Fasahar Welding Carbide, Tsari, da Aikace-aikacen Masana'antu

Carbide da aka yi da siminti, sanannen taurin sa na musamman (har zuwa 90 HRC) da juriya, an haɗa shi da yawa cikin kayan aikin yankan, rago ma'adinai, da ingantattun abubuwan da aka gyara ta hanyar walda. Duk da haka, babban gaggautinta da rashin daidaituwar haɓakar haɓakar haɓakar thermal (TEC) tare da abubuwan ƙarfe (4-7 × 10⁻⁶/°C vs. 11–13 × 10⁻⁶/°C) suna haifar da ƙalubale na walda na musamman. Wannan labarin ya ba da cikakken bayani game da manyan fasahohin walda, sarrafa tsari mai mahimmanci, da aikace-aikacen ainihin duniya don kayan carbide.

1. Mahimman fasahar walda don Carbide

Hanyoyi guda biyu sun yi nasara a cikin haɗin gwiwar masana'antu: brazing (na al'ada duk da haka abin dogara) da walƙiya na laser (ci-gaba madaidaicin bayani). An kwatanta ainihin halayensu a ƙasa:

▶ Brazing: Dokin Aiki na Kera Kayan Aikin Carbide

Brazing yana samun haɗin kai ta hanyar narkewar ƙarfe mai filler (ƙananan narkewa fiye da carbide/karfe) zuwa jika da cike gibin haɗin gwiwa, ba tare da narkar da kayan tushe ba. Ita ce fasaha ta farko don kayan aikin carbide saboda ƙimar farashi da dacewa tare da samar da taro.

Mabuɗin Ka'idoji & Zaɓin Filler

Kayan aikin haɗin gwiwa: Molten filler ƙarfe yana shiga cikin ƙananan ramuka ta hanyar aikin capillary, ƙirƙirar haɗin ƙarfe tare da carbide (WC-Co) da abubuwan ƙarfe ta hanyar yaduwar abubuwa (misali, Cr a cikin filler yana amsawa da C a cikin carbide don samar da Cr₃C₂).

Gilashin Filla:

Ni-Cr-Based: An fi so don aikace-aikacen zafin jiki (misali, kayan aikin milling), narke a 1050-1150 ° C, kuma yana ba da kyakkyawan juriya na iskar shaka.

Ag-Cu-Based: An yi amfani da shi don kayan aikin ƙarancin damuwa (misali, abubuwan saka lathe), narke a 650-800 ° C, yana rage haɗarin girgiza zafi.

Cu-Based: Zaɓin tattalin arziki don kayan aikin yankan gaba ɗaya, yana buƙatar juzu'i don cire fina-finai oxide.

▶ Laser Welding: Daidaitaccen Haɗuwa don Manyan Ayyuka

Waldawar Laser yana amfani da katako mai mahimmanci (1.06μm fiber Laser wanda aka fi so) don ƙirƙirar wuraren tafki na narkakku, yana ba da ƙarfi mai ƙarfi, haɗin gwiwa mara ƙarfi. Yana da manufa don ƙananan kayan aiki da hadaddun geometries.

Fa'idodin Fasaha Akan Brazing

Karamin Tasirin Thermal: Yankin da ke fama da zafi (HAZ)

Sarrafa sauri: Saurin walda har zuwa 50mm/s don abubuwan saka carbide, 3x sauri fiye da brazing induction.

Zabin Filler-Free: Fusion kai tsaye don abubuwan haɗin carbide na bakin ciki (misali, ƙananan haƙora).

2. Babban Kalubale & Dabarun Ragewa

Rashin yin walda na Carbide da farko ya samo asali ne daga saura damuwa da rashin jika. 

Maganganun da aka yi niyya suna da mahimmanci:

▶ Ragowar Damuwa & Fashewa

Tushen Tushen: Rashin daidaituwa na TEC yana haifar da bambance-bambancen raɗaɗi na thermal yayin sanyaya, haifar da damuwa mai ƙarfi a cikin carbide.

Magani:

Yi amfani da yadudduka na buffer matsakaici (misali, Ni-Cu alloy) don ɗaukar damuwa.

Ɗauki dumama/sanyi ta hanyar mataki-mataki (yawan hawan ≤10°C/s) induction brazing.

Bayan-weld zafin jiki a 250 ° C na 2 hours don rage damuwa da 30-50%.

▶ Rashin Ruwan Ruwa

Tushen Tushen: Babban ƙarfin saman Carbide yana tsayayya da kutsawa cikin ƙarfe.

Magani:

Kafin a yi maganin carbide tare da Cr foda don samar da Layer bonding Cr₃C₂.

Yi amfani da juzu'i masu aiki (misali, tushen borax) don cire fina-finai na oxide akan abubuwan ƙarfe.

▶ Ciwon Karfe

Tushen Tushen: Dumama mai yawa yana narkar da abin da ake kira carbide's Co, yana raunana haɗin gwiwa.

Magani:

Iyakance lokacin walda zuwa

Sarrafa lokacin bugun bugun Laser (2-5ms) don gujewa ɗaukar tsayin daka.

3. Aikace-aikacen Masana'antu & Nazarin Harka

Welding na Carbide yana ba da damar manyan ayyuka a cikin sassa:

▶ Kera Kayan Aikin Yanke

Kayan Aikin CNC: Induction brazing na WC-Co sakawas zuwa shanks na karfe ta amfani da Ni-Cr-B-Si filler (1080 ° C, 45s) ya cimma ƙarfin haɗin gwiwa na 200MPa - yana jure nauyin injin 5000rpm.

Madauwari Saw Blades: Automated Laser waldi (300W fiber Laser) na carbide hakora zuwa karfe fayafai yana rage karyewar hakori da 60% vs. brazing.

▶ Ma'adinai & Gine-gine

Rage Hakowa Rock: Vacuum brazing na maɓallin carbide zuwa jikin ƙarfe (Ni-Cr filler, 1120°C) yana tabbatar da juriya ga nauyin tasirin 50MPa; rayuwar sabis ya tsawaita da 2-3x.

▶ Daidaitaccen Injiniya

Micro-Machining Tools: Fiber Laser waldi na 0.8mm carbide tukwici zuwa bakin karfe shafts (250W, 15mm / s) kula ± 0.01mm girma daidaito ga semiconductor wafer yankan.

4. Yanayin Gaba

Welding Hybrid: Haɗa zafin zafin laser tare da induction brazing don rage fashewar carbide a cikin haɗin gwiwa mai kauri.

Haɓaka Filler Mai Aiki: Ni-Cr-Ti filler waɗanda ke samar da haɗin gwiwar TiC mai ƙarfi tare da carbide, haɓaka ƙarfin haɗin gwiwa da kashi 30%.

Haɗin kai ta atomatik: Tsarin AI-kore tare da sa ido na yanayin zafi na ainihin lokaci don haɓaka sigogin walda don madaidaicin maki carbide.

Kammalawa

Carbide waldi yana buƙatar ma'auni na kimiyyar abu da sarrafa tsari - brazing ya ƙware a cikin samar da ingantaccen farashi mai tsada, yayin waldawar laser ta mamaye aikace-aikacen madaidaici. Ta hanyar magance saura damuwa da ƙalubalen wettability, masana'antun za su iya buɗe cikakkiyar damar carbide a cikin manyan kayan sawa, yanayin damuwa, daga injin masana'antu zuwa matsanancin ayyukan hakar ma'adinai.