amakuru

Kuki stomata igaragara？

1.1 Imbere yumwobo wasizwe na lazeri uri muburyo bwo kunyeganyega kudahindagurika, kandi imigezi yumwobo na pisine yashongeshejwe birakomeye.Imyuka y'icyuma imbere mu mwobo irasohoka igana kuriumuyagabyakozwe mugukingura umwobo, kuzunguruka gaze irinda (Ar) munsi yumwobo, hamwe naumwobo ujya imbere, imyuka irinda izinjira muri pisine yashongeshejwe muburyo bwinshi.Bitewe no gukemuka gukabije kwa Ar hamwe nigipimo cyihuta cyo gukonjesha cya laser yo gusudira, ibibyimba bisigara mumasuderi mbere yo guhungagukora stomata.Ikirenze ibyo, nibyatewe nauburinzi bubi mugihe cyo gusudira ko azote yinjira muri pisine yashongeshejwe hanze, kandi gukomera kwa azote mu cyuma cyamazi biratandukanye cyane no gukomera kwa azote mu cyuma gikomeye.Kubwibyogukonjesha no gukomera kwicyuma, ibishishwa bya azote bigabanuka hamwe no kugabanuka kwubushyuhe mugihe icyuma cya pisine gishongeshejwe gikonje kugeza intangiriro yo korohereza ibintu bishobora gutuma kugabanuka gukabije gutunguranye.Muri iki gihe, imyuka myinshi ya gaze izagerwahoform bubbles.Niba igipimo cyo kureremba cyibibyimba kiri munsi yicyuma cyo korohereza ibyuma, imyenge irabyara.

Inzira ya laser fusion gusudira irwanya porosity

1. Kurwanya imyenge yo gusudira mbere yo gusudira mbere yo gusudira

Ubuvuzi mbere yo gusudira nuburyo bwiza bwo kugenzura imyenge ya metallurgiki ya aluminium alloy laser weld.Uburyo bwo kuvura hejuru burashobora kugabanywamogusukura kumubiri no gusukura imitibisanzwe.

Nyuma yo kugereranya, gufata uburyo bwa chimique kugirango ukemure hejuru yikibaho cyibizamini (gusukura ibyuma bisukura - gukaraba - gukaraba alkali - gukaraba - gukaraba - gukaraba - gukama) nibyiza.Muri byo, gukaraba alkali bivanwa muburebure bwububiko bwibikoresho hamwe nigisubizo cyamazi cya 25% NaOH (sodium hydroxide), kandi gutoragura bikorwa na 20% HNO3 (acide nitric) + 2% HF (hydrogène fluoride) ) igisubizo cyamazi yo gutesha agaciro lye isigaye.Nyuma yo kuvura hejuru yicyapa cyibizamini, gusudira bikorwa mu masaha 24, kandi inteko mbere yo gusudira ikoranwa hamwe na alcool ya anhidrous mugihe isahani yikizamini yashyizweho igihe kinini nyuma yo kuvura icyapa.

2. Kubuza gusiba imyenge ukoresheje ibipimo byo gusudira

Ihinduka ryimyenda yo gusudira ntabwo rifitanye isano gusa nubwiza bwo kuvura hejuru yo gusudira, ahubwo bifitanye isano nuburyo bwo gusudira.Ingaruka yibipimo byo gusudira ku byobo byo gusudira bigaragarira cyane cyane mu kwinjirira kwa weld, ni ukuvuga ingaruka z'ubugari bw'inyuma bw'inyuma ya weld kuri pore.

Naikizaminidushobora kubimenyabirashobora kugaragara ko mugihe ubugari bwinyuma bwubugari bwa R ari> 0,6, gukwirakwiza kwibanda kumurongo wurunigi muri weld birashobora kunozwa neza.Kandi iyo ubugari bwinyuma bwikigereranyo R ari> 0.8, kubaho kwimyuka yo mu kirere muri weld birashobora kunozwa neza.Ikirenzeho, ibisigisigi bya pore muri weld birashobora kuvaho cyane.

3. Kubuza imyenge yo gusudira uhitamo neza gazi ikingira nigipimo cy umuvuduko

Guhitamo gaze ikingira bigira ingaruka kumiterere, gukora neza nigiciro cyo gusudira muburyo butaziguye.Mugihe cyo gusudira lazeri, guhumeka neza gaze irinda birashobora kugabanya imyenge yo gusudira neza.

Nkuko bigaragara ku gishushanyo kiri hejuru, Ar (argon) na He (helium) bikoreshwa mukurinda ubuso bwa weld.Mubikorwa bya aluminium alloy laser gusudira, Ar na Afite impamyabumenyi zitandukanye za ionisation ya laser bivamo gusudira gutandukanye.Birashobora kugaragara ko ububobere bwa weld bwabonetse ukoresheje Ar nka gaze ikingira iri munsi yuwasudira mugihe yatoranijwe nka gaze ikingira.

Mugihe kimwe, dukwiye kandi kwitondera ko gazi itemba ari nto cyane (<10L / min) numubare munini wa plasmasbyakozwe no gusudira ntibishobora gutwarwa,izakorapisine yo gusudira idahindagurika kandi amahirwe yo gushingwa kwiyongera.Niba igipimo cya gaze giciriritse (hafi 15L / min) plasma igenzurwa neza kandi gaze irinda igira ingaruka nziza yo kurwanya okiside kumashanyarazi.pisine,bizabyara byibuze.Gazi ikabije iherekezwa numuvuduko ukabije wa gaze, kuburyo igice cya gaze irinda kivangwa imbere muri tank, bigatuma ububobere buzamuka.

Biterwa nimikorere yibikoresho ubwabyo, nintishoborairinde rwose ko gusudira utabyayeporositymuri gahunda yo gusudira.Icyo ishobora kugeraho nigabanya ubukanaigipimo.