Kugona kwezvinhu zvesimbi kuti urambe kusanzwisisika kwepamusoro nezvinhu zvakaoma zvinonzi kuomarara. Maererano nemaitiro akasiyana eyedzo uye chiyero chekushandisa, kuomarara kunogona kukamurwa kuita kuomarara, kuomarara, kuomesa, kuomesa, kuomarara, kuomesa microurness uye hupfumi hwekushisa. Kune matatu anowanzo shandiswa kuoma kwe pombi: brinell, rockwell, uye vickers kuomarara.
A. Brinell kuomarara (HB)
Shandisa bhora resimbi kana bhora rebhokisi reimwe diameter yekudzvanya mune sampuli pamusoro neiyo yakataurwa bvunzo simba (f). Mushure meiyo nguva yakatarwa yekubata, bvisa iyo yekuyedza simba uye kuyera iyo induentation diameter (l) pane sampula nzvimbo. Brinell kuomarara kukosha ndiyo quotient inowanikwa nekukamura iyo yekuyera simba nenzvimbo yemukati yeiyo indented sphere. Inoratidzwa muHBS (Simbi bhora), iyo unit ndeye N / MM2 (MM2 (MM2).
Iyo Complation Fomula ndeye:
Mune formula: f-iyo yekuyedza simba yakamanikidzwa mumusoro wesimbi sampula, n;
D-diameter yeiyo simbi bhora yekuedzwa, mm;
D-avhareji yedhivha yedunhu reInduction, mm.
Kuyerwa kweBrinell kuomarara kwakanyatsojeka uye kwakavimbika, asi kazhinji kwakakodzera chete kune zvigadzirwa zvesimbi pazasi 450n / mm2 (MM2), uye haina kukodzera kuomesa musoro kana mahwendefa akaonda. Pakati pematanda esimbi zviyero, kuomarara kweBrinell ndiko kushandiswa zvakanyanya zvakanyanya. Iyo Induction Diameter D inowanzoshandiswa kuratidza kuomesa kwezvinhu, izvo zviri zviviri zvinoenzanisa uye zviri nyore.
MUFANANIDZO:
B. Rockwell Hardness (HR)
Iyo Dombowell Hardness Bvunzo, seBrinell Kuedza Kuedza, inzira induction bvunzo. Musiyano ndewekuti rinoyera kudzika kweiyo induction. Ndokunge, pasi pekutevedzana kwekutanga kwekutanga muedzo (fo) uye huwandu hweyedzo yekuyera (f), iyo indender (cone kana bhora reganda renzvimbo) rinodzvanywa mumuenzaniso. Mushure meiyo nguva yakatarwa yekubata, simba guru rinobviswa. Force Force, shandisa iyo yakayerwa yakasara induction yakadzika yekuwedzera (e) kuverenga kukosha kwekuomesa. Kukosha kwaro inhamba isingazivikanwe, uye zviyero zvinoshandiswa zvinosanganisira zviyero zvina, zvinosanganisira a, b, c, g, c, c ::
Iko kukosha kwehuremu kunoverengerwa uchishandisa iyo inotevera formula:
Kana uchiedzwa neye uye c zviyero, hr = 100-e
Kana kuedzwa neB SALEN, HR = 130-E
Mufomula, e - iyo inosara indudation yakadzika inowedzera inotaurwa mune yakatarwa chikamu che 0.002mm Iyo yakakura iyo kukosha, iyo yakaderera kuomarara kwesimbi, uye zvinopesana.
Chiyero chinoshanda chezviyero zvatatu zviri pamusoro zviyero zvinotevera:
Hra (Diamond Cone Indenser) 20-88
HRC (DIAMOND CONE indenter) 20-70
HRB (DIAMETER 1.588MM STEEL BAR INTENTER) 20-100
Rockwell hardness yekuedzwa inzira yakashandiswa parizvino, pakati peiyo hrc inoshandiswa mune simbi pombi zviyero zvechipiri chete kuoma hb. Rockwell kuomarara kunogona kushandiswa kuyera zvinhu zvesimbi kubva kune zvakanyanyisa zvakapfava kusvika zvakanyanya. Inoita kuti uwane zvikanganiso zveBrinell nzira. Zviri nyore kupfuura nzira yeBrinell uye kukosha kwehuremu kunogona kuverengerwa zvakananga kubva kune dial yemuchina wekuoma. Nekudaro, nekuda kweiyo diki diki induction, kukosha kwehuremu hakuna kufanana nenzira yebrinell.
C. Vickers kuomesa (HV)
Iyo Vickers kuomesa bvunzo zvakare ndiyo nzira yekubvunda induction. Inomanikidza mramital piramidal Diamond Simba, kuyera kureba kwemaviri edziviri edzinza.
Iyo Vickers kuomesa kukosha ndiyo quotient yeiyo bvunzo yemasimba yakakamurwa nenzvimbo induction pamusoro. Yayo yekuverenga formula ndeye:
Mune formula: hv-vickers kuomesa chiratidzo, n / mm2 (mm2 (mpa);
F-test simba, n;
D-arithmetic zvinoreva nezve maviri enjira dzeInduction, mm.
Iyo yekuyedza yekuyedza Iko kukosha kwehuremu kunogona kuyerwa huwandu ndeye 5 ~ 1000hv.
Muenzaniso wenzira yekutaura: 640HV30 / 20 zvinoreva kuti vickers kuomesa kukosha kwakayerwa neyekuedzwa simba re30hgf (294.25) is 640n / mm2 (MM2 (MM2 (MM2 (MM2 (MM2 (MM2 (MM2 (MM2 (MM2 (MM2 (MM2 (MM2 (MM2 (MM2 (MM2 (MM2 (MM2 (MM2 (MM2 (MM2 (MM2 (MM2 (MM2 (MM2 (MM2 (MM2 (MM2).
Iyo vickers yakaoma nzira inogona kushandiswa kuona kuomesa kwezvinhu zvakaonda zvakanyanya zvesimbi uye nzvimbo dzepamusoro. Iyo ine zvakanakisa zvakanakira brinell uye nzira dzekutenderera uye dzinokurira zvikanganiso zvavo zvekutanga, asi hazvisi nyore seRombowell nzira. Vickers nzira haiwanzo kushandiswa mune simbi pombi zviyero.
Post Nguva: Kubvumbi 03-2024