ozi

Gịnị kpatara stomata ji apụta?

1.1 N'ime oghere laser welded dị n'ọnọdụ ịma jijiji na-akwụghị ọtọ, na ntinye nke oghere na ọdọ mmiri a wụrụ awụ na-esiwanye ike.Uzuoku ígwè dị n'ime oghere ahụ na-apụ apụ ma na-edugauzuoku vortexkpụrụ na oghere nke oghere, nke na-apụta na-echebe gas (Ar) n'ime ala nke oghere, na naoghere na-aga n'ihu, gas ndị a na-echebe ga-abanye n'ọdọ mmiri a wụrụ awụ n'ụdị egosipụta.N'ihi solubility dị oke ala nke Ar na ngwa ngwa jụrụ oyi nke ịgbado ọkụ laser, a na-ahapụ egosipụta n'okirikiri weld tupu ha enwee ike ịgbapụ.na-etolite stomata.Kedu ihe ọzọ, ọ bụkpatara yanchebe na-adịghị mma n'oge usoro ịgbado ọkụ nke nitrogen na-awakpo ọdọ mmiri a wụrụ awụ site n'èzí, na solubility nke nitrogen na mmiri mmiri ígwè dị nnọọ iche na solubility nke nitrogen na ígwè siri ike.Ya mere nana jụrụ na solidification nke metal, solubility nke nitrogen na-ebelata na mbelata nke okpomọkụ mgbe a wụrụ awụ metal metal mma na mmalite nke crystallization nwere ike iduga a nnukwu mberede ibelata na solubility.N'oge a, a ga-enweta nnukwu gas na-ekpo ọkụụdị afụ.Ọ bụrụ na ọnụ ọgụgụ na-ese n'elu mmiri nke egosipụta na-erughị ogo kristal metal, a na-emepụta pores.

Ụzọ nke ịgbado ọkụ laser na-ebelata porosity

1. Kpochapụ pores ịgbado ọkụ site tupu ịgbado ọkụ n'elu ọgwụgwọ

Ngwọta elu igwe tupu ịgbado ọkụ bụ ụzọ dị irè iji chịkwaa pores ọla nke aluminum alloy laser welds.Enwere ike kewaa ụzọ ọgwụgwọ elun'ibu ihicha na chemical ihichana-emekarị.

Mgbe e jiri ya tụnyere, ị na-ewere usoro kemịkalụ iji mee ihe n'elu ụlọ nyocha (ihe nhicha ígwè - ịsacha - ịsacha alkali - ịsacha - ịsacha - ịsacha - ihicha) kacha mma.N'ime ha, a na-ewepụ ihe mkpuchi alkali site na ọkpụrụkpụ nke ihe ahụ na ngwọta mmiri nke 25% NaOH (sodium hydroxide), a na-eme pickling na 20% HNO3 (nitric acid) + 2% HF (hydrogen fluoride). ) aqueous ngwọta neutralize mpụta lye.Mgbe ọgwụgwọ elu nke efere ule ahụ gasịrị, a na-eme ịgbado ọkụ n'ime awa 24, na mgbakọ tupu ịgbado ọkụ na-ekpokọta na-ehichapụ ya na mmanya na-egbu egbu mgbe etinyere efere ule ahụ ogologo oge mgbe ọgwụgwọ efere ule gasịrị.

2. Inhibit ịgbado ọkụ pores site ịgbado ọkụ usoro parameters

The guzobe weld porosity bụghị nanị metụtara àgwà weldment elu ọgwụgwọ, ma metụtara ịgbado ọkụ usoro parameters.Mmetụta nke ịgbado ọkụ parameters na pores nke weld bụ tumadi na-egosipụta na penetration nke weld, ya bụ, mmetụta nke azụ obosara ruru nke weld na pores.

Site nauleanyị nwere ike ịma nke ahụEnwere ike ịhụ na mgbe weld azụ obosara ruru R bụ> 0.6, enwere ike imeziwanye nkesa nke yinye pores na weld nke ọma..Ma mgbe obosara obosara R bụ> 0.8, ịdị adị nke ikuku ikuku na weld nwere ike imeziwanye nke ọma.Ihe ọzọ bụ, ihe fọdụrụ nke pores na weld nwere ike ikpochapụ ruo n'ókè dị ukwuu.

3. gbochie pores ịgbado ọkụ site n'ịhọrọ nke ọma gas na-echebe na ọnụego eruba

Nhọrọ nke gas nchebe na-emetụta àgwà, arụmọrụ na ọnụ ahịa ịgbado ọkụ ozugbo.N'ime usoro ịgbado ọkụ laser, ịfụ nke ọma nke gas nchebe nwere ike ibelata pores weld nke ọma.

Dị ka e gosiri na ọnụ ọgụgụ dị n'elu, Ar (argon) na He (helium) na-eji echebe elu nke weld.Na usoro nke aluminum alloy laser ịgbado ọkụ, Ar na O nwere dị iche iche degrees nke ionization nke laser nke na-akpata dị iche iche weld akpụ.Enwere ike ịhụ na porosity nke weld enwetara site na iji Ar dị ka gas na-echebe bụ ihe na-erughị nke weld mgbe ahọpụtara ya dị ka gas mkpuchi.

N'otu oge ahụ, anyị kwesịkwara ịṅa ntị n'eziokwu na ikuku gas dị ntakịrị (<10L / min) na ọnụ ọgụgụ dị ukwuu nke plasma.enweghị ike ịfụpụ site na ịgbado ọkụ,nke ga-emeọdọ mmiri ịgbado ọkụ na-ejighị n'aka na ihe gbasara nke puru omume nke nhazi porosity na-abawanye.Ọ bụrụ na a na-achịkwa plasma na-agafe agafe ọnụego gas na-agafeghị oke (ihe dị ka 15L / min) nke ọma na gas nchebe na-arụ ọrụ dị mma na-egbochi oxidation na mgbaze.ọdọ mmiri,ọ ga-emepụta porosity kacha nta.Oke ikuku gas na-esonyere oke ikuku gas, nke mere na akụkụ nke gas nchebe na-ejikọta n'ime tank, nke na-eme ka porosity na-ebili.

Na-emetụta arụmọrụ nke ihe n'onwe ya, ọenweghị ikena-kpam kpam zere na ịgbado ọkụ na-enweghị ha naporosityna usoro ịgbado ọkụ.Ihe ọ nwere ike nweta bụbelata porosityọnụego.