Carbide Welding Technologies, Maitiro, uye Maindasitiri Zvikumbiro

Cemented carbide, inozivikanwa nekuoma kwayo kunoshamisa (kusvika 90 HRC) uye kuramba kupfeka, yakabatanidzwa zvakanyanya mukucheka maturusi, mabhiti emigodhi, uye zvinhu chaizvo kuburikidza newelding. Zvisinei, brittleness yaro yakakwirira uye isinganzwisisiki yekuwedzera kwekushisa kwemafuta (TEC) nesimbi substrates (4-7 × 10⁻⁶ / ° C vs. 11-13 × 10⁻⁶ / ° C) inokonzera matambudziko akasiyana-siyana. Ichi chinyorwa chinotsanangudza iyo inotungamira welding matekinoroji, yakakosha maitiro ekutonga, uye chaiyo-yepasirese mashandisirwo emidziyo yecarbide.

1. Dominant Welding Technologies yeCarbide

Nzira mbiri dziripo muindasitiri carbide kujoinha: brazing (yakajairika asi yakavimbika) uye laser welding (advanced precision solution). Hunhu hwavo hwakakosha hunofananidzwa pazasi:

▶ Brazing: Iyo Workhorse yeCarbide Tool Manufacturing

Brazing inowana chisungo nekunyungudutsa simbi yekuzadza (yakaderera kunyungudika pane carbide / simbi) kunyorova uye kuzadza mapeji emajoini, pasina kunyungudutsa zvigadziko. Ndiyo nzira yekutanga yezvishandiso zvecarbide nekuda kwekuita kwayo mutengo uye kuenderana nekugadzirwa kwakawanda.

Makiyi Nheyo & Sarudzo Yekuzadza

Bonding Mechanism: Yakanyungudutswa yekuzadza simbi inopinda ma micro-gaps kuburikidza necapillary chiito, ichigadzira metallurgical bond ne carbide (WC-Co) uye simbi substrates kuburikidza ne element diffusion (semuenzaniso, Cr in filler inopindirana neC mu carbide kuita Cr₃C₂).

Filler Alloys:

Ni-Cr-Yakavakirwa: Inofarirwa kwepamusoro-tembiricha yekushandisa (semuenzaniso, maturusi ekugaya), inonyungudika pa1050-1150 ° C, uye inopa yakanakisa oxidation kuramba.

Ag-Cu-Yakavakirwa: Inoshandiswa kune yakaderera-stress zvishandiso (somuenzaniso, lathe insert), inonyunguduka pa 650-800 ° C, inoderedza kupisa kunotyisa.

Cu-Yakavakirwa: Sarudzo yehupfumi yezvina-chinangwa zvekucheka maturusi, inoda flux kubvisa oxide mafirimu.

▶ Laser Welding: Precision Kujoinha kune Yepamusoro-Kuita Zvishandiso

Laser welding inoshandisa danda rakatariswa (1.06μm fiber laser inosarudzwa) kugadzira madziva akanyungudutswa emunharaunda, achigonesa kusimba kwepamusoro, kuderera-kukanganisa majoini. Yakanakira micro-zvishandiso uye yakaoma geometries.

Technical Advantages Pamusoro peBrazing

Minimal Thermal Impact: Kupisa-kukanganisa nzvimbo (HAZ)

Rapid Processing: Welding inomhanyisa kusvika 50mm/s yekuisa carbide, 3x nekukurumidza kupfuura induction brazing.

Filler-Yemahara Sarudzo: Yakananga fusion yeatete-walled carbide components (e.g., micro-drills).

2. Matambudziko Anokosha & Mitigation Strategies

Carbide welding kutadza kunokonzerwa nekusarira kunetseka uye kusanyorova kwemvura. 

Mhinduro dzakanangwa dzinokosha:

▶ Residual Stress & Cracking

Root Chikonzero: TEC kusawirirana kunokonzera kupisa kwekupisa misiyano panguva yekutonhodza, zvichiita kuti tinyanye kushushikana mucarbide.

Mhinduro:

Shandisa yepakati buffer layer (semuenzaniso, Ni-Cu alloy) kutora kushushikana.

Gamuchira kudziyisa/kutonhodza zvishoma nezvishoma (ramp rate ≤10°C/s) mukugadzira bhurosi.

Post-weld tempering pa250°C kwemaawa maviri kuti ibvise kushushikana ne30–50%.

▶ Kusanyorova

Root Chikonzero: Carbide yakakwira pamusoro pesimba inopokana nekuzadza simbi kupinza.

Mhinduro:

Pre-treat carbide neCr poda kugadzira Cr₃C₂ bonding layer.

Shandisa mashizha anoshanda (semuenzaniso, borax-based) kubvisa mafirimu eoxide pane substrates dzesimbi.

▶ Filler Metal Erosion

Chikonzero Chinokonzera: Kupisa kwakanyanya kunonyungudutsa carbide's Co binder, zvichiita kuti mubatanidzwa upere simba.

Mhinduro:

Deredza nguva yewelding kusvika

Dzora laser pulse duration (2-5ms) kudzivirira kuratidzwa kwenguva refu.

3. Industrial Applications & Case Studies

Carbide welding inogonesa maturusi epamusoro-soro muzvikamu:

▶ Kucheka Zvishandiso Manufacturing

CNC Tool Insets: Induction brazing yeWC-Co isas kune mashangi esimbi uchishandisa Ni-Cr-B-Si filler (1080 ° C, 45s) inowana 200MPa kusimba kwekubatana-kumiririra 5000rpm machining mitoro.

Circular Saw Blades: Automated laser welding (300W fiber laser) ye carbide mazino kuma discs esimbi inoderedza kuvhunika kwezino ne 60% vs. brazing.

▶ Kuchera & Kuvaka

Rock Drilling Bits: Vacuum brazing yemabhatani ecarbide kumiviri yesimbi (Ni-Cr filler, 1120 ° C) inovimbisa kuramba kune 50MPa kukanganisa mitoro; hupenyu hwesevhisi hwakawedzerwa ne2-3x.

▶ Precision Engineering

Micro-Machining Zvishandiso: Fiber laser welding ye0.8mm carbide matipi kune Stainless simbi shafts (250W, 15mm/s) inochengetedza ± 0.01mm dimensional kurongeka kwekucheka semiconductor wafer.

4. Future Trends

Hybrid Welding: Kubatanidza laser pre-heating ne induction brazing kuderedza carbide kuputika mumakobvu-chikamu majoini.

Active Filler Development: Ni-Cr-Ti mafirita anoumba akasimba eTiC mabhondi ane carbide, achivandudza kusimba kwemajoini ne30%.

Automation Integration: AI-inotyairwa masisitimu ane chaiyo-nguva yekupisa yekutarisisa kukwidziridza welding paramita kune akasiyana carbide mamakisi.

Mhedziso

Carbide welding inoda chiyero chesainzi yezvinhu uye process control-brazing inokunda mukudhura-inoshanda kugadzirwa kwemazhinji, nepo laser welding inotonga chaiyo-yakakosha maapplication. Nekugadzirisa kusara kwekushushikana uye matambudziko ekunyorova, vagadziri vanogona kuvhura kugona kwecarbide munzvimbo dzakakwirira-dzakapfeka, dzakanyanya kushushikana, kubva mukugadzira maindasitiri kusvika kune yakanyanyisa migodhi mashandiro.