Pehea e hoʻoheheʻe ai i nā māwae Flange ma hope o ka wili ʻana

1. No ke aha i loaʻa ai kahi māwae flange ma hope o ke kuʻi ʻana

I ka hana ʻana i nā lako pahu, i ka wā i hoʻopaʻa ʻia ai ka flange stainless steel a me ka cylinder, e loaʻa nā māwae ma ka ʻāʻī o ka flange, ʻaʻole ma ka wili wili.He aha ka pilikia?No ke aha ke ʻano o ia ʻano?ʻO ka mea mua, e nānā kākou i nā kumu o nā māwae wela.

ʻO nā māwae wela nā māwae i hana ʻia ma ka pae wela kiʻekiʻe i ka wā o ka hoʻoluʻu ʻana o ka weld, ka nui ma ka weld metala, a me kahi liʻiliʻi ma kahi kokoke.Hiki ke hoʻokaʻawale ʻia i nā māwae crystallization (solidification), nā māwae liquefaction a me nā māwae polygonal.ʻO nā māwae Crystalline ke ʻano maʻamau, ʻoi loa i loko o nā welds o nā kila kalapona i loaʻa i nā mea haumia (S, P, Si a me C), hoʻokahi-phase austenitic stainless steels, aluminika a me kāna mau ʻāpana a me nā hale welded ʻē aʻe.ʻO nā kumu nui e hoʻoulu ai ʻo ia ke koʻikoʻi o ka welding tensile stress, ka haʻahaʻa heheʻe eutectic (ka hui kemika o ka weld metala), ke degere o ka wela nui o ka hui welded (kaʻina).

2.Pehea e pale aku ai i nā māwae wela

Ma ka hoʻoholo ʻana mai nā kiʻi, 304 stainless steel i ikaika ka plasticity.Inā he flange forged, ʻaʻole i hoʻokumu ʻia nā kaʻina hana kuʻi ʻana.Inā he hoʻolei ʻia, hiki ke hana ʻia kēia kūlana.No laila, ma ka hoʻomaʻamaʻa, pehea mākou e pale aku ai i nā māwae i ka ʻāpana hana?ʻO nā mea e hoʻemi ai i ka manaʻo o ka pohā wela, penei:

1) E ho'ēmi i ka maʻiʻo o nā mea haumia e like me S a me P i loko o ka mea.

2) Hiki i ka hoʻonui pono ʻana i ka ratio Mn / S ke hoʻololi i ka Fe o ka Fe-FeS haʻahaʻa hoʻoheheʻe eutectic e hana i ka MnS me kahi helu heheʻe o 1620Co, a laila e hoʻomaikaʻi ai i ka pale ʻana o ka weld.

WC=0.10~0.12%, WMn=2.5% ma mua o ka hana

WC=0.13~0.20%, WMn=1.8% a emi mai paha

WC = 0.21 ~ 0.23%, ʻoi aku ka liʻiliʻi o ka hopena maikaʻi o WMn.

3) E hoʻohana i nā ala a me nā kaʻina hana e hoʻopaʻa ai i ka hoʻokomo ʻana i ka ikehu laina a hoʻemi i ka weld overheating.

4) Hoʻohui iā Ti, Mo, Nb a i ʻole nā ​​​​mea ʻeleʻele ʻole i ka mea hoʻoheheʻe e pale i ka hoʻomohala ʻana o nā kolamu kolamu, hoʻomaʻemaʻe i nā kīʻaha, a hoʻomaikaʻi nui i ka hana.