Yuav ua li cas yog nto tawv tawv?

Qhov saum npoo quenching thiab tempering kub kho feem ntau yog ua los ntawm induction cua sov los yog nplaim hluav taws kub. Lub ntsiab technical parameters yog deg hardness, lub zos hardness thiab zoo hardened txheej tob. Kev ntsuas hardness tuaj yeem siv Vickers hardness tester, Rockwell lossis nto Rockwell hardness tester kuj siv tau. Qhov kev xaiv ntawm kev xeem quab yuam (scale) muaj feem xyuam rau cov txheej txheem hardened qhov tob thiab qhov hardness ntawm lub workpiece. Muaj peb hom hardness testers koom nrog ntawm no.

1. Vickers hardness tester yog ib txoj hauv kev tseem ceeb los ntsuas qhov tawv tawv ntawm cov khoom siv cua sov. Nws tuaj yeem xaiv qhov kev sim quab yuam ntawm 0.5-100kg los kuaj cov txheej txheej tawv tawv li nyias li 0.05mm. Nws qhov tseeb yog qhov siab tshaj plaws thiab tuaj yeem paub qhov txawv ntawm qhov chaw ua haujlwm kub-kho. Me sib txawv ntawm hardness. Tsis tas li ntawd, cov txheej txheem hardened zoo yuav tsum tau kuaj xyuas los ntawm Vickers hardness tester. Yog li ntawd, nws yog ib qho tsim nyog yuav tsum tau nruab Vickers hardness tester rau cov chav tsev uas ua cov kev kho cua sov saum npoo los yog siv ntau qhov chaw kho cua sov ua haujlwm.

2. Qhov saum npoo Rockwell hardness tester kuj yog qhov tsim nyog rau kev sim qhov hardness ntawm nto quenched workpieces. Qhov saum npoo Rockwell hardness tester muaj peb teev los xaiv. Nws tuaj yeem kuaj ntau qhov chaw ua haujlwm tawv tawv uas nws qhov tob tob tshaj 0.1 hli. Txawm hais tias qhov tseeb ntawm qhov chaw Rockwell hardness tester tsis yog siab npaum li Vickers hardness tester, nws muaj peev xwm ua tau raws li qhov yuav tsum tau ua raws li kev tswj xyuas zoo thiab kev soj ntsuam tsim nyog rau cov nroj tsuag kho cua sov. Tsis tas li ntawd, nws kuj muaj cov yam ntxwv ntawm kev ua haujlwm yooj yim, kev siv yooj yim, tus nqi qis, kev ntsuas nrawm, thiab kev nyeem ncaj qha ntawm tus nqi hardness. Qhov saum npoo Rockwell hardness tester tuaj yeem ua tau sai thiab tsis muaj kev puas tsuaj rau cov khoom ua haujlwm ntawm cov khoom siv hluav taws xob. Qhov no yog qhov tseem ceeb heev rau cov hlau ua thiab cov tshuab tsim khoom.

3. Thaum tshav kub kub kho txheej txheej yog tuab, Rockwell hardness tester kuj siv tau. Thaum lub thickness ntawm lub tshav kub-kho hardened txheej yog nruab nrab ntawm 0.4 thiab 0.8 hli, HRA scale yuav siv tau, thiab thaum lub thickness ntawm hardened txheej tshaj 0.8 hli, HRC scale yuav siv tau.

Peb qhov hardness qhov tseem ceeb ntawm Vickers, Rockwell thiab Surface Rockwell tau yooj yim hloov dua siab tshiab rau hauv ib leeg thiab hloov mus rau qhov hardness qhov tseem ceeb ntawm cov qauv, kos duab lossis cov neeg siv. Cov lus hloov pauv tau raug muab rau hauv cov txheej txheem thoob ntiaj teb ISO, Asmeskas tus qauv ASTM thiab Suav tus qauv GB / T.