Muaj ntau hom ntaub ntawv hlau, suav nrog cov ntaub ntawv fitter, cov ntaub ntawv saw, cov ntaub ntawv shaping, cov ntaub ntawv tshwj xeeb, cov ntaub ntawv watchmaker, cov ntaub ntawv watchmaker tshwj xeeb, thiab cov ntaub ntawv ntoo. Lawv cov txheej txheem kuaj qhov nyuaj feem ntau ua raws li tus qauv thoob ntiaj teb ISO 234-2: 1982 Cov Ntaub Ntawv Hlau thiab Rasps - Ntu 2: Cov yam ntxwv ntawm Kev Txiav.
Tus txheej txheem thoob ntiaj teb teev ob txoj kev sim: txoj kev Rockwell hardness thiab txoj kev Vickers hardness.
1. Rau txoj kev ntsuas Rockwell hardness, feem ntau siv Rockwell C scale (HRC), thiab qhov yuav tsum tau ua kom tawv feem ntau siab dua 62HRC. Thaum qhov tawv siab dua, Rockwell A scale (HRA) kuj tseem siv tau rau kev sim, thiab tus nqi tawv tau los ntawm kev hloov pauv. Qhov tawv ntawm tus kov ntaub ntawv (thaj chaw suav txog peb feem tsib ntawm tag nrho qhov ntev pib ntawm qhov kov) yuav tsum tsis pub siab dua 38HRC, thiab qhov tawv ntawm cov ntaub ntawv ntoo yuav tsum tsis pub qis dua 20HRC.
2. Lub Vickers hardness tester kuj tseem siv tau rau kev sim, thiab tus nqi hardness sib xws yuav tsum tau txais los ntawm kev hloov pauv tom qab kev sim. Vickers hardness yog qhov tsim nyog rau kev sim cov ntaub ntawv hlau nrog cov khaubncaws sab nraud povtseg lossis tom qab kev kho saum npoo. Rau cov ntaub ntawv hlau kho nrog kev kho cua sov saum npoo lossis kev kho cua sov tshuaj, lawv qhov hardness yuav tsum tau sim ntawm daim ntawv du 5 hli txog 10 hli ntawm qhov txiav ntaub ntawv kawg.
Qhov nyuaj ntawm lub hau hniav yuav tsum nyob nruab nrab ntawm 55 HRC thiab 58 HRC, uas yog qhov tsim nyog rau kev sim los ntawm Vickers hardness method. Yog tias muaj qhov chaw tsim nyog, cov khoom ua haujlwm tuaj yeem muab tso ncaj qha rau ntawm lub rooj ua haujlwm ntawm Vickers hardness tester rau kev sim. Txawm li cas los xij, feem ntau cov khoom ua haujlwm tsis tuaj yeem ntsuas ncaj qha; nyob rau hauv cov xwm txheej zoo li no, peb yuav tsum npaj cov qauv ntawm cov khoom ua haujlwm ua ntej. Cov txheej txheem npaj cov qauv suav nrog lub tshuab txiav metallographic, lub tshuab sib tsoo metallographic & polishing, thiab lub tshuab nias metallographic. Tom qab ntawd, muab cov qauv npaj rau ntawm Vickers hardness tester workbench rau kev sim.
Yuav tsum nco ntsoov tias qhov kev sim qhov nyuaj ntawm cov ntaub ntawv tuav tsuas yog tuaj yeem ua tiav thaum qhov chaw tau ua tiav kom ua tau raws li cov xwm txheej xeem; tsuas yog cov kev cai ntawm tus qauv no, qhov kev sim qhov nyuaj ntawm cov ntaub ntawv hlau kuj yuav tsum ua raws li cov kev cai ntawm ISO 6508 thiab ISO 6507-1.
Lub sijhawm tshaj tawm: Cuaj hlis-24-2025
