He aha ka hardfacing

ʻO ka hardfacing ka waiho ʻana o nā ʻili mānoanoa o nā mea paʻa a paʻa ʻole i ka ʻaʻahu ma luna o kahi ʻāpana ʻeleʻele a i ʻole nā ​​​​mea hou i hiki ke komo.ma ke kuʻi ʻana, hoʻopuʻi wela, a i ʻole ka hana like. Hoʻohana maʻamau ka hoʻoheheʻe ʻana i ka wela, spray-fuse a me nā kaʻina hana hoʻoheheʻe no ka hoʻopili ʻana i ka papa paʻakikī. Loaʻa nā mea hoʻohana maʻamau i nā ʻāpana kobalt (e like me tungsten carbide), nā huila nickel-based,chromium carbidenā huila, etc. Hoʻopili ʻia ka hardfacing i kekahi manawa me ka hoʻopaʻa ʻana i ka ʻāpana a hoʻohui i ke kala a i ʻole ka ʻike aʻo i ka ʻāpana. Hiki ke hoʻohana ʻia nā kīʻaha a i ʻole nā ​​kiʻiʻoniʻoni no ka nānā metala a i ʻole ka pale ʻē aʻe

ʻOi aku ka maikaʻi o ka hoʻoulu ʻana i ka wela no nā noi e koi ana i ka distortion thermal liʻiliʻi o ka ʻāpana a me ka hoʻokele kaʻina hana maikaʻi. ʻO nā mea paʻakikī maʻamau i waiho ʻia e ka hoʻoheheʻe wela me nā cermets e like me WC-Co a me nā seramika alumina. Hoʻopili ʻia kēia mau uhi i kahi mānoanoa o kahi o 0.3mm.

Hoʻopili mua ʻia ka uhi ʻana o ka spray-fuse i ka uhi uhi iho-fluxing i ka ʻili o ka ʻāpana me ka hoʻohana ʻana i ke kaʻina hana puhi ahi a laila hoʻohui ʻia me ka lama oxyacetylene a i ʻole RF induction coil. Hoʻomaʻomaʻo ka ʻili i hoʻohui ʻia i ka ʻili o ka substrate e hana i kahi uhi i hoʻopaʻa ʻia me ka metallurgically i ka substrate a ʻaʻohe porosity. Loaʻa nā ʻano alloy like ʻole i hoʻohana ʻia me ke kaʻina hana spray-fuse, ʻo ka mea nui e pili ana i ka ʻōnaehana alloy Ni-Cr-B-Si-C. Ma muli o ka haku mele ʻana, hoʻoheheʻe lākou ma ka laulā o 980 a 1200 ° C. 

Hoʻohana ʻia ke alo paʻa weld e waiho i nā ʻāpana mānoanoa loa (1 a 10mm) o nā mea ʻaʻahu me ka ikaika paʻa kiʻekiʻe. Hiki ke hoʻohana ʻia nā ʻano hana kuʻikuʻi like ʻole, me ke kinoea metala-inert (MIG), tungsten inertkinoea (TIG), plasma hoʻoili arc (PTA), submerged arc (SAW), a manual metal arc (MMA). Hiki ke hoʻohana ʻia kahi ākea ākea o nā mea uhi. Loaʻa iā lākou nā ʻāpana kobalt-based (tungsten carbide etc.), nā kila martensitic a me ka wikiwiki kiʻekiʻe, nā nickel alloys a me WC-Co cemented carbide. Ma hope o ka waiho ʻana e kekahi o nā kaʻina hana kuʻi ʻana i luna, pono pinepine e hoʻopau i ka ʻili o ka ʻāpana.

Hiki ke waiho ʻia ka hardfacing e nā ʻano hana welding:

·ʻO ke kuʻi ʻana metala metala pale

·ʻO ka wiliwili metala arc kinoea, me ka hoʻoheheʻe ʻia ʻana o ka pale kinoea a me ka hāmama

·ʻOxyfuel wiliwili

·Piʻi ʻiaarc welding

·Electroslag welding

·Plasma transfered arc welding, i kapa ʻia hoʻi ka welding plasma pauda

·Hoʻopā wela

·Huina polimer anu

·Hoʻopili laser

·Paʻa paʻa