Qhov sib txawv tseem ceeb ntawm HRC thiab HRB yog tias HRC hardness nplai siv lub pob zeb diamond spheroconical li nws qhov indenter, qhov HRB hardness nplai siv lub pob 1/16-nti ua lub indenter.
HRC thiab HRB yog cov nplais tawv tawv uas tau los ntawm Rockwell hardness nplai nyob ntawm qhov indenter uas siv rau kev ntsuas.
Rockwell Hardness Scale yog dab tsi?
Rockwell hardness scale yog ib qho kev ntsuas uas peb tuaj yeem siv los txiav txim siab qhov nyuaj nyob ntawm qhov indentation hardness ntawm cov khoom. Rockwell test ntsuas qhov tob ntawm kev nkag mus ntawm lub indenter nyob rau hauv lub xub ntiag ntawm ib tug loj load nyob rau hauv kev sib piv rau qhov nkag mus los ntawm ib tug preload. Tsis tas li ntawd, muaj cov nplai sib txawv siv cov khoom sib txawv lossis cov indenters uas peb tuaj yeem pom los ntawm ib tsab ntawv. Cov nplai no feem ntau hu ua HRA, HRB, HRC, thiab lwm yam. Tsab ntawv kawg ntawm txhua nqe lus no yog hais txog cov nplai Rockwell. "HR" hauv cov ntsiab lus no yog hais txog "Rockwell Hardness." Cov nplais feem ntau ntawm lawv yog HRC thiab HRB nplai.
Daim duab 01: Rockwell Hardness Tester
Peb tuaj yeem muab Rockwell hardness hauv qhov sib npaug raws li hauv qab no:
HR=N – hd
Qhov twg HR hais txog Rockwell hardness, N thiab h yog qhov ntsuas qhov ntsuas uas nyob ntawm qhov ntsuas peb siv (xws li HRC lossis HRB), thiab d yog qhov tob hauv millimeters. Qhov tob yog xam los ntawm xoom load point.
HRC yog dab tsi?
HRC yog qhov ntsuas qhov nyuaj tau los ntawm Rockwell hardness nplai, thiab nws cov indenter yog "spheroconical pob zeb diamond."Qhov loj load hais txog qhov hardness nplai yog 150 kgf. Qhov ntsuas no muaj txiaj ntsig zoo hauv kev ntsuas qhov hardness ntawm cov ntaub ntawv xws li steel, tawv cam khwb cia hlau, pearlitic malleable hlau, titanium, sib sib zog nqus rooj plaub-hardened steel, thiab lwm yam ntaub ntawv uas nyuaj tshaj 100 HRB. N thiab h yam rau qhov hardness scale no yog 100 thiab 500, feem. HRB scale muab ib tug dimensionless tus lej raws li tus nqi.
HRB yog dab tsi?
HRB yog qhov ntsuas qhov hnyav tau los ntawm Rockwell hardness nplai, thiab nws cov indenter yog 1/16 nti pob. Qhov loj load ntawm no hardness nplai yog 100 kgf. Qhov ntsuas no muaj txiaj ntsig zoo hauv kev ntsuas qhov hardness ntawm cov ntaub ntawv xws li tooj liab alloys, mos steels, aluminium alloys, thiab malleable hlau. Ntxiv mus, N thiab h yam rau qhov hardness nplai yog 130 thiab 500, feem. Qhov ntsuas no muab tus lej tsis muaj qhov ntsuas raws li tus nqi.
Qhov Zoo sib xws ntawm HRC thiab HRB yog dab tsi?
- HRC thiab HRB yog cov nplais tawv tawv tau los ntawm Rockwell hardness nplai.
- Lawv siv indenters rau ntsuas.
- Ob leeg muaj qhov sib npaug h qhov ntsuas ntawm 500.
- Lawv muab tus lej tsis muaj qhov ntsuas raws li tus nqi.
Qhov txawv ntawm HRC thiab HRB yog dab tsi?
HRC thiab HRB yog cov nplai hardness uas tau los ntawm Rockwell hardness nplai nyob ntawm qhov indenter uas siv rau kev ntsuas. Qhov sib txawv tseem ceeb ntawm HRC thiab HRB yog tias HRC hardness scale siv lub pob zeb diamond spheroconical raws li nws cov indenter, whereas HRB hardness scale siv 1/16 nti pob ua lub indenter. Ntxiv mus, qhov loj load ntawm HRC yog 150 kgf, thaum lub load loj ntawm HRB yog 100 kgf.
Tsis tas li ntawd, HRC yog siv los ntsuas qhov hardness ntawm cov ntaub ntawv xws li steel, tawv cam khwb cia hlau, pearlitic malleable hlau, titanium, sib sib zog nqus rooj plaub-hardened steel, thiab lwm yam ntaub ntawv uas nyuaj tshaj 100 HRB. HRB, ntawm qhov tod tes, yog siv los ntsuas qhov hardness ntawm cov ntaub ntawv xws li tooj liab alloys, mos steels, aluminium alloys, thiab malleable hlau.
Cov hauv qab no qhia txog qhov sib txawv ntawm HRC thiab HRB hauv daim ntawv teev npe rau ib sab ntawm kev sib piv.
Summary – HRC vs HRB
HRC thiab HRB yog cov nplais tawv tawv tau los ntawm Rockwell hardness nplai. Qhov sib txawv tseem ceeb ntawm HRC thiab HRB yog tias HRC hardness scale siv lub pob zeb diamond spheroconical raws li nws cov indenter, whereas HRB hardness scale siv 1/16 nti pob raws li lub indenter.
