1. Weldability ntawm Pure Copper: Ua tau tab sis yuav tsum muaj cov txheej txheem tsim nyog
Ntshiab tooj liab feem ntau suav hais tias muaj qhov zoo weldability, tab sis nws tsis yooj yim rau vuam li carbon steel, thiab nws cov txheej txheem vuam muaj qee yam tshwj xeeb uas yuav tsum tau them sai sai rau. Lub laj thawj tseem ceeb cuam tshuam rau kev sib txuas ntawm cov tooj liab ntshiab nyob hauv nws lub cev muaj zog: ua ntej, cov tooj liab ntshiab muaj cov thermal conductivity siab, uas yog kwv yees li 5 npaug ntawm cov hlau. Thaum lub sij hawm vuam txheej txheem, cov cua sov uas tsim los ntawm vuam arc yuav ua sai sai rau lub hauv paus hlau, uas ua rau ib tug loj tshav kub- cuam tshuam cheeb tsam, nyuaj rau tsim ib tug ruaj khov molten pas dej ua ke, thiab yooj yim tshwm sim ntawm qhov tsis xws luag xws li tsis tiav fusion thiab incomplete penetration yog hais tias lub vuam tsis zoo tswj.
Thib ob, cov tooj liab ntshiab muaj qhov sib npaug ntawm cov kab sib txuas siab thiab shrinkage tus nqi. Tom qab welding, loj vuam kev nyuaj siab thiab deformation yuav tshwm sim, uas tej zaum yuav ua rau tawg nyob rau hauv lub vuam los yog puag hlau. Tsis tas li ntawd, thaum cov tooj liab ntshiab yog rhuab mus rau qhov kub siab (siab tshaj 300 degree), nws yuav yooj yim oxidize nrog oxygen nyob rau hauv cov huab cua los ua tooj liab oxide (CuO thiab Cu₂O), uas muaj siab brittleness thiab yuav txo tau lub zog thiab toughness ntawm vuam, ua rau vuam tsis xws luag xws li slag suav.
Txawm li cas los xij, nrog rau kev xaiv cov txheej txheem vuam tsim nyog thiab cov kev txwv, cov tooj liab ntshiab tuaj yeem welded zoo. Cov txheej txheem vuam siv rau cov tooj liab ntshiab muaj xws li roj tungsten arc vuam (TIG), roj hlau arc vuam (MIG), brazing thiab tsis kam vuam. Ntawm lawv, TIG welding yog txoj kev siv dav tshaj plaws rau kev siv cov tooj liab dawb huv, uas tuaj yeem tswj tau lub pas dej molten, txo oxidation, thiab tau txais kev zoo siab - welds. Ua ntej vuam, nws yog ib qho tsim nyog yuav tsum tau ua kom huv si ntawm qhov chaw ua haujlwm kom tshem tawm cov oxides, cov roj stains thiab lwm yam impurities, thiab preheat lub workpiece kom tsim nyog (feem ntau yog 150-300 degree) kom txo qhov kub qhov sib txawv thiab vuam kev nyuaj siab, yog li txhim kho qhov vuam zoo. Feem ntau, ntshiab tooj liab yog ib qho yooj yim rau weld nyob rau hauv lub premise ntawm mastering kom zoo cov txheej txheem thiab cov txheej txheem.
2. Bendability ntawm Pure Copper: Zoo heev Ductility xyuas kom yooj yim khoov
Ntshiab tooj liab muaj zoo heev ductility thiab toughness, uas txiav txim siab tias nws yooj yim heev rau khoov. Ductility yog hais txog lub peev xwm ntawm cov khoom siv los ua cov yas deformation yam tsis tau tawg nyob rau hauv qhov kev txiav txim ntawm sab nraud quab yuam, thiab ntshiab tooj liab ductility yog cov saum toj kawg nkaus hauv cov ntaub ntawv hlau. Nws qhov elongation tom qab tawg tuaj yeem ncav cuag ntau dua 30%, thiab nws muaj peev xwm ua tau zoo ntawm cov yas deformation txawm nyob hauv chav tsev kub, uas tuaj yeem khoov rau hauv ntau yam duab raws li qhov xav tau tiag tiag yam tsis muaj kev tawg lossis tawg.
Thaum khoov tooj liab ntshiab, yuav luag tsis muaj kev txwv nruj ntawm cov khoom siv khoov thiab txheej txheem. Nws tuaj yeem khoov tau manually nrog cov cuab yeej yooj yim xws li pliers thiab khoov tshuab, lossis nrog cov khoom siv khoov rau kev loj - teev ntau lawm. Lub vojvoog dabtsi yog khoov ntawm cov tooj liab ntshiab yog qhov me me, thiab txawm tias me me -voj dabtsi yog khoov tuaj yeem ua tiav yam tsis muaj kev puas tsuaj rau cov khoom. Piv txwv li, hauv kev tsim cov kav dej tooj liab, cov xov tooj hlau thiab cov ntawv tooj liab, cov tooj liab ntshiab tuaj yeem khoov tau yooj yim rau hauv U-cov duab, L- cov duab thiab lwm cov qauv tsim kom tau raws li kev teeb tsa thiab kev siv cov khoom sib txawv.
Nws yuav tsum raug sau tseg tias txawm hais tias cov tooj liab ntshiab yog ib qho yooj yim rau khoov, kev khoov ntau dhau los yog rov kho dua tuaj yeem ua rau cov khoom siv tawv tawv. Kev ua haujlwm nyuaj yuav ua rau cov khoom siv hauv zos nyuaj thiab nkig, uas yuav ua rau tawg thaum khoov dua. Nyob rau hauv rooj plaub no, kev kho cua sov (xws li annealing) tuaj yeem nqa tawm kom tshem tawm kev ua haujlwm nyuaj, rov ua kom cov ductility ntawm cov tooj liab ntshiab, thiab xyuas kom meej qhov kev vam meej ntawm txoj kev khoov. Ntawm tag nrho, ntshiab tooj liab zoo heev ductility ua rau nws yooj yim heev rau khoov, thiab nws yog ib yam khoom uas zoo heev bending kev kawm.
3. Stampability ntawm Pure Copper: Zoo Plasticity Enables Easy Stamping
Stampability yog hais txog lub peev xwm ntawm cov khoom siv los ua tiav rau hauv ntau qhov chaw nrog cov duab nyuaj los ntawm cov txheej txheem stamping xws li blanking, kos duab, khoov thiab tsim nyob rau hauv qhov kev txiav txim siab. Ntshiab tooj liab muaj zoo stampability, uas yog vim nws zoo heev plasticity, tsis tshua muaj yield zog thiab siab elongation, uas yuav ua tau raws li qhov yuav tsum tau ntawm ntau yam stamping txheej txheem.
Nyob rau hauv cov txheej txheem stamping ntawm cov tooj liab ntshiab, nws tuaj yeem ua rau cov yas deformation loj yam tsis muaj kev tawg, thiab tuaj yeem ua tiav rau hauv nyias- cov phab ntsa, cov khoom nkhaus thiab lwm yam khoom uas muaj qhov siab. Piv txwv li, hauv kev lag luam hluav taws xob, cov ntawv tooj liab ntshiab feem ntau raug ntaus rau hauv cov hluav taws xob tiv tauj, cov khoom siv hluav taws xob thiab lwm qhov chaw; Hauv kev lag luam tsheb, cov tooj liab ntshiab yog siv los ua cov khoom siv hluav taws xob, cov kav dej thiab lwm yam khoom siv. Ntshiab tooj liab qhov zoo stampability kuj tseem pom nyob rau hauv nws cov me me stamping quab yuam, uas tuaj yeem txo qhov hnav ntawm stamping tuag thiab txhim kho kev tsim khoom.
Zoo ib yam li cov txheej txheem dabtsi yog khoov, cov tooj liab ntshiab kuj tseem tuaj yeem tsim ua haujlwm hnyav thaum lub sij hawm stamping, tshwj xeeb tshaj yog nyob rau hauv cov txheej txheem ntawm kev sib sib zog nqus nqus thiab lwm yam txheej txheem nrog loj deformation. Ua hauj lwm hardening yuav ua rau kom cov hardness ntawm cov khoom, txo plasticity, thiab cuam tshuam rau cov txheej txheem stamping tom ntej. Yog li ntawd, nyob rau hauv qhov tseeb ntau lawm, intermediate annealing feem ntau yog ua los ntawm ntau yam stamping txheej txheem los mus tshem tawm kev ua hauj lwm hardening, restore lub yas lub xeev ntawm ntshiab tooj liab, thiab xyuas kom meej qhov kev vam meej ntawm stamping. Tsis tas li ntawd, qhov saum npoo ntawm cov tooj liab ntshiab yog du, uas tuaj yeem txo qhov kev sib txhuam ntawm cov khoom thiab cov tuag thaum lub sij hawm stamping, tsis txhob khawb qhov chaw, thiab txhim kho qhov zoo ntawm qhov chaw stamping.
Xaus
Piv txwv li, tooj liab ntshiab muaj cov txheej txheem zoo ntawm weldability, bendability thiab stampability. Nws cov bendability thiab stampability yog zoo heev vim nws zoo heev ductility thiab plasticity, thiab nws yog ib qho yooj yim mus ua ntau yam duab los ntawm cov txheej txheem yooj yim. Txawm hais tias nws cov weldability cuam tshuam los ntawm nws cov thermal conductivity thiab oxidation yooj yim, nws tuaj yeem yooj yim welded los ntawm kev xaiv qhov tsim nyog vuam txoj kev thiab tswj cov txheej txheem tsis. Yog li ntawd, ntshiab tooj liab yog cov khoom siv uas yooj yim rau vuam, khoov thiab stamp, thiab nws cov txheej txheem zoo heev, ua ke nrog nws cov hluav taws xob zoo thiab thermal conductivity, ua rau nws siv dav hauv ntau yam.
