ʻO ka waiwai paʻakikī o ka mea kila Tungsten a i ʻole nā ​​​​mea hana wili hui

ʻO ka paʻakikī ka hiki i kahi mea ke pale aku i nā mea paʻakikī e kaomi ana i kona ʻili. ʻO ia kekahi o nā hōʻailona hana nui o nā mea metala.

ʻO ka maʻamau, ʻoi aku ka kiʻekiʻe o ka paʻakikī, ʻoi aku ka maikaʻi o ka pale ʻana. ʻO nā papa kuhikuhi paʻakikī maʻamau ʻo Brinell hardness, Rockwell hardness a me Vickers hardness.

ʻO Brinell paakiki (HB)

E kaomi i ka poepoe kila paakiki o kekahi nui (maamau he 10 mm ke anawaena) iloko o ka ili waiwai me kekahi haawe (maamau he 3000 kg), a e malama ia no kekahi manawa. Ma hope o ka hoʻokuʻu ʻana, ʻo ka lakio o ka ukana i ka ʻāpana indentation ʻo ka helu paʻakikī Brinell (HB), a ʻo ka ʻāpana he kilokilika ikaika / mm2 (n / mm2).

2. ʻO ka paʻakikī o Rockwell (HR)

Ke liʻiliʻi loa ka HB> 450 a i ʻole ka laʻana, ʻaʻole hiki ke hoʻohana ʻia ke ana paʻakikī o Rockwell ma kahi o ka hoʻāʻo paʻakikī Brinell. He cone daimana me kahi kihi kiʻekiʻe o 120 degere a i ʻole pōpō kila me ke anawaena o 1.59 a me 3.18 mm. Hoʻokomo ʻia i ka ʻili o ka mea ma lalo o kekahi haʻahaʻa, a helu ʻia ka paʻakikī o ka mea mai ka hohonu o ka indentation. E like me ka ʻokoʻa paʻakikī o ka mea hoʻāʻo, hiki ke hōʻike ʻia e ʻekolu mau unahi like ʻole:

450 a i ʻole ka laʻana, ʻaʻole hiki ke hoʻohana ʻia ke ana paʻakikī o Rockwell ma kahi o ka hoʻāʻo paʻakikī Brinell. He cone daimana me kahi kihi kiʻekiʻe o 120 degere a i ʻole pōpō kila me ke anawaena o 1.59 a me 3.18 mm. Hoʻokomo ʻia i ka ʻili o ka mea ma lalo o kekahi haʻahaʻa, a helu ʻia ka paʻakikī o ka mea mai ka hohonu o ka indentation. E like me ka ʻokoʻa paʻakikī o ka mea hoʻāʻo, hiki ke hōʻike ʻia e ʻekolu mau unahi like ʻole:

HRA: Hoʻohana ʻia ka paʻakikī i loaʻa e ka ukana 60 kg a me ka indenter cone diamond no nā mea me ka paʻakikī kiʻekiʻe loa (e like me ka carbide cemented).

HRB: Loaʻa ka paʻakikī ma ka hoʻopaʻa ʻana i ka pōpō kila me ke anawaena o 1.58 mm a me ka ukana o 100 kg. Hoʻohana ʻia ia no nā mea me ka paʻakikī haʻahaʻa. (e like me ke kila annealed, hao hao, etc.).

HRC: Hoʻohana ʻia ka paʻakikī i loaʻa e ka ukana 150 kg a me ka indenter cone diamond no nā mea me ka paʻakikī kiʻekiʻe (e like me ke kila kinai ʻia).

3. Ka paakiki o Vickers (HV)