Hardness Value Of Tungsten Steel Tool Or Alloy Milling Tool

Kuomarara ndiko kugona kwechinhu kuramba zvinhu zvakaoma zvinodzvanyirira pamusoro pacho. Icho chimwe chezviratidzo zvakakosha zvekushanda kwezvinhu zvesimbi.

   Kazhinji, iyo yakakwirira kuoma, zviri nani kupfeka kuramba. Iwo anowanzo shandiswa kuomarara indexes ndeye Brinell kuomarara, Rockwell kuomarara uye Vickers kuomarara.

Brinell kuoma (HB)

Dzvanya bhora rakaomeswa resimbi yeimwe saizi (kazhinji 10 mm mudhayamita) mukati mechinhu chepamusoro neimwe mutoro (kazhinji 3000 kg), uye uichengete kwenguva yakati. Mushure mekuburutsa, chiyero chemutoro kune indentation nzvimbo ndeye Brinell kuomarara nhamba (HB), uye iyo unit ikirogiramu simba / mm2 (n / mm2).

2. Rockwell kuoma (HR)

Kana HB> 450 kana sampuli iri diki zvakanyanya, Rockwell kuomarara kuyerwa hakugone kushandiswa pachinzvimbo cheBrinell kuomarara bvunzo. Ikoni yedhaimondi ine kona yepamusoro ye120 madhigirii kana bhora resimbi rine dhayamita re1.59 uye 3.18 mm. Inodzvinyirirwa pamusoro pezvinhu pasi peimwe mutoro, uye kuoma kwezvinhu kunoverengwa kubva pakadzika kwe indentation. Zvinoenderana nekuoma kwakasiyana kweiyo bvunzo zvinhu, inogona kuratidzwa nezviyero zvitatu zvakasiyana:

450 kana sampuli iri diki zvakanyanya, Rockwell kuomarara kuyerwa hakugone kushandiswa pachinzvimbo cheBrinell kuomarara bvunzo. Ikoni yedhaimondi ine kona yepamusoro ye120 madhigirii kana bhora resimbi rine dhayamita re1.59 uye 3.18 mm. Inodzvinyirirwa pamusoro pezvinhu pasi peimwe mutoro, uye kuoma kwezvinhu kunoverengwa kubva pakadzika kwe indentation. Zvinoenderana nekuoma kwakasiyana kweiyo bvunzo zvinhu, inogona kuratidzwa nezviyero zvitatu zvakasiyana:

HRA: Kuoma kunowanikwa ne60 kg mutoro uye diamond cone indenter inoshandiswa kune zvinhu zvine kuoma kwakanyanya (senge simende carbide).

HRB: Kuoma kunowanikwa nekuomesa bhora resimbi nehupamhi hwe1.58 mm uye mutoro we100 kg. Inoshandiswa kune zvinhu zvine kuomarara kwakaderera.(senge annealed steel, cast iron, etc.).

HRC: Kuoma kunowanikwa ne150 kg mutoro uye diamond cone indenter inoshandiswa kune zvinhu zvine kuoma kwakanyanya (senge simbi yakadzima).

3. Vickers kuoma (HV)