Mgbado ọkụ laserenwere ike nweta ya site na iji eriri laser na-aga n'ihu ma ọ bụ pulsed. Ụkpụrụ nkeịgbado ọkụ lasernwere ike kewaa okpomọkụ conduction ịgbado ọkụ na laser miri penetration ịgbado ọkụ. Mgbe ike njupụta bụ ihe na-erughị 104 ~ 105 W / cm2, ọ bụ okpomọkụ conduction ịgbado ọkụ. N'oge a, omimi nke ịbanye na-emighị emi na ịgbado ọkụ na-adị ngwa ngwa; mgbe ike njupụta dị ukwuu karịa 105 ~ 107 W / cm2, metal elu bụ concave n'ime "oghere" n'ihi okpomọkụ, na-akpụ miri penetration ịgbado ọkụ, nke nwere Ọ nwere àgwà nke ngwa ngwa ịgbado ọkụ ọsọ na nnukwu akụkụ ruru. Ụkpụrụ nke nchịkwa okpomọkụịgbado ọkụ laserbụ: laser radieshon na-ekpo ọkụ n'elu ka a na-ahazi, na elu okpomọkụ na-agbasa n'ime ime site thermal conduction. Site n'ịchịkwa laser parameters dị ka laser usu obosara, ume, elu ike, na ugboro ugboro ugboro, workpiece na-agbaze na-etolite a kpọmkwem ọdọ mmiri a wụrụ awụ.
Mgbado ọkụ laser miri emi na-ejikarị eriri laser na-aga n'ihu iji mezue njikọ nke ihe. Usoro anụ ahụ nke ọla ya yiri nke elektrọn doo ịgbado ọkụ, ya bụ, a na-emecha usoro ntụgharị ume site na nhazi “isi oghere”.
N'okpuru irradiation laser na oke ike zuru oke, ihe ahụ na-ekpochapụ na obere oghere na-etolite. Obere oghere a jupụtara na uzuoku dị ka ahụ ojii, na-amịkọrọ ihe fọrọ nke nta ka ọ bụrụ ike niile nke ọkụ ọkụ ahụ merenụ. Okpomọkụ nha n'ime oghere ahụ ruru ihe dịka 2500°C. A na-ebufe ọkụ ahụ site na mgbidi dị n'èzí nke oghere dị elu, na-eme ka ígwè dị gburugburu oghere ahụ gbazee. Obere oghere na-ejupụta na uzuoku dị elu nke na-emepụta site na ikpochapụ na-aga n'ihu nke ihe mgbidi n'okpuru irradiation nke osisi. Mgbidi nke obere oghere gbara ya gburugburu site gbazee ígwè, na mmiri mmiri metal gbara ya gburugburu site siri ike ihe (na ọtụtụ omenala ịgbado ọkụ Filiks na laser conduction ịgbado ọkụ, ike mbụ Deposited n'elu nke workpiece na mgbe ahụ na-ebuga n'ime ime site nyefe. ). The mmiri mmiri eruba n'èzí oghere mgbidi na elu esemokwu nke mgbidi oyi akwa na-na-adọ na-aga n'ihu emepụta uzuoku mgbali na oghere oghere na-enwe a ike itule. Igwe ọkụ na-aga n'ihu na-abanye n'ime obere oghere, na ihe dị n'èzí obere oghere na-aga n'ihu. Ka ọkụ ọkụ na-agagharị, obere oghere ahụ na-adị mgbe niile na ọnọdụ kwụsiri ike.
Ya bụ, obere oghere ahụ na ọla a wụrụ awụ nke gbara mgbidi oghere ahụ na-aga n'ihu na-aga n'ihu na-aga n'ihu na-aga n'ihu nke okporo osisi pilot. Igwe a wụrụ awụ na-ejupụta oghere fọdụrụ mgbe e wepụrụ obere oghere ahụ wee gbakọọ ya, wee mepụta weld ahụ. Ihe a niile na-eme ngwa ngwa nke na ọsọ ịgbado ọkụ nwere ike iru ọtụtụ mita n'otu nkeji.
Mgbe anyị ghọtachara echiche ndị bụ isi nke njupụta ike, ịgbado ọkụ thermal conductivity, na ịgbado ọkụ miri emi, anyị ga-emezi nyocha ntụnyere nke ike njupụta na akụkụ metallographic nke dị iche iche isi dayameta.
Tụnyere nnwale ịgbado ọkụ dabere na dayameta isi laser nkịtị na ahịa:
Ike njupụta nke focal ntụpọ ọnọdụ nke lasers dị iche iche isi dayameta
Site n'echiche nke njupụta ike, n'okpuru otu ike ahụ, nke dị ntakịrị na dayameta isi, na-egbuke egbuke nke laser na ike na-etinyekwu ike. Ọ bụrụ na ejiri laser tụnyere mma dị nkọ, obere dayameta isi, ka laser ahụ na-akawanye mma. Ike ike nke 14um core dayameta laser bụ ihe karịrị ugboro 50 nke 100um core dayameta laser, na ike nhazi dị ike karị. N'otu oge ahụ, njupụta ike gbakọrọ ebe a bụ naanị njupụta dị mfe. Nkesa ike n'ezie bụ nkesa Gaussian dị ka nkesa, na ike etiti ga-abụ ugboro ugboro nke njupụta ike.
Eserese atụmatụ nke ikesa ike laser nwere dayameta isi dị iche iche
Agba nke eserese nkesa ike bụ ikesa ike. Na agba uhie uhie, ike dị elu. Ike na-acha uhie uhie bụ ebe a na-etinye ike. Site na ikesa ike laser nke eriri laser dị iche iche dị iche iche, enwere ike ịhụ na n'ihu laser adịghị nkọ na ọkụ laser dị nkọ. Dị ntakịrị, ka ike na-etinyekwu uche na-adị n'otu ebe, otú ahụ ka ọ na-adị nkọ ma na-esiwanye ike ịbanye n'ime ya.
Ntụle nke ịgbado ọkụ mmetụta nke lasers dị iche iche isi diameters
Ntụle nke lasers nwere dayameta isi dị iche iche:
(1) Nnwale ahụ na-eji ọsọ nke 150mm / s, ịgbado ọkụ ọnọdụ na-elekwasị anya, na ihe bụ 1 usoro aluminum, 2mm oké;
(2) Ka nnukwu dayameta isi dị, ka obosara na-agbaze, na-ebuwanye ibu na mpaghara okpomọkụ na-emetụta, na obere ike njupụta. Mgbe isi dayameta gafere 200um, ọ dịghị mfe iji nweta a penetration omimi na elu-mmeghachi omume alloys dị ka aluminom na ọla kọpa, na a elu miri penetration ịgbado ọkụ nwere ike nweta naanị na ike dị elu;
(3) Obere-isi lasers nwere ike dị elu ma nwee ike ịkụnye igodo igodo ngwa ngwa n'elu ihe ndị nwere ike dị elu na obere mpaghara okpomọkụ metụtara. Otú ọ dị, n'otu oge ahụ, elu nke weld bụ ihe siri ike, na ohere ịdaba keyhole dị elu n'oge ịgbado ọkụ dị ala, a na-emechikwa keyhole n'oge usoro ịgbado ọkụ. okirikiri ahụ dị ogologo, na ntụpọ dị ka ntụpọ na pores na-adịkarị mfe ime. Ọ dị mma maka nhazi ma ọ bụ nhazi ngwa ngwa na trajectory swing;
(4) Large isi dayameta lasers nwere nnukwu ìhè tụrụ na ike gbasasịa ọzọ, na-eme ka ha bụrụ ndị dabara adaba maka laser elu remelting, cladding, annealing na ndị ọzọ Filiks.
Oge nzipu: Ọkt-06-2023
