Hlau sam xauv nees siab welding txheej txheem qhia
Txoj kev vuam yog ib txoj kev vuam uas cov vuam qhov txuas tau zoo thiab khaws cia nyob rau hauv ib qho kub thiab siab rau ib lub sij hawm, kom cov atoms ntawm qhov chaw sib cuag diffuse ib qho kev sib txuas. Lub ntsiab yam tseem ceeb uas cuam tshuam rau cov txheej txheem vuam diffusion thiab kev sib koom ua ke zoo yog qhov kub, siab, lub sijhawm diffusion thiab nto roughness. Qhov siab dua qhov vuam kub, qhov ceev ntawm atomic diffusion. Qhov kub ntawm qhov vuam feem ntau yog {{0}}.5 mus rau 0.8 lub sij hawm lub melting point ntawm cov khoom. Raws li cov khoom siv thiab cov kev xav tau rau qhov zoo ntawm kev sib koom ua ke, diffusion vuam tuaj yeem nqa tawm hauv lub tshuab nqus tsev, tiv thaiv roj los yog hnyav, ntawm cov tshuab nqus tsev vacuum diffusion vuam yog feem ntau siv. Txhawm rau kom ceev cov txheej txheem vuam, txo qhov yuav tsum tau ua rau qhov roughness ntawm vuam nto los yog tiv thaiv cov teeb meem hauv kev sib koom ua ke, cov khoom siv nruab nrab interlayer nrog cov muaj pes tsawg leeg feem ntau ntxiv ntawm qhov vuam qhov chaw, thiab nws cov tuab yog li 0.01 hli. . Lub diffusion vuam siab yog me me, lub workpiece tsis tsim macroscopic yas deformation, thiab nws yog haum rau precision qhov chaw uas yuav tsis ua tiav tom qab vuam. Diffusion welding tuaj yeem ua ke nrog lwm cov txheej txheem thermal los tsim cov txheej txheem sib xyaw ua ke, xws li kub poob -diffusion vuam, hmoov sintering- diffusion vuam, thiab superplastic sib sau- diffusion vuam. Cov txheej txheem sib xyaw ua ke no tuaj yeem tsis tsuas yog txhim kho cov khoom tsim tau zoo, tab sis kuj tuaj yeem daws cov teeb meem uas tsis tuaj yeem daws tau los ntawm ib txheej txheem. Piv txwv li, ntau yam titanium alloy Cheebtsam ntawm supersonic aircraft yog ua los ntawm superplastic forming -diffusion vuam. Kev sib koom ua haujlwm ntawm diffusion vuam tuaj yeem yog tib yam li cov hlau hauv paus. Nws yog tshwj xeeb tshaj yog haum rau vuam cov ntaub ntawv sib txawv ntawm cov hlau, uas tsis yog{10}} cov khoom siv hlau xws li graphite thiab ceramics, thiab dispersion ntxiv dag zog rau. high kub alloys, hlau matrix composites thiab ntxeem tau sintered cov ntaub ntawv. Diffusion vuam tau siv dav hauv kev tsim cov roj reactor, honeycomb structural panels, electrostatic acceleration tubes, ntau yam hniav, impellers, tuag, lim raj thiab cov khoom siv hluav taws xob.
Diffusion welding yog hu rau vuam qhov chaw ntawm cov khoom yuav tsum tau welded nrog ib leeg nyob rau hauv ib tug tej yam kub thiab siab, thiab nthuav lub cev kev sib cuag ntawm qhov chaw yuav tsum tau welded los ntawm microscopic yas deformation los yog los ntawm lub tiam ntawm ib tug me me npaum li cas ntawm cov kua theem. ntawm qhov chaw vuam, kom qhov kev ncua deb ntawm lawv yog (15). ) nyob rau hauv 10-8cm (nyob rau hauv txoj kev no, lub attraction ntawm atoms yuav tsim ib tug hlau daim ntawv cog lus), thiab ces tom qab ib tug ntev lub sij hawm ntawm lub sij hawm, lub atoms mus rau diffuse thiab nkag mus rau ib leeg mus cuag ib tug welding txoj kev ntawm metallurgical bonding.
Obviously, rau welding ntawm zoo tib yam hlau harnesses, tus nqi ntawm diffusion vuam yog siab dhau.
High- zaus vuam (siab- zaus vuam)
Siab- zaus vuam siv cov khoom siv hluav taws xob ua kom sov ua lub zog. Thaum lub sij hawm vuam, qhov hluav taws xob tiv thaiv tau tsim nyob rau hauv lub workpiece los ntawm qhov siab - zaus tam sim no heats txheej txheej ntawm workpiece vuam cheeb tsam mus rau ib tug molten los yog kaw yas lub xeev, thiab ces siv (los yog tsis siv) upsetting quab yuam kom ua tiav. hlau sib txuas. Yog li ntawd nws yog ib qho khoom theem tsis kam vuam txoj kev. High- zaus vuam tuaj yeem muab faib ua kev sib cuag siab- zaus vuam thiab induction siab- zaus vuam raws li txoj kev siab - zaus tam sim no ua kom sov hauv qhov chaw ua haujlwm. Hauv kev sib cuag siab- zaus vuam, siab- zaus tam sim no tau nkag mus rau hauv cov khoom ua haujlwm los ntawm kev sib cuag nrog cov khoom ua haujlwm. Thaum lub sij hawm induction siab - zaus vuam, qhov siab - zaus tam sim no tsim ib qho induced tam sim no nyob rau hauv lub workpiece los ntawm kev sib txuas ntawm induction coil sab nraum lub workpiece. High{10}} zaus vuam yog ib txoj kev vuam tshwj xeeb, thiab cov cuab yeej tshwj xeeb yuav tsum tau nruab raws li cov khoom. Kev tsim khoom siab, vuam ceev txog 30m / min. Nws yog tsuas yog siv rau vuam longitudinal seams los yog kauv seams thaum tsim cov kav dej.
Pom tseeb, siab - zaus vuam tsis haum rau cov hlua me me.
txias siab welding
Cold pressure welding, Lus Askiv yog txias siab vuam
Thaum pressurized thiab deformed, oxide zaj duab xis ntawm qhov chaw sib cuag ntawm lub workpiece raug rhuav tshem thiab extruded, uas tuaj yeem ntxuav cov welded sib koom ua ke. Qhov kev thov siab feem ntau siab dua qhov kev tawm dag zog ntawm cov khoom siv los tsim 60-90 feem pua ntawm deformation. Cov txheej txheem siab tuaj yeem ua rau qeeb extrusion, dov lossis cuam tshuam quab yuam, lossis nws tuaj yeem nias ob peb zaug kom ua tiav qhov xav tau deformation.
Vim tias qhov txias txias - xovxwm vuam yuav tsum tsis muaj cua sov thiab tsis muaj qhov muab tub lim, cov cuab yeej siv tau yooj yim; Cov txheej txheem tseem ceeb ntawm kev vuam tau txiav txim siab los ntawm qhov loj ntawm cov pwm, yog li nws yooj yim rau kev khiav lag luam thiab automate, qhov vuam zoo yog ruaj khov, cov khoom tsim tau siab, thiab tus nqi qis; tsis muaj flux, qhov sib koom ua ke yuav tsis ua rau corrosion. ; Qhov kub ntawm qhov sib koom ua ke tsis nce thaum lub sij hawm vuam, thiab lub xeev crystalline ntawm cov khoom tseem tsis hloov, uas yog tshwj xeeb tshaj yog haum rau welding ntawm dissimilar hlau thiab qee cov ntaub ntawv hlau thiab cov khoom uas tsis tuaj yeem ua tiav los ntawm thermal vuam. Txias- xovxwm vuam tau dhau los ua ib qho tseem ceeb tshaj plaws thiab txwv txoj kev vuam hauv kev lag luam hluav taws xob, cov khoom lag luam txhuas thiab qhov chaw vuam.
Cov chaw ua haujlwm ntawm cov khaub thuas- xovxwm vuam thiab lawv cov tuag tuaj yeem khaws cov khib nyiab hlau thiab yuav tsum tau muab tshem tawm tsis tu ncua. Cov cua compressed, yog tias muaj, tuaj yeem siv los tshuab cov khib nyiab. Txhawm rau tshem tawm cov khib nyiab kom tiav, tshem cov pwm tawm ntawm lub vuam, disassemble plaub modules ntawm pwm, thiab siv lub iav magnifying kom ua tib zoo tshuaj xyuas txhua qhov module kom paub meej tias tag nrho cov khoom khib nyiab ntawm qhov chaw ntawm lub module raug tshem tawm. Kev saib xyuas yuav tsum tau ua thaum tshem tawm cov pwm, tshwj xeeb tshaj yog cov kab me me tau yooj yim ploj. Qhov saum npoo ntawm cov pwm tsis huv, cov hlau yuav yooj yim plam hauv pwm thaum xaim, thiab vuam yuav ua tsis tiav. Nco ntsoov tias yuav tsum tsis muaj roj rau ntawm qhov chaw ua haujlwm ntawm pwm tom qab kho.
Cov khoom siv uas yuav tsum tau ua kom txias - nias vuam yog yooj yim, txheej txheem yog yooj yim, thiab cov kev ua haujlwm zoo. Txawm li cas los xij, lub zog extrusion xav tau rau txias- xovxwm vuam yog qhov loj, cov khoom siv kuj loj heev thaum vuam loj- ntu workpieces, thiab qhov saum npoo ntawm lub workpiece tom qab vuam vuam muaj qhov tob tob, uas txwv nws daim ntawv thov ntau yam rau ib qho twg.
Yog li ntawd, txias siab welding tsis yog ib qho kev xaiv zoo tshaj plaws rau hlau hlua vuam.
