Tus lej rau cov qauv siv tawv hlau yog H. Raws li kev sib tw sib txawv, Rockwell (HB), Rockwell (HB) Hardness, thiab lwm yam thiab lwm yam thiab lwm yam. HB muaj ntau qhov kev siv dav dav ntawm cov ntawv thov, thiab HRC yog qhov tsim nyog rau cov ntaub ntawv nrog lub siab tawv, xws li kev kho cua sov. Qhov sib txawv yog tias indenter ntawm cov neeg sim tawv yog qhov sib txawv. Lub Brinell Hardness Tester yog pob Indenter, thaum lub Rockwell Hardness Tester yog pob zeb diamond indenter.
HV haum rau lub tshuab tsom tsom. Vickers Hardness (HV) nias cov khoom saum npoo nrog tsawg dua 120kg thiab pob zeb diamond square indenter nrog lub kaum sab xis ntawm 136 °. Thaj tsam thaj tsam ntawm cov khoom indentation lub qhov yog muab faib los ntawm cov nqi thauj khoom, uas yog Vickers Hardness nqi (HV). Vickers Hardness yog qhia ua HV (xa mus rau GB / T4340-1999), thiab nws ntsuas ntsuas cov qauv tsawg.
HL LANDABLE TAARNESS TESTER yog yooj yim rau kev ntsuas. Nws siv qhov cuam tshuam pob taub hau kom cuam tshuam rau lub hardness nto thiab tsim thaws. Lub hardness yog xam los ntawm kev sib piv ntawm rebound ceev ntawm punch ntawm 1mm los ntawm cov piv txwv saum toj. Cov qauv yog: Leeb Hardness HLR = 1000 × VB (rov qab ceev) / VA (cuam tshuam ceev).
Portable LeeB Hardness Tester tuaj yeem hloov mus rau hauv Brinell (HB), Rockwell (HV), tshuaj loog (hs) hardness tom qab kev ntsuas tus ntsuas. Los yog siv Leeb lub ntsiab cai los hais ncaj qha ntsuas tus nqi hardness nrog Brinell (HB), Rockwell (HV), LEB (HL), ntug dej (HS).
HB - Brinell Hardness:
Brinell Hardness (HB) feem ntau siv thaum cov khoom yog softer, xws li cov uas tsis muaj hlau, hlau ua ntej kev kho cua sov lossis tom qab kev pab cuam kub. Lub Hardness Hluav Taws Xob (HRC) feem ntau siv rau cov ntaub ntawv nrog kev nyuaj siab dua, xws li hardness tom qab kev kho cua sov, thiab lwm yam.
Brinell Hardness (HB) yog kev sim thauj khoom ntawm qee qhov loj me. Ib lub pob tawv tawv steel lossis carbide pob ntawm ib txoj kab ib txog yog nias rau hauv cov hlau mus kuaj. Qhov kev xeem thauj yog khaws cia rau ib lub sijhawm teev tseg, thiab tom qab ntawd lub nra raug tshem tawm kom ntsuas cov cheeb ntawm qhov indentation nyob rau saum npoo yuav tsum tau kuaj. Lub Brinell hardness tus nqi yog qhov quotient tau los ntawm kev faib cov thauj khoom los ntawm thaj chaw kheej ntawm qhov indentation. Feem ntau, ib lub pob tawv tawv tawv ntawm qee qhov loj me (feem ntau 10mm hauv cov khoom sib txawv) tau nias rau hauv cov khoom saum npoo av (feem ntau yog 3000kg) thiab tswj hwm rau ib lub sijhawm. Tom qab lub nra tau muab tshem tawm, qhov sib piv ntawm lub nra rau qhov chaw indentation yog lub brinell hardness tus nqi (HB), thiab chav tsev yog Kilogram yuam / MM2 (N / MM2).
Lub hardand hardness txiav txim siab lub hardness muaj nuj nqis ntsuas raws li cov yas deformation tob ntawm qhov indentation. 0.002 hli yog siv los ua lub tsev tawv tawv. Thaum HB> 450 lossis tus qauv me me dhau, lub brinell hardness kuaj tsis tuaj yeem siv thiab rockwell hardness ntsuas yog siv xwb. Nws siv lub pob zeb diamond lub khob cij nrog rau lub kaum sab xis ntawm 120 ° lossis lub cheeb tsam ntawm kev xeem, thiab lub zog ntawm cov khoom siv tau suav nrog qhov ntsuas ntawm indentation. Raws li qhov nyuaj ntawm cov khoom ntsuas, nws tau tshaj tawm hauv peb qhov sib txawv sib txawv:
HRA: Nws yog lub hardness tau los ntawm kev siv 60kg load thiab pob zeb diamond iav indenter, uas yog siv rau cov ntaub ntawv nrog cov khoom khov kho siab (xws li cov cemented carbide, thiab lwm yam).
HRB: Nws yog lub hardness tau los ntawm kev siv 100kg load thiab ib tug tawv steel pob nrog lub cheeb ntawm 1.58mm, uas yog cov annealed steel, cam khwb cia hlau, thiab lwm yam).
HRC: Nws yog lub hardness tau los ntawm kev siv 150kg load thiab pob zeb diamond iav indenter, uas yog siv rau cov khoom siv tawv tawv (xws li cov hlau tawv heev (thiab lwm yam).
Ntxiv rau:
1.Hrc txhais tau tias rockwell hardness c nplai.
2.HRC thiab HB tau siv dav hauv kev tsim khoom.
3.HRC muaj ntau yam HRC 20-67, sib npaug HB225-650,
Yog tias lub hardness yog siab dua qhov ntau,, siv rockwell hardness ib cora,
Yog tias lub hardness yog qis dua li no, siv rockwell hardness b nplai hrb,
Qhov kev txwv sab sauv ntawm Brinell hardness yog HB650, uas tsis tuaj yeem yog siab dua tus nqi no.
4.Qhov indenter ntawm rockwell hardness tester C ntsuas yog lub pob zeb diamond cone nrog lub kaum lub kaum sab xis ntawm 120 degrees. Qhov kev xeem thauj yog ib qho nqi. Tus qauv Suav yog 150 kgf. Tus indenter ntawm Brinell Hardness Tester yog lub pob steel tawv (hbs) lossis lub pob carbide (HBW). Qhov kev xeem thauj tau sib txawv nrog txoj kab uas hla ntawm lub pob, xws li 3000 rau 31.25 kgf.
5.Qhov pob zeb tawv tawv indentation yog me me heev, thiab ntsuas tus nqi yog ib cheeb tsam. Nws yog qhov tsim nyog los ntsuas ob peb lub ntsiab lus kom pom tus nqi nruab nrab. Nws yog qhov haum rau cov khoom tiav thiab cov hlais nyias thiab raug cais raws li qhov kev sim tsis yog kev ua phem. Lub brinell hardness indentation loj dua, ntsuas tus nqi ntsuas muaj tseeb, nws tsis yog qhov kev sim ua tiav raws li cov kev sim tsis ua txhaum cai uas tsis ua txhaum cai.
6. Lub hardness nqi ntawm rockwell hardness yog ib tus naj npawb tsis muaj npe yam tsis muaj chav nyob. (Yog li ntawd, nws tsis muaj tseeb tau hu rau Rockwell hardness li ib tug muaj nuj nqis ntawm brinell hardness muaj nyob rau hauv thiab muaj qee yam kev sib raug zoo nrog lub zog tensile.
7. Rockwell Hardness yog ncaj qha rau ntawm lub xov tooj lossis cov lej kom pom. Nws yog ib qho yooj yim rau kev ua haujlwm, nrawm thiab intuitive, thiab haum rau huab hwm coj ntau lawm. Brinell hardness yuav tsum tau lub tshuab tsom ntsuas ntsuas qhov indentation diam, thiab tom qab ntawd saib lub rooj lossis laij tawm, uas yog qhov ua kom ntau dua ua haujlwm.
8. Hauv qee qhov kev mob, HB thiab HB thiab HB thiab HRC tuaj yeem sib pauv los ntawm saib lub rooj. Lub hlwb kev muab cov mis hlwb tuaj yeem sau cia raws li: 1HRC≈1 / 10HB.
Kev ntsuas Hardness yog qhov yooj yim sim thiab yooj yim hauv cov khoom ntiag tug. Txhawm rau siv hardness kev ntsuam xyuas kom hloov cov cuab yeej cuab tam tau, muaj kev sib raug zoo dua ntawm kev sib raug zoo thiab lub zog yog qhov yuav tsum tau ua nyob rau hauv kev tsim khoom.
Kev xyaum tau ua pov thawj tias muaj kev sib raug zoo sib xws ntawm cov khoom siv tawv tawv ntawm cov ntaub ntawv hlau thiab nruab nrab ntawm tus nqi thiab lub zog muaj nuj nqis. Vim tias tus nqi hardness yog txiav txim siab los ntawm thawj zaug deformation tiv taus, ntau dua cov yas deformation tiv taus, thiab siab dua tus nqi hardness.
Lub sij hawm Post: Aug-16-2024
