Yiziphi Izakhiwo Okufanele I-Thermal Spray Powder Ibe Nazo?

Ngaphezu kokuhlangabezana nezidingo zokusebenza ze-coating, iezishisayo spray powderkumele futhi ihlangabezane nezidingo zenqubo yokufafaza: ingathuthelwa ekugelezeni kwelangabi le-jet ngokulinganayo, ngokushelelayo nangokuzinza ukuze kuqinisekiswe ukunamathela okuzinzile nokufana kwe-thermal spray.Ngakho-ke, izici eziyisisekelo ze-powder ezifana nokuma, usayizi wezinhlayiyana kanye nokusabalalisa usayizi wezinhlayiyana, ukuminyana ngobuningi, i-fluidity kanye nekhwalithi yobuso, yizici ezibalulekile zokusebenza kwe-thermal spray powder.

(1) I-morphology yezinhlayiya zempushana

Izinto eziningi ezishisayo zokufafaza ingxubevange ye-powder zilungiswa ngendlela ye-atomization, futhi i-powder particle morphology ibhekisela ekubunjweni kwejiyomethri nezici zangaphezulu zezinhlayiya zempushana.I-geometry ingahlolwa ngokulinganisa isilinganiso se-eksisi emfushane ku-eksisi ende (inani lezibalo) lezinhlayiya eziyindilinga eziyindilinga.Uma iphezulu idigri ye-spheroidization, iba ngcono i-solid-state fluidity yempushana.Njengoba izinga le-powder spheroidization alihlobene kuphela nendlela yokugaya i-atomization powder kanye nemingcele yenqubo yokugaya i-atomization, kodwa futhi nokwakheka kwamakhemikhali empushana ngokwayo.Ngakho-ke, i-spheroidization degree yezinhlobo ezahlukene zezimpushana nayo ihlukile, kodwa kufanele kuqinisekiswe ukuthi inqubo yokufafaza ingaba bushelelezi ngisho nokudla okuyimpuphu.

Ngezinye izikhathi kunezimbobo ezinobukhulu obuhlukahlukene ngaphakathi kwezinhlayiya ze-powder metal ezishisayo ezilungiselelwe i-atomization, ezinye zazo zingena phezulu, kanti ezinye zivaliwe ngaphakathi kwezinhlayiya.Uma inqubo yokufafaza ingalungile, izoba nomthelela oqondile kwikhwalithi yokugqoka.Ukubona izimbobo ezinjalo, i-optical metallographic microscope ngokuvamile isetshenziswa.Izici ezingaphezulu zibhekisela kumbala ongaphezulu, ukushelela, njll.

(2) Usayizi wezinhlayiya zempushana

Ukukhethwa kosayizi wezinhlayiyana zempushana kanye nobubanzi bayo kunqunywa ngokuyinhloko indlela yenqubo yokufafaza kanye nemingcele yokucaciswa kwenqubo yokufafaza.Ngisho noma ububanzi bezinhlayiyana zempushana bufana, ingxenye yokwakheka kwebanga lezinhlayiyana ayifani ngempela.Isibonelo: nakuba usayizi wezinhlayiyana zempushana usebangeni lika-125μm ~ 50μm (-120mesh~+320mesh), ingxenye yezimpushana zamabanga amathathu ahlukene kasayizi wezinhlayiyana 100μm ~ 125μm, 80μm ~ 100μm, 50μm ~ 80μm ayifani. .Ububanzi bezinhlayiyana zempushana kanye nokwakheka kwebanga lezinhlayiyana zabo kunomthelela oqondile kwikhwalithi yokumboza, ukuminyana kwenqwaba yempushana kanye noketshezi.

(3) I-Bulk Density of Powder

Ukuminyana kwenqwaba yempushana kubhekisela esilinganisweni somthamo weyunithi ngayinye yempushana lapho ipakishwe ngokukhululeka.Njengoba ukuminyana kwenqwaba yempushana kuhlobene nezinga le-spheroidization lempushana, ubukhulu nobuningi bemigodi ngaphakathi kwezinhlayiya zempushana, kanye nokwakheka kosayizi wezinhlayiyana zempushana, kuphinde kuthinte ikhwalithi yesifutho sokufutha.

(4) Uketshezi lwempushana

I-fluidity yempushana yisikhathi esidingekayo ukuze inani elithile lempushana ligeleze ngokukhululekile kufaneli evamile enembobo ethile.Ngokuvamile kubonakala ngesikhathi (s) esidingekayo ukuze u-50g powder ugeleze kufaneli evamile enobubanzi obungu-2.5mm.Inomthelela othize enqubweni yokufafaza nokusebenza kahle kwesifutho.

I-Chengdu Huarui Industrial Co., Ltd. 

Email: sales.sup1@cdhrmetal.com 

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