Pehea e koho ai i ka mea ho'āʻo paʻakikī kūpono no nā kaola pōʻai kalapona

I ka hoʻāʻo ʻana i ka paʻakikī o nā kaola pōʻai kalapona me ka paʻakikī haʻahaʻa, pono mākou e koho i ka mea hoʻāʻo paʻakikī e hōʻoia i ka pololei a me ka maikaʻi o nā hopena hōʻike. Hiki iā mākou ke noʻonoʻo e hoʻohana i ka pālākiō HRB o ka mea hōʻike paʻakikī ʻo Rockwell.

Hoʻohana ka pālākiō HRB o ka mea hōʻike paʻakikī ʻo Rockwell i ka indenter pōpō kila me ke anawaena o 1.588mm a me ka ikaika hoʻāʻo like o 100KG. Hoʻonohonoho ʻia ke ana ʻana o ka pālākiō HRB ma 20-100HRB, kahi kūpono no ka hoʻāʻo ʻana i ka paʻakikī o ka hapa nui o nā mea hao kalapona me ka ʻoi aku ka paʻakikī.

1. Inā ua kinai ʻia ke kalapona kila a puni a he kiʻekiʻe ka paʻakikī ma kahi o HRC40 - HRC65, pono ʻoe e koho i kahi hōʻike paʻakikī Rockwell. He maʻalahi a wikiwiki hoʻi ka hana ʻana o ka Rockwell hardness tester, a hiki ke heluhelu pololei i ka waiwai o ka paʻakikī, kūpono no ke ana ʻana i nā mea paʻakikī kiʻekiʻe.

2. No kekahi mau kalapona kalapona poepoe i hanaia me ka carburizing, nitriding, etc., he kiekie ka paakiki o ka ili a he haahaa ka paakiki kumu. Inā pono e ana pono i ka paʻakikī o ka ʻili, hiki ke koho ʻia kahi hōʻike paʻakikī Vickers a i ʻole ka mea hōʻike microhardness. He huinaha ka indentation o ka hoao paakiki Vickers, a ua heluia ka waiwai paakiki ma ke ana ana i ka loa diagonal. He kiʻekiʻe ka pololei o ke ana ʻana a hiki ke hoʻohālikelike pono i nā loli paʻakikī ma ka ʻili.

3. Ma waho aʻe o ka pālākiō HRB o ka Rockwell hardness tester, hiki ke hoʻohana ʻia ka Brinell hardness tester no ka hoʻāʻo ʻana i ka haʻahaʻa haʻahaʻa carbon steel round bar. I ka ho'āʻo 'ana i ka kalapona kila poepoe kaola, kona indenter e waiho i ka nui o ka indentation ma luna o ka ili o ka mea, i hiki oi comprehensively a comprehensively hōʻike i ka awelika paakiki o ka mea. I ka wā o ka hana ʻana o ka mea hōʻike paʻakikī, ʻaʻole wikiwiki a maʻalahi hoʻi ka mea hōʻike paʻakikī ʻo Brinell e like me ka mea hōʻike paʻakikī ʻo Rockwell. ʻO ka mea hōʻike paʻakikī Brinell ka pālākiō HBW, a ʻokoʻa nā indents like ʻole me ka ikaika hoʻāʻo. No na kaola kalapona poepoe me ka oolea haahaa, e like me na mea i hoopiliia, ma kahi o HB100 – HB200 ka paakiki, a hiki ke koho ia ka mea hoao paakiki Brinell.

4. No ka kalapona kila poepoe kaola me ka nui anawaena a me ka maʻamau kinona, like 'ole oolea ho'āʻo mea maʻamau pili. Eia nō naʻe, inā liʻiliʻi ke anawaena o ka pā poepoe, e like me ka liʻiliʻi ma mua o 10mm, hiki i ka mea hōʻike paʻakikī Brinell ke hoʻopili i ka pololei o ke ana ʻana ma muli o ke kaha nui. I kēia manawa, hiki ke koho ʻia ʻo Rockwell hardness tester a i ʻole Vickers hardness tester. ʻOi aku ka liʻiliʻi o ka nui indenter a hiki ke ana pono i ka paʻakikī o nā mea liʻiliʻi liʻiliʻi.

5. No ke ano irregularly carbon steel poepoe kaola i paʻakikī e kau ma luna o ka workbench o ka maʻamau paakiki ho'āʻo no ke ana, hiki ke koho i ka paʻakikī paʻakikī, e like me Leeb paʻakikī. Hoʻohana ʻo ia i kahi hāmeʻa hopena e hoʻouna i kahi kino hopena i ka ʻili o ka mea i ana ʻia, a helu i ka waiwai paʻakikī e pili ana i ka wikiwiki o ke kino hopena. He maʻalahi ka hana a hiki ke hana i nā ana ma ka pūnaewele ma nā mea hana o nā ʻano like ʻole a me nā nui.