zoo, thiab lub zog thiab tawv yog siab dua li cov hlau annealed.

Kev ua kom muaj lub voj voog tsim khoom luv dua li ua kom sov thiab muaj tus nqi qis thiab ua haujlwm yooj yim. Yog li ntawd, normalizing yog qhov zoo dua thaum ua tau, tab sis kev pleev xim yuav tsum siv rau qhov nyuaj.

3. Tua tawm

(1) Tswv yim: Cov txheej txheem kho cua sov ntawm cua sov hlau mus rau qhov kub siab tshaj Ac3 lossis Ac1, tuav nws rau qee lub sijhawm, thiab tom qab ntawd txias ntawm qhov tsim nyog kom tau txais martensite lossis bainite qauv.

(2) Lub Hom Phiaj: Txhawm rau kom tau txais martensite, txhim kho lub zog thiab tawv ntawm cov hlau.

4. Tempering

(1) Tswv yim: txheej txheem kho cua sov uas cov hlau quenched tau muab rhaub kom kub hauv qab Ac1 taw tes, tuav rau qee lub sijhawm, thiab tom qab txias rau chav sov.

(2) Lub Hom Phiaj:

1. Tshem tawm kev ntxhov siab sab hauv;
2. Tau txais cov cuab yeej xav tau (txhim kho qhov tawv ntawm cov hlau, tsim nyog kho lub zog thiab tawv ntawm cov hlau);
3. Lub koom haum ruaj khov thiab loj

Thib ob, txheej txheem kev tsim khoom ntawm cov yas yas

1. Cov pa roj carbon tsawg thiab cov pa roj carbon tsawg hlau ua pwm

Piv txwv, txheej txheem txheej txheem ntawm 20, 20Cr, 20CrMnTi thiab lwm cov hlau yog: blanking → forging tuag blank → annealing → mechanical ntxhib machining → txias extrusion sib sau → recrystallization annealing → mechanical finish → carburizing → quenching, tempering → sib tsoo thiab polishing → Sib sau ua ke.

2. High-alloy carburized steel pwm

Piv txwv, txheej txheem txheej txheem ntawm 12CrNi3A thiab 12CrNi4A steel yog: blanking → forging tuag blank → normalizing thiab kub tempering → mechanical ntxhib machining → kub tempering → xov → carburizing → quenching thiab tempering → sib tsoo thiab polishing → los ua ke.

3. Quenched thiab tempered steel pwm

Piv txwv, txheej txheem txheej txheem ntawm 45, 40Cr thiab lwm yam hlau yog: blanking → forging tuag blank → annealing → mechanical ntxhib machining → tempering thiab tempering → mechanical finish → dressing, polishing → sib dhos.

4. Carbon tool steel thiab alloy tool steel pwm

Piv txwv, txheej txheem txheej txheem ntawm T7A -T10A, CrWMn, 9SiCr thiab lwm cov hlau yog: blanking → forging rau blanks tuag → spheroidizing annealing → mechanical ntxhib machining → kev nyuab siab nyem annealing → mechanical semi-finishing → mechanical finishing → quenching, tempering → sib tsoo Polishing → los ua ke.

5. Pre-hardened steel pwm

Piv txwv, 5NiSiCa, 3Cr2Mo (P20) thiab lwm yam hlau. Rau cov neeg ua tiav ncaj qha nrog cov khoom lag luam bar, lawv tau ua ntej tawv vim qhov xwm txheej khoom, thiab tuaj yeem ua tiav ncaj qha thiab tsim, tom qab ntawd txhuam thiab sib sau ua ke. Rau cov uas yuav tsum tau forged rau hauv qhov seem thiab tom qab ntawv ua tiav, txheej txheem txheej txheem yog: blanking → forging → spheroidizing annealing → npaj los yog milling rau sab → kho ua ntej tawv (34～ 42 HRC tau)→ mechanical roughing → tshem tawm kev ntxhov siab → Mechanical xov → polishing → los ua ke.

Peb, cov yam ntxwv kho cua sov ntawm cov yas yas

(1) Kev kho cua sov yam ntxwv ntawm carburized steel yas pwm

1. Rau cov yas yas uas muaj lub siab tawv, siab hnav tsis kam thiab siab toughness yuav tsum tau, carburized hlau yuav tsum tau siv rau kev tsim khoom, thiab carburizing, quenching thiab kub tsis txias yog qhov kev kho cua sov zaum kawg.

2. Cov yuav tsum tau ua rau txheej carburized, feem ntau cov tuab ntawm txheej carburized yog 0.8 ~ 1.5 hli, thaum nias cov yas uas muaj cov txhaws tawv, cov pwm carburized txheej tuab yuav tsum tau ua 1.3 ~ 1.5 hli, thaum nias cov yas mos, txheej carburized Lub thickness yog 0.8 ～ 1.2mm. Cov ntsiab lus carbon ntawm txheej txheej carburized yog qhov zoo dua 0.7% rau 1.0%. Yog tias siv cov pa roj carbon thiab nitrogen co-infiltration, hnav tsis kam, corrosion kuj, oxidation kuj thiab anti-sticking zog yuav zoo dua.
3. Qhov kub hnyiab feem ntau yog 900 ～ 920 ℃, thiab cov pwm me me nrog cov kab noj hniav nyuaj tuaj yeem siv 840 ～ 860 ℃ nruab nrab kub carbonitriding. Lub sij hawm khaws cia cov cua sov yog 5-10 h, uas yuav tsum tau xaiv raws li qhov yuav tsum tau ua kom tuab ntawm txheej txheej carburized. Cov txheej txheem carburizing tau txais cov txheej txheem txheej txheej txheej txheej txheej txheej txheej txheej, yog, qhov kub thiab txias theem (900～ 920 Nws) feem ntau yog kom nrawm nkag mus rau saum npoo ntawm ntu; theem kub nruab nrab (820～ 840 Nws) feem ntau yog txhawm rau ua kom tuab ntawm txheej txheej carburized. Ib qho kev tsim nyog thiab tsim nyog cov pa roj carbon ntau gradient faib tau tsim nyob hauv txheej txheej carburized, uas yog yooj yim rau quenching ncaj qha.

4. Cov txheej txheem quenching tom qab carburizing yog txawv raws li hom hlau. Tom qab carburizing, nws tuaj yeem siv sib cais: reheating thiab quenching; quenching ncaj qha tom qab qib carburizing (xws li cov hlau carburized hlau); quenching ncaj qha tom qab kub nruab nrab carbonitriding (xws li kev lag luam Me me ua pwm tsim los ntawm kev txias txias ntawm cov hlau ntshiab lossis cov hlau qis); cua quenching tom qab carburizing (xws li cov pwm loj thiab nruab nrab uas ua los ntawm cov hlau tsis muaj hlau zoo carburized).

(2) Kev kho cua sov ntawm cov tawv yas yas pwm

1. Rau cov pwm nrog cov duab nyuaj dua, kev kho cua sov yuav tsum tau ua tom qab kev ua haujlwm ntxhib thiab tom qab ntawd ua tiav cov txheej txheem kom ntseeg tau qhov kev hloov pauv me tshaj thaum kho cua sov. Rau precision pwm, qhov deformation yuav tsum tsawg dua 0.05%.2. Qhov yuav tsum tau ua ntawm kab yas pwm kab noj hniav yog nruj heev, yog li thaum lub sij hawm quenching thiab cua sov txheej txheem, nws yog qhov tsim nyog los xyuas kom meej tias cov nplaim kab noj hniav tsis tau oxidized, decarburized, tsis corroded, ua kom sov, lwm yam. Nws yuav tsum tau ua kom sov hauv qhov chaw tiv thaiv cua sov lossis hauv lub tshuab ua kom sov ntsev tom qab deoxidation nruj. Yog tias muaj ib lub thawv-hom ua rau cua sov siv los ua cua sov, ib tus neeg tiv thaiv yuav tsum tau siv rau saum npoo ntawm kab noj hniav, thiab qhov cua sov yuav tsum tau tswj. Cua txias nruab nrab, tswj tus nqi txias kom tsis txhob deformation, tawg thiab scrapping thaum txheej txheem quenching. Feem ntau, kub da dej quenching zoo dua, thiab ua ntej txias txias tuaj yeem siv tau.

3. Tom qab quenching, nws yuav tsum tau txias nyob rau lub sijhawm, qhov kub thiab txias yuav tsum siab dua qhov ua haujlwm kub ntawm pwm, thiab lub sijhawm kub hnyiab yuav tsum txaus. Qhov ntev nyob ntawm cov khoom siv pwm thiab ntu loj, tab sis tsawg kawg 40-60 feeb.

(3) Kev kho cua sov ntawm pre-hardened steel yas pwm

1. Cov hlau ua ntej tawv tau muab rau hauv lub xeev ua ntej tawv, thiab feem ntau tsis xav tau kev kho cua sov, tab sis qee zaum nws yuav tsum tau hloov kho forging, thiab tuag dawb tom qab hloov kho forging yuav tsum tau kho cua sov.

2. Kev kho cua sov ua ntej ntawm cov hlau ua kom tawv tawv feem ntau yog siv cov tshuaj txhuam hniav, lub hom phiaj yog tshem tawm forging kev nyuaj siab, tau txais cov qauv kheej kheej pearlite qauv, txo hardness, nce plasticity, thiab txhim kho kev txiav ua haujlwm lossis txias txias ua kom muaj kev ua haujlwm ntawm qhov tuag tuag.

Cov txheej txheem ua kom tawv ntawm cov hlau ua ntej tawv yog yooj yim, feem ntau ntawm cov uas txais yuav quenching thiab tempering kho, thiab tempered sorbite qauv tau txais tom qab quenching thiab tempering. Qhov kub thiab txias muaj qhov kub ntau uas tuaj yeem ua tau raws li ntau yam kev ua haujlwm nyuaj ntawm cov pwm. Vim yog qhov ua tau zoo ntawm cov hlau no, roj txias, cua txias los yog nitrate-ntsev qib quenching tuaj yeem siv thaum lub sij hawm quenching.

(4) Kev kho cua sov ntawm hnub nyoog-tawv steel yas pwm

1. Cov txheej txheem kho cua sov ntawm hnub nyoog hardening steel tau muab faib ua ob theem pib. Thawj, kev kho tshuaj yog nqa tawm, yog, cov hlau yog rhaub kom kub, yog li ntau yam kev sib xyaw ua ke tau yaj hauv austenite, thiab austenite tau tua kom tau txais cov qauv martensite. Cov kauj ruam thib ob yog kev kho neeg laus, thiab kev laus yog siv los ntxiv dag zog rau cov khoom siv dag zog uas ua tau raws qhov xav tau kawg.

2. Kev kho cov cua sov feem ntau yog nqa tawm hauv lub tshuab ua kom sov ntsev lossis lub thawv rauv. Lub sijhawm cua sov tuaj yeem yog feem: 1min/hli, 2~ 2.5min/hli, quenching txais roj txias, thiab cov hlau nrog cov tawv tawv tawv kuj tuaj yeem ua cua txias. Yog tias qhov ntsuas kub zaum kawg tuaj yeem tswj tau qhov tseeb thaum tsim cov tuag tuag, kev daws teeb meem tuaj yeem ua ncaj qha tom qab forging.

3. Kev kho laus yog ua tau zoo tshaj plaws hauv lub tshuab nqus tsev. Yog hais tias nws yog nqa tawm nyob rau hauv ib lub thawv rauv, txhawm rau tiv thaiv qhov chaw ntawm kab noj hniav pwm los ntawm oxidized, qhov chaw tiv thaiv yuav tsum tau nkag rau hauv lub cub tawg, los yog txhuas oxide hmoov, graphite hmoov, los yog muab cov hlau pov tseg pov tseg yuav tsum tau siv hauv lub thawv. Kev laus nyob hauv kev tiv thaiv. Kev tiv thaiv cov cua sov yuav tsum tsim nyog ncua lub sijhawm khaws cia cua sov, txwv tsis pub nws yuav nyuaj rau ua tiav cov txiaj ntsig kev laus.

Yog tias koj muaj lus nug txog kev lag luam yas,plz xav tias dawb nug FLYSE pab pawg,peb yuav muab kev pabcuam zoo tshaj rau koj！ Peb tseem tuaj yeem muab khoom rau koj zoo tab sis pheej yig txhaj tshuaj molding tshuab! Los yog hu rau peb ntawm Facebook.

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