Nā waiwai wiliwili o nā ʻano keleawe like ʻole

Welding waiwai o nā ʻano like ʻolenā hui keleawe:

1. He kiʻekiʻe ka conductivity thermal o ke keleawe ʻulaʻula.ʻO ka conductivity thermal o ke keleawe ʻulaʻula ma ka lumi wela ma kahi o 8 mau manawa ʻoi aku ka nui ma mua o ke kila kalapona.He paʻakikī ke hoʻomehana kūloko i ka weldment keleawe i ka wela hoʻoheheʻe.No laila, pono e hoʻohana ʻia kahi kumu wela me ka ikehu i ka wā wili.Hiki pinepine nā māwae i ka wā e wili ʻia ai ke keleawe a me ke keleawe.Aia nā māwae i loko o nā welds, nā laina hui a me nā ʻāpana wela.He pōʻino intergranular nā māwae, a ʻike ʻia ka waihoʻoluʻu oxidation mai ka ʻāpana keʻa.I ka wā o ke kaʻina hana crystallization, e ʻimi i ka oxygen a me ke keleawe ma ke ʻano Cu2O, a hana i kahi eutectic haʻahaʻa hoʻoheheʻe haʻahaʻa (α+Cu2O) me α keleawe, a ʻo kona helu heheʻe he 1064 ° C.

2. ʻAʻole hiki ke hoʻoheheʻe ʻia ke kēpau i loko o ke keleawe paʻa, a ʻo ke kēpau a me ke keleawe e hana i kahi eutectic hoʻoheheʻe haʻahaʻa me kahi helu heheʻe ma kahi o 326 ° C.Ma lalo o ka hana o ka welding kūloko stress, keleawe a me ke keleawe huila ma ka wela wela hana māwae i loko o ka fragile wahi o ka welded ami.Eia kekahi, hiki i ka hydrogen i loko o ka weld ke hana i nā māwae.Loaʻa pinepine ka porosity i nā welds o ke keleawe a me ke keleawe.ʻO ka porosity i loko o ke keleawe keleawe maʻemaʻe ke kumu nui ʻia e ke kinoea hydrogen.Ke hoʻoheheʻe ʻia ke kinoea CO i loko o ke keleawe maʻemaʻe, hiki ke kumu ʻia nā pores e ka mahu wai a me ke kinoea CO2 i hana ʻia e ka hopena o ka carbon monoxide a me ka oxygen.

3. ʻOi aku ka nui o ka hoʻokumu ʻana o ka porosity o ka wili keleawe keleawe ma mua o ke keleawe maʻemaʻe.ʻO ka maʻamau, ua māhele ʻia nā pores i waenakonu o ka weld a kokoke i ka laina fusion.Ke wili ʻia nā ʻāpana keleawe maʻemaʻe a me ke keleawe, ʻoi aku ka emi o nā waiwai mechanical o ka hui.I ke kaʻina hana kuʻi ʻana o nā ʻāpana keleawe, ka hoʻoneʻe keleawe, a me ka evaporation a me ka puhi ʻana o nā mea hoʻohui.ʻO ka eutectic haʻahaʻa haʻahaʻa haʻahaʻa a me nā hemahema wili like ʻole e alakaʻi i ka emi ʻana o ka ikaika, plasticity, corrosion resistance a me ka uila conductivity o ka hui welded.