Mene ne Thermal Spraying

Thermal spray rukuni ne na matakai na shafa wanda ake fesa kayan da aka narke (ko masu zafi) akan wani wuri da aka shirya. Kayan shafawa ko ''stockstock'' ana dumama su ta hanyar lantarki (plasma ko baka) ko sinadarai (harshen konewa). Rubutun feshin thermal na iya zama lokacin farin ciki (kewan kauri daga 20 micrometers zuwa mm da yawa).

Thermal Spray Rufe kayan don zafin zafi sun haɗa da karafa, gami, yumbu, robobi, da abubuwan haɗin gwiwa. Ana ciyar da su a cikin foda ko nau'in waya, mai zafi zuwa wani narkakkar ko narkar da ƙasa, kuma a hanzarta zuwa ga ma'auni a cikin nau'i na nau'i mai girman micrometer. Ana amfani da konewa ko fitarwar baka na lantarki azaman tushen kuzari don feshin zafi. Abubuwan da ke haifar da sutura ana yin su ta hanyar tarin ƙwayoyin da aka fesa da yawa. Filaye bazai yi zafi sosai ba, yana barin suturar abubuwa masu ƙonewa.

Thermal Spray Coating ingancin yawanci ana kimanta ta auna porosity, oxide abun ciki, macro da micro-taurin, bond ƙarfi, da kuma surface roughness. Gabaɗaya, ingancin shafi yana ƙaruwa tare da ƙara saurin barbashi.

Nau'in feshin thermal:

1. Plasma spray (APS)

2. Bindigan Fashewa

3. Waya baka fesa

4. Fasa wuta

5. Man iskar oxygen mai ƙarfi (HVOF)

6. Man fetur mai saurin gudu (HVAF)

7. Sanyi fesa

Aikace-aikace na Thermal Spraying

Ana amfani da suturar zafi mai zafi a masana'antar injin turbin gas, injin dizal, bearings, mujallu, famfo, compressors, da kayan aikin filin mai, da kuma a cikin sanya kayan aikin likita.

Fasa zafin zafi shine babban madadin labulen baka mai walda, kodayake kuma ana amfani dashi azaman madadin sauran hanyoyin hawan igiyar ruwa, kamar su electroplating, jigon tururi na jiki da sinadarai, da sanya ion don aikace-aikacen injiniya.

Amfanin Fesa Zazzabi

1. M zabi na shafi kayan: karafa, gami, tukwane, cermets, carbides, polymers, da kuma robobi;

2. Za'a iya amfani da sutura masu kauri a babban adadin ajiya;

3. Thermal fesa coatings ne mechanically bonded zuwa substrate - iya sau da yawa fesa shafi kayan da suke metallurgically m tare da substrate;

4. Za a iya fesa kayan shafa tare da mafi girma na narkewa fiye da substrate;

5. Yawancin sassa za a iya fesa tare da kadan ko babu preheat ko maganin zafi bayan zafi, kuma ɓarnawar sassan ba ta da yawa;

6. Za'a iya sake gina sassa da sauri kuma a farashi mai sauƙi, kuma yawanci a cikin ƙananan farashin canji;

7. Ta hanyar amfani da kayan ƙima don murfin fesa thermal, za a iya tsawaita rayuwar sabbin abubuwa;

8. Ana iya amfani da suturar feshin thermal duka da hannu da injina.