(1) Weldability nke ígwè na aluminom na alloys ya
Ígwè, manganese, chromium, nickel na ihe ndị ọzọ dị na ígwè nwere ike jikọta ya na aluminom na ọnọdụ mmiri mmiri iji mepụta ngwọta siri ike dị oke, ma na-etolitekwa ogige intermetallic. Carbon na ígwè nwekwara ike ịmepụta ogige na aluminom, ma ọ fọrọ nke nta ka ha na ibe ha adabaghị na steeti siri ike. igbari. N'etiti ọdịnaya dị iche iche nke aluminom na ígwè, enwere ike ịmepụta ogige intermetallic dị iche iche, n'ime nke FeAls bụ nke kachasị agbaji.
Ọ nwere mmetụta dị ịrịba ama na ihe eji arụ ọrụ nke nkwonkwo welded nke ígwè na aluminom, gụnyere microhardness. Tụkwasị na nke ahụ, ebe ọ bụ na ihe ndị dị na thermophysical nke ígwè, aluminum na alloys ha dịkwa nnọọ iche, weldability nke ígwè na aluminom na-emebi.
(2) Usoro ịgbado ọkụ nke ígwè na aluminom na alloys ya
Site na nyocha nke a kpọtụrụ aha n'elu nke ígwè-aluminom weldability, ọ fọrọ nke nta ka ọ bụrụ na ọ gaghị ekwe omume ibelata mbelata ígwè na aluminom na alloys ya site na ịgbado ọkụ kpọmkwem.
Ọ fọrọ nke nta ka ọ bụrụ ihe na-agaghị ekwe omume iji ígwè ma ọ bụ alloy nke ihe ndị na-ekpo ọkụ dị n'etiti ígwè na aluminom na nke nwere ike iji metallurgically dakọtara na abụọ dị ka ihe nkpuchi maka ịgbado ọkụ ozugbo.
Na mmepụta omume, e nwere ụzọ abụọ: mkpuchi oyi akwa indirect Fusion ịgbado ọkụ na etiti mgbanwe ibe indirect fusion ịgbado ọkụ.
1) Usoro mkpuchi mkpuchi mkpuchi na-apụtaghị ìhè tupu a na-agbakọta ígwè na aluminom, otu ma ọ bụ ọtụtụ n'ígwé nke ígwè nwere ike iji metallurgically jikọtara ya na ihe kwesịrị ekwesị na-ekpuchi ígwè na-ebu ụzọ kpuchie n'elu ígwè ahụ iji mepụta akwa mkpuchi mkpuchi, ma mgbe ahụ. eji Gas tungsten arc ịgbado ọkụ usoro Usoro ịgbado ọkụ kpuchiri ígwè na aluminum.
gosiputara site na omume na ule:
Otu oyi akwa mkpuchi nwere ike igbochi oxidation nke isi metal, ma enweghị ike igbochi ọgbọ nke ogige intermetallic, na ike nkwonkwo ya ka dị ntakịrị. Ya mere, argon arc welding nke ígwè na aluminom kwesịrị iji mkpuchi ihe mejupụtara mee ihe.
Enwere ọtụtụ ihe igwe maka mkpuchi, dị ka Ni, Cu, Ag, Sn, Zn na ndị ọzọ. Ihe mkpuchi metal dị iche iche, na nsonaazụ mgbe ịgbado ọkụ dịkwa iche. Ihe mgbawa dị mfe ịmepụta na mkpuchi Ni, Cu, Ag composite; Ni, Cu, Sn mkpuchi ihe mejupụtara dị mma; Ni, Zn mkpuchi ihe mejupụtara nwere mmetụta kacha mma.
Argon arc ịgbado ọkụ nke ihe mejupụtara carbon steel na aluminom na alloys ya bụ ibu ụzọ yikwasị akwa akwa dị ka ọla kọpa ma ọ bụ ọlaọcha n'akụkụ nchara, wee yichie akwa zinc. Mgbe ịgbado ọkụ, zinc na-agbaze na mbụ (n'ihi na ebe mgbaze nke waya ịgbado ọkụ dị elu karịa nke zinc), na-ese n'elu mmiri mmiri.
Aluminom na-emeghachi omume na ọla kọpa ma ọ bụ ọlaọcha n'okpuru oyi akwa zinc, ma n'otu oge ahụ ọla kọpa na ma ọ bụ ọlaọcha na-agbaze na aluminom, nke nwere ike ịmepụta njikọ welded ka mma. Ọ nwere ike dịkwuo ike nke ígwè-aluminom welded nkwonkwo na 197 ~ 213MPa.
Mgbe a na-ekpuchi akụkụ ígwè ahụ, a pụrụ ịgwọ elu ígwè na aluminom. A na-emebi ọgwụgwọ elu nke akụkụ aluminom na 15% ~ 20% NaOH ma ọ bụ KOH ngwọta iji wepụ ihe nkiri oxide, kpochapu ya na mmiri dị ọcha, wee gafere na 20% HNO3, na-ekpochapụ, na njikere ịkpọ nkụ Mee argon arc welding.
Ihe mgbado ọkụ - họrọ waya ịgbado ọkụ aluminom dị ọcha na obere ọdịnaya silicon, ka enwere ike nweta nkwonkwo dị elu. O kwesịghị ekwesị iji waya ịgbado ọkụ nwere magnesium nwere (LFS), n'ihi na ọ ga-akwalite uto nke ogige intermetallic na enweghị ike ikwe nkwa ike nke nkwonkwo weld.
Usoro ịgbado ọkụ - ndị ikwu ọnọdụ nke workpiece, ịgbado ọkụ waya na tungsten electrode n'oge ịgbado ọkụ.
Iji gbochie ọkụ akaghi aka nke mkpuchi elu nchara, mgbe ị na-agbado weld mbụ, a ga-edobe welding arc mgbe niile na igwe ndochi; maka welds sochirinụ, a ga-edobe arc na waya filler na weld kpụrụ, ka o wee zere arc na-eme ihe na mkpuchi ozugbo.
Tụkwasị na nke ahụ, arc na-agagharị n'akụkụ elu nke akụkụ aluminom na waya ịgbado ọkụ aluminom na-agagharị n'akụkụ nchara, nke mere na aluminom mmiri mmiri na-asọba n'elu oghere nke nchara nke mejupụtara ígwè, na mkpuchi enweghị ike ịgba ọkụ n'oge na-adịghị anya ma tụfuo. mmetụta ya.
Nkọwapụta ịgbado ọkụ - argon arc welding nke ígwè na aluminom na-eji ike AC, otu bụ ịkụ ihe nkiri oxide ma gbajie ya, ọ nwekwara ike wepụ ihe nkiri oxide n'elu ọdọ mmiri a wụrụ awụ, nke mere na ígwè a wụrụ awụ nwere ike ịbụ. agwakọta nke ọma.
A na-ahọrọ ugbu a ịgbado ọkụ dị ka ọkpụrụkpụ nke weldment. N'ozuzu, mgbe efere ọkpụrụkpụ bụ 3mm, ịgbado ọkụ ugbu a bụ 110-130A; mgbe ọkpụrụkpụ efere bụ 6-8mm, ịgbado ọkụ ugbu a bụ 130-160A;
2) Usoro ịgbado ọkụ na-apụtaghị ìhè maka akụkụ mgbanwe nke etiti. Usoro ịgbado ọkụ a bụ itinye ogwe ihe mejupụtara nchara-aluminom dị n'etiti etiti aluminom iji mepụta nkwonkwo nke ha, ya bụ, nchara-steel na aluminom-aluminom nkwonkwo. Mgbe ahụ, jiri usoro ịgbado ọkụ a na-emekarị ka ọ bụrụ otu ígwè ahụ na nsọtụ abụọ ahụ n'otu n'otu.
Mgbe ị na-agbado ọkụ, ṅaa ntị na ịgbado nkwonkwo aluminum na nnukwu shrinkage na mfe thermal cracking mbụ, na mgbe ahụ ịgbado ọkụ nkwonkwo nkwonkwo.
Oge nzipu: Mar-22-2023
