Aluminom Tubes Induction Brazing

Iji mee ka arụmọrụ dịkwuo elu ma belata mmetụta okpomọkụ nke ikpo ọkụ metal, ihe ume nkwado teknụzụ na-atụ aro. Uru nke nkà na ụzụ a bụ n'ụzọ zuru ezu na ebe kpo oku na-enye na nkwonkwo brazed. Dabere na nsonaazụ simulation ọnụọgụ, ọ ga-ekwe omume ịchepụta paramita dị mkpa iji nweta okpomọkụ brazing n'oge achọrọ. Ebumnuche bụ iwetulata oge a ka ịzenarị mmetụta ọkụ na-achọghị na ọla ndị ahụ n'oge njikọta ọla..Nsonaazụ simulation ọnụọgụ gosiri na ịba ụba ugboro ugbu a butere itinye uche nke oke okpomọkụ na mpaghara elu nke ọla jikọtara ọnụ. Site na mmụba ugbu a, a hụrụ mbelata oge achọrọ maka iru okpomọkụ brazing.

Uru nke induction brazing nke aluminom vs. ọwa ma ọ bụ ire ọkụ brazing

Okpomọkụ na-agbaze nke ọla kọpa aluminom yana mpio usoro okpomọkụ dị warara nke braze alloys eji bụ ihe ịma aka mgbe ọwa brazing. Enweghị mgbanwe agba mgbe aluminom na-ekpo ọkụ anaghị enye ndị na-arụ ọrụ braze ihe ọ bụla na-egosi na aluminom erutela okpomọkụ brazing kwesịrị ekwesị. Ndị na-ahụ maka braze na-ewebata ọtụtụ mgbanwe mgbe ọ na-agba ọkụ. N'ime ndị a gụnyere ntọala ọkụ na ụdị ọkụ; anya site n'ọwa ruo n'akụkụ a na-agba ọkụ; ọnọdụ nke ire ọkụ n'akụkụ akụkụ na-ejikọta; na ndị ọzọ.

Ihe mere ị ga-eji tụlee iji itinye n'ọkwa kpo oku Mgbe brazing aluminum gụnyere:

  • Ngwa ngwa, kpo oku ngwa ngwa
  • Ejikwa, njikwa okpomọkụ nke ọma
  • Nhọrọ (nke mpaghara) okpomọkụ
  • Mmeghari ahịrị mmepụta na ntinye
  • Ndụ ndozi emelitere yana ịdị mfe
  • Njikọ brazed a pụrụ ịdabere na ya ugboro ugboro
  • Nchedo emelitere

Induction brazing nke ihe aluminom na-aga nke ọma na-adabere na nhazi induction kpo oku ilekwasị anya na ike okpomọkụ electromagnetic n'ime ebe a ga-agbaze ma kpoo ha n'otu n'otu ka braze alloy na-agbaze ma na-asọpụta nke ọma. Igwe nbata nke emebereghị nke ọma nwere ike ime ka mpaghara ụfọdụ na-ekpo oke ọkụ yana ebe ndị ọzọ anaghị enweta ike ọkụ zuru oke na-ebute nkwonkwo braze ezughị ezu.

Maka nkwonkwo tube aluminom brazed a na-ahụkarị, onye na-arụ ọrụ na-etinye mgbanaka braze aluminum, nke na-enwekarị flux, na tube aluminom wee tinye nke a n'ime tube gbasaa ọzọ ma ọ bụ ngọngọ dabara. A na-etinye akụkụ ndị ahụ n'ime eriri induction wee kpoo ọkụ. N'ime usoro nkịtị, ọla braze filler na-agbaze wee banye na njikọ njikọ n'ihi ọrụ capillary.

Gịnị kpatara induction braze vs. ọwa braze aluminum components?

Nke mbụ, ntakịrị ndabere na alloys aluminom nkịtị juru ebe niile taa yana braze aluminom na ndị na-ere ahịa ejiri maka ịbanye. Akụkụ aluminom brazing bụ ihe ịma aka karịa ngwa ọla kọpa brazing. Ọla kọpa na-agbaze na 1980ºF (1083°C) ọ na-agbanwe agba ka ọ na-ekpo ọkụ. Aluminium alloys nke a na-ejikarị na sistemu HVAC na-amalite ịgbaze na ihe dịka 1190°F (643°C) na anaghị enye akara ngosi ọ bụla, dị ka mgbanwe agba, ka ọ na-ekpo ọkụ.

Achọrọ njikwa ọnọdụ okpomọkụ nke ọma dị ka ọdịiche dị na mgbaze na okpomoku brazing maka aluminom, dabere na metal base metal, braze filler metal, na uka nke akụrụngwa a ga-agbaze. Dị ka ihe atụ, The okpomọkụ dị iche n'etiti solidus okpomọkụ nke abụọ nkịtị aluminum alloys, 3003 usoro aluminum, na 6061 usoro aluminum, na mmiri mmiri okpomọkụ nke ugboro ugboro BAlSi-4 braze alloy bụ 20 ° F - a dị warara okpomọkụ usoro window, si otú a mkpa. njikwa ziri ezi. Nhọrọ nke alloys ntọala dị oke mkpa na sistemu aluminom nke a na-eme brazed. Omume kachasị mma bụ ịgbanye ọkụ na okpomọkụ nke dị n'okpuru ebe okpomọkụ nke alloys na-eme ka ihe mejupụtara ahụ na-agbakọta ọnụ.

AWS A5.8 nhazi ọkwa Ngwakọta kemịkalụ aha Solidus Celsius F (°C) Liquidus Celsius F(°C) Okpomọkụ na-ekpo ọkụ
BAISi-3 86% Al 10% Si 4% Cu 970 (521) 1085 (855) 1085 ~ 1120 Celsius F
BAISI-4 88% aL 12% Si 1070 (577) 1080 (582) 1080 ~ 1120 Celsius F
78 Zn 22% Al 826 (441) 905 (471) 905 ~ 950 Celsius F
98% Zn 2% Al 715 (379) 725 (385) 725 ~ 765 Celsius F

Ekwesiri ighota na corrosion galvanic nwere ike ime n'etiti ebe ndi nwere zinc na aluminom. Dị ka e kwuru na galvanic chaatị dị na Figure 1, zinc adịchaghị mma ma na-emekarị ka ọ bụrụ anodic ma e jiri ya tụnyere aluminum. Dị ala nke nwere ike ịdị iche, na-ebelata ọnụego nke corrosion. Ihe dị iche n'etiti zinc na aluminom dị ntakịrị ma e jiri ya tụnyere ike dị n'etiti aluminom na ọla kọpa.

Ihe ọzọ na-eme mgbe aluminom na-eji zinc alloy brazed bụ pitting. Selụ mpaghara ma ọ bụ pitting corrosion nwere ike ime na ọla ọ bụla. A na-echebekarị aluminom site na ihe nkiri siri ike, dị gịrịgịrị nke na-etolite n'elu mgbe ikuku oxygen (aluminom oxide) na-ekpuchi ha ma mgbe mmiri na-ewepụ oyi akwa oxide a na-echebe, mgbasa nke aluminom nwere ike ime. Ogologo oge igwe ndochi ahụ na-anọgide na-agbaze, ka mgbasa na-esiwanye ike karị.

Aluminom na-etolite oyi akwa oxide siri ike n'oge brazing, yabụ ojiji nke flux dị mkpa. Enwere ike ịme ihe ndị na-eme ka aluminom na-agbagharị agbawa iche tupu emee brazing ma ọ bụ aluminom brazing alloy nwere flux nwere ike itinye n'ime usoro brazing. Dabere n'ụdị nrụgharị eji (corrosive vs. non-corrosive), enwere ike ịchọ mgbakwunye ọzọ ma ọ bụrụ na a ga-ewepụrịrị ihe fọdụrụ n'ime mmiri ka emechara brazing. Kpọtụrụ onye na-emepụta braze na flux ka ị nweta ndụmọdụ gbasara brazing alloy na flux dabere na ihe ndị a na-ejikọta yana okpomọkụ brazing a na-atụ anya ya.

 

Aluminom Tubes Induction Brazing