labarai

Me yasa stomata ke bayyana?

1.1 Cikin rami mai waldadin Laser yana cikin yanayin girgiza mara ƙarfi, kuma kwararar ramin da narkakken tafkin yana da ƙarfi sosai.Turin karfen dake cikin ramin yana fita waje ya kai gatururi vortexda aka kafa a buɗaɗɗen ramin, wanda ke jujjuya iskar gas mai kariya (Ar) zuwa kasan ramin, kuma tare daramin yana matsawa gaba, waɗannan iskar gas masu kariya za su shiga cikin narkakkar tafki a cikin nau'in kumfa.Saboda ƙarancin solubility na Ar da saurin sanyi na waldawar Laser, ana barin kumfa a cikin kabu kafin su iya tserewa.don samar da stomata.Menene ƙari, ya kasancelalacewa ta hanyarrashin kyawun kariya a lokacin aikin walda wanda nitrogen ke mamaye tafkin narkakkar daga waje, da kuma narkewar sinadarin nitrogen a cikin baƙin ƙarfe na ruwa ya sha bamban da narkewar nitrogen a cikin ƙarfe mai ƙarfi.Don haka inda sanyaya da ƙarfafa karfe, da solubility na nitrogen rage tare da rage yawan zafin jiki a lokacin da narkakkar pool karfe ne sanyaya zuwa farkon crystallization iya haifar da wani babban kwatsam rage a solubility.A wannan lokacin babban adadin iskar gas zai yisamar da kumfa.Idan yawan iyo na kumfa ya kasance ƙasa da ƙimar crystallization na ƙarfe, ana haifar da pores.

Hanyar waldi na Laser yana hana porosity

1. Danne walda pores ta pre-welding surface jiyya

Pre-welding surface jiyya ne mai tasiri hanya don sarrafa karfe pores na aluminum gami Laser welds.Ana iya raba hanyoyin maganin saman zuwatsabtace inji na jiki da tsabtace sinadaraiyawanci.

Bayan kwatancen, ɗaukar hanyar sinadarai don magance saman allon gwajin (tsaftacewar ƙarfe mai tsabta - wankewa - wanke alkali - wanka - wanka - wanke - bushewa) shine mafi kyau.Daga cikin su, an cire alkali wankin daga saman kauri daga cikin kayan tare da wani ruwa bayani na 25% NaOH (sodium hydroxide), da pickling da za'ayi tare da 20% HNO3 (nitric acid) + 2% HF (hydrogen fluoride). ) Magani mai ruwa don neutralize ragowar lye.Bayan da surface jiyya na gwajin farantin da waldi ne da za'ayi a cikin sa'o'i 24, da kuma taro kafin waldi da aka harhada goge da anhydrous barasa a lokacin da gwajin farantin da aka sanya na dogon lokaci bayan gwajin farantin jiyya.

2. Hana pores waldi ta hanyar walda tsarin sigogi

Samuwar weld porosity ba kawai alaka da ingancin weldment surface jiyya, amma kuma alaka waldi tsari sigogi.Tasirin sigogi na walda a kan pores na weld yafi nunawa a cikin shigar da weld, wato, tasirin rabo na nisa na baya na weld akan pores.

Bygwajiza mu iya sanin hakanana iya ganin cewa lokacin da rabo mai nisa na baya R shine> 0.6, za a iya inganta yawan rarraba sarkar pores a cikin weld yadda ya kamata..Kuma lokacin da nisa na baya R shine> 0.8, ana iya inganta kasancewar pores na yanayi a cikin weld yadda ya kamata.Menene ƙari, ragowar pores a cikin walda za a iya kawar da su zuwa babban matsayi.

3. Hana ramukan walda ta hanyar zabar gas ɗin garkuwa daidai da ƙimar kwarara

Zaɓin iskar gas mai kariya yana rinjayar inganci, inganci da farashin walda kai tsaye.A cikin aiwatar da waldawar Laser, daidaitaccen busa iskar gas mai kariya zai iya rage ramukan walda yadda ya kamata.

Kamar yadda aka nuna a cikin hoton da ke sama, ana amfani da Ar (argon) da He (helium) don kare fuskar walda.A cikin aiwatar da aluminum gami Laser waldi, Ar kuma Yana da daban-daban digiri na ionization na Laser wanda ya haifar da daban-daban weld forming.Ana iya ganin ƙurawar walda da aka samu ta hanyar amfani da Ar a matsayin iskar kariya bai kai na walda ba lokacin da aka zaɓa shi a matsayin iskar kariya.

Har ila yau, ya kamata mu mai da hankali ga gaskiyar cewa iskar gas ba ta da yawa (<10L / min) da kuma yawan adadin plasma.wanda aka samar ta hanyar walda ba za a iya busa shi ba,wanda zai yida waldi pool m da yiwuwar porosity samuwar karuwa.Idan matsakaicin matsakaicin adadin iskar gas (kimanin 15L / min) ana sarrafa plasma yadda yakamata kuma iskar mai kariya tana yin tasirin anti-oxidation mai kyau akan narkakkar.tafkin,zai haifar da mafi ƙarancin porosity.Yawan iskar iskar gas yana tare da matsananciyar iskar gas, ta yadda wani bangare na iskar gas din ya gauraya cikin cikin tankin, wanda hakan ke sa porosity ya tashi.

Ya shafa ta aikin kayan kanta, shiba zai iya bazama gaba daya kauce wa cewa waldi ba tare da samarporositya cikin aikin walda.Abin da zai iya cimma shi nerage porosityƙimar.