Cov kabmob dov yog cov khoom tseem ceeb uas siv dav hauv kev tsim kho tshuab, thiab lawv cov kev ua tau zoo cuam tshuam ncaj qha rau kev ua haujlwm ntawm tag nrho lub tshuab. Kev sim qhov nyuaj ntawm cov khoom siv dov yog ib qho ntawm cov cim qhia kom ntseeg tau tias muaj kev ua tau zoo thiab kev nyab xeeb. Cov Txheej Txheem Thoob Ntiaj Teb ISO 6508-1 "Cov Txheej Txheem Xeem rau Qhov Nyuaj ntawm Cov Khoom Siv Dov" qhia txog cov kev cai rau kev sim qhov nyuaj ntawm ib feem, suav nrog cov ntsiab lus hauv qab no:
1. Cov kev cai ntawm qhov nyuaj rau cov khoom siv tom qab tempering;
1) Cov hlau chromium uas muaj carbon ntau (GCr15 series):
Qhov nyuaj tom qab tempering feem ntau yuav tsum nyob rau hauv qhov ntau ntawm 60 ~ 65 HRC (Rockwell hardness C scale);
Qhov nyuaj tsawg kawg nkaus yuav tsum tsis txhob qis dua 60 HRC; txwv tsis pub, qhov kev tiv thaiv hnav yuav tsis txaus, ua rau hnav ntxov;
Qhov nyuaj tshaj plaws yuav tsum tsis pub tshaj 65 HRC kom tsis txhob muaj kev tawg ntau dhau ntawm cov khoom, uas yuav ua rau tawg thaum muaj kev cuam tshuam.
2) Cov ntaub ntawv rau cov xwm txheej ua haujlwm tshwj xeeb (xws li cov hlau bearing carburized, cov hlau bearing kub siab):
Cov hlau uas muaj carburized bearing (xws li 20CrNiMo): Qhov nyuaj ntawm cov txheej carburized tom qab tempering feem ntau yog 58 ~ 63 HRC, thiab qhov nyuaj ntawm cov tub ntxhais tseem ceeb yog qis dua (25 ~ 40 HRC), uas sib npaug qhov hnav tsis kam ntawm qhov chaw thiab cov tub ntxhais tseem ceeb;
Cov hlau uas muaj qhov kub thiab txias siab (xws li Cr4Mo4V): Tom qab tempering hauv qhov chaw kub thiab txias, qhov nyuaj feem ntau tseem nyob ntawm 58 ~ 63 HRC kom ua tau raws li qhov yuav tsum tau hnav tsis kam ntawm qhov kub thiab txias siab.
2. Qhov yuav tsum tau ua kom muaj zog rau cov khoom siv tom qab kub hnyiab;
200°C Raceway 60 – 63HRC Pob Hlau 62 – 66HRC Cov Menyuam 61 – 65 HRC
225°C Raceway 59 – 62HRC Pob Hlau 62 – 66HRC Cov Menyuam 61 – 65 HRC
250°C Raceway 58 – 62HRC Pob Hlau 58 – 62HRC Cov Menyuam 58 – 62 HRC
300°C Raceway 55 – 59HRC Pob Hlau 56 – 59HRC Cov Menyuam 55 – 59 HRC
3. Cov kev cai yooj yim rau cov qauv kuaj hauv kev sim qhov nyuaj, nrog rau ntau yam kev ntsuas xws li kev xaiv cov txheej txheem sim qhov nyuaj, lub zog sim, thiab qhov chaw sim.
1) Cov zog sim rau Rockwell hardness tester: 60kg, 100kg, 150kg (588.4N, 980.7N, 1471N)
Qhov kev sim zog ntawm Vickers hardness tester yog qhov dav heev: 10g ~ 100kg (0.098N ~ 980.7N)
Lub zog sim rau Leeb hardness tester: Hom D yog qhov siv dav tshaj plaws rau lub zog sim (lub zog cuam tshuam), tsim nyog rau feem ntau cov khoom siv hlau ib txwm muaj
2) Saib daim duab hauv qab no rau txoj kev sim
| Tus lej xov tooj | Cov lus qhia tshwj xeeb | Txoj kev sim | Cov Lus Cim |
| 1 | D< 200 | HRA, HRC | Qhov tseem ceeb yog muab rau HRC |
| bₑ≥1.5 | |||
| Dw≥4.7625 ~ 60 | |||
| 2 | bₑ<1.5 | HV | Yuav raug sim ncaj qha los yog tom qab mounting |
| Dw<4.7625 | |||
| 3 | D ≥ 200 | HLD | Txhua qhov chaw dov uas tsis tuaj yeem kuaj xyuas qhov nyuaj ntawm lub tshuab ntsuas qhov nyuaj ntawm lub rooj zaum tuaj yeem kuaj xyuas los ntawm txoj kev Leeb. |
| bₑ ≥ 10 | |||
| Dw≥ 60 | |||
| Lus Cim: Yog tias tus neeg siv muaj cov kev cai tshwj xeeb rau kev sim qhov nyuaj, lwm txoj hauv kev tuaj yeem xaiv los sim qhov nyuaj. | |||
| Tus lej xov tooj | Txoj kev sim | Qhov kev qhia tshwj xeeb / hli | Lub zog sim / N |
| 1 | HRC | bₑ ≥ 2.0, Dw≥ 4.7625 | 1471.0 |
| 2 | HRA | bₑ > 1.5 ~ 2.0 | 588.4 |
| 3 | HV | bₑ > 1.2 ~ 1.5, Dw≥ 2.0 ~ 4.7625 | 294.2 |
| 4 | HV | bₑ > 0.8 ~ 1.2, Dw≥ 1 ~ 2 | 98.07 |
| 5 | HV | bₑ > 0.6 ~ 0.8, Dw≥ 0.6 ~ 0.8 | 49.03 |
| 6 | HV | bₑ < 0.6, Dw< 0.6 | 9.8 |
| 7 | HLD | bₑ ≥ 10, Dw≥ 60 | 0.011 J (Joule) |
Txij li thaum nws siv rau xyoo 2007, cov txheej txheem sim uas tau teev tseg hauv tus qauv tau siv dav hauv kev tswj xyuas zoo ntawm cov txheej txheem tsim khoom hauv cov chaw tsim khoom.
Lub sijhawm tshaj tawm: Lub Yim Hli-20-2025
