Pehea e koho ai i ka mea hōʻike paʻakikī no ka hoʻāʻo ʻana i nā laʻana tubular?

1) Hiki ke hoʻohana ʻia kahi mea hōʻike paʻakikī ʻo Rockwell e hoʻāʻo i ka paʻakikī o ka pā paipu kila?

ʻO ka mea hoʻāʻo he paipu kila SA-213M T22 me ke anawaena o waho o 16mm a me ka mānoanoa pā o 1.65mm. Penei nā hopena hoʻāʻo o ka hoʻāʻo paʻakikī ʻo Rockwell: Ma hope o ka wehe ʻana i ka unahi oxide a me ka papa decarburization ma ka ʻili o ka hāpana me kahi wili, ua kau ʻia ka hāpana ma luna o kahi papa hana V-like, a hoʻohana ʻia ka HRS-150S digital Rockwell hardness tester e hoʻāʻo pololei i ka paʻakikī o Rockwell ma kona ʻili waho me ka ukana o 980.7N. Ma hope o ka hoʻāʻo ʻana, hiki ke ʻike ʻia he liʻiliʻi ka deformation o ka paia paipu kila, a ʻo ka hopena, ʻo ka waiwai paʻakikī ʻo Rockwell i ana ʻia he haʻahaʻa loa, e hopena i ka hoʻāʻo ʻole.

Wahi a GB / T 230.1-2018 «Metallic Materials Rockwell Hardness Test Part 1: Test Method», ʻo ka Rockwell hardness he 80HRBW a ʻo ka liʻiliʻi loa o ka mānoanoa hāpana he 1.5mm. ʻO ka mānoanoa o ka hāpana No. 1 he 1.65mm, ʻo ka mānoanoa o ka papa decarburized he 0.15 ~ 0.20mm, a ʻo ka mānoanoa o ka hāpana ma hope o ka wehe ʻana i ka papa decarburized he 1.4 ~ 1.45mm, kahi kokoke i ka mānoanoa liʻiliʻi o ka hāpana i kuhikuhi ʻia ma GB / T 230.1-2018. I ka wā o ka hoʻāʻo ʻana, no ka mea ʻaʻohe kākoʻo ma ke kikowaena o ka hāpana, e hoʻoneʻe iki ia (ʻaʻole ʻike ʻia e ka maka maka), no laila ua haʻahaʻa ka waiwai paʻakikī o Rockwell.

2) Pehea e koho ai i ka mea hōʻike paʻakikī o ka ʻili no nā paipu kila:

Ma hope o nā hoʻokolohua he nui i ka paʻakikī o ka ʻili o nā paipu kila, ua hiki mai kā mākou hui i kēia mau hopena:

1. I ka hana 'ana i ka ho'ā'o 'o Rockwell hardness a i 'ole 'o Rockwell hardness test ma luna o ka ili o nā paipu kila lahilahi, 'a'ole lawa ke kāko'o o ka pā paipu e ho'opō'ino i ka specimen a alaka'i i nā hopena ho'ā'o ha'aha'a;

2. Inā hoʻohui ʻia kahi kākoʻo cylindrical i waenakonu o kahi paipu kila lahilahi, e haʻahaʻa nā hopena o ka hoʻāʻo ʻana no ka mea ʻaʻole hiki ke hoʻopaʻa ʻia ke koʻi o ke poʻo kaomi a me ke kuhikuhi o ka hoʻouka ʻana i ka ili o ka paipu kila, a aia kahi āpau ma waena o ka ʻili o waho o ka paipu kila a me ke kākoʻo cylindrical i hoʻokomo ʻia.

3. ʻO ke ʻano o ka hoʻololi ʻana i ka paʻakikī Vickers i ana ʻia i ka paʻakikī ʻo Rockwell ma hope o ka hoʻokomo ʻana a me ka hoʻoliʻi ʻana i ka hāpana paipu kila.

4. Ma hope o ka wehe 'ana i ka oxide unahi a me ka decarburization papa ma luna o ka ili o ka paipu kila a me ka machining ka ho'āʻo mokulele ma luna o waho ili a inlaying ia, ka ili Rockwell paakiki ua hoohuliia i Rockwell paakiki, i mea pololei.