Kev kuaj Hardness ntawm H13 cov khoom tom qab tus qauv tempering yuav tsum tau siv lub portable hardness tester los ntsuas ntawm ntau lub ntsiab lus ntawm lub workpiece, xyuas kom meej tus nqi nruab nrab ntawm 48-52 HRC thiab ib tug ib-thooj ntau yam tsawg dua los yog sib npaug rau 2 HRC. Qhov no, ua ke nrog kev kho saum npoo thiab ntsuas ntsuas, ua kom cov ntaub ntawv raug thiab txhim khu kev qha.
1. Txuj Ci Ntawm -Site Inspection Procedure
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Cov kauj ruam |
Cov Ntsiab Lus |
Kev piav qhia |
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① Kev Npaj Nto |
Xuab zeb cov ntsiab lus ntsuas kom txog thaum nws yog xim hlau, tshem tawm cov roj thiab oxide txheej. |
Xyuas kom zoo sojntsuam tiv tauj kom tsis txhob nyeem ntawv tsawg. |
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② Instrument Calibration |
Calibrate ntawm tus qauv thaiv ua ntej kuaj, tswj qhov yuam kev hauv ± 1 HRC. |
Tiv thaiv kev sib txawv ntawm qhov systematic thiab txhim kho repeatability. |
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③ Test Point Layout |
Xaiv 3-5 qhov chaw tseem ceeb rau txhua daim: nruab nrab, ntug, thiab tuab ciam teb. |
Npog cov cheeb tsam uas muaj cua txias tsis sib xws los txhim kho kev sawv cev. |
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④ Ntau qhov ntsuas |
Ntsuas txhua qhov taw tes 3 zaug thiab coj tus nqi nruab nrab. Qhov kev ncua deb ntawm cov indentations nyob ib sab yuav tsum siab dua los yog sib npaug li 3 hli. |
Txo qhov yuam kev random thiab txhim kho cov ntaub ntawv ruaj ntseg. |
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⑤ Kev Ntsuam Xyuas Cov Ntaub Ntawv |
Xam tus nqi ntawm tus kheej (tus nqi siab tshaj - tus nqi qis) thiab batch standard deviation. |
Txiav txim qhov sib xws thiab txheeb xyuas cov khoom ua haujlwm txawv txav. |
Daim Ntawv Pov Thawj: Ib tus neeg daim ntau yam tsawg dua lossis sib npaug rau 2 HRC, batch nruab nrab ruaj khov ntawm 48-52 HRC.
2. Kev soj ntsuam ceev faj
Txias mus rau chav tsev kub: qhov kub ntawm workpiece yuav tsum yog<50℃ before testing to prevent hot softening from affecting the readings;
Tsis txhob cuam tshuam ntug: Qhov kev ncua deb ntawm ntug yuav tsum siab dua lossis sib npaug li 3 hli los tiv thaiv kev cuam tshuam ntawm deformation diffusion;
Cov ntaub ntawv taug qab tau: Sau txhua daim ntawv nrog nws tus lej cim, tus neeg soj ntsuam, lub sijhawm, thiab tus lej ntawm lub tshuab hluav taws xob kom ua tiav qhov kaw - voj voog tswj kev ua haujlwm zoo;
Kev saib xyuas cov cuab yeej tsis tu ncua: Portable hardness testers yuav tsum tau kuaj xyuas peb lub hlis twg los xyuas kom meej qhov ntsuas.
Piv txwv li: Lub hardness ntawm tsib ntsuas ntawm H13 manifold phaj yog 50.1, 50.3, 49.8, 50.0, thiab 50.2 HRC, nrog ib tug ntau ntawm tsuas yog 0.5 HRC, uas yog xam tau tias yog zoo ib yam.
3. Cov txheej txheem pov thawj pab txhawb
Metallographic Sampling Analysis: Cov qauv ntawm cov khoom uas txawv txav yog npaj rau kev soj ntsuam kom paub meej tias cov microstructure yog ib yam tempered martensite + dispersed carbides;
Lub qhov cub kub qhov ntsuas qhov ntsuas qhov ntsuas: xyuas seb qhov ntsuas kub puas ruaj khov ntawm 550 ~ 600 degree, thiab seb puas muaj kev cuam tshuam lossis qhov sib txawv hauv cheeb tsam;
Kev sib piv kev sib xyaw: XRF yog siv los xyuas kom meej tias Cr, Mo, thiab V cov ntsiab lus ua tau raws li cov qauv, tshem tawm qhov cuam tshuam ntawm cov khoom hloov pauv.
Txoj Cai Kev Nyab Xeeb: "Cov ntaub ntawv hais lus rau nws tus kheej, ntau- kev txheeb xyuas qhov ntev" ua kom ntseeg tau tias qhov kev xeem tau cuam tshuam txog cov khoom siv hauv lub xeev.
