Vim li cas thiaj siv kub plating?
Kub feem ntau yog siv rau hauv kev ntseeg siab, tsis tshua muaj hluav taws xob lossis cov ntawv thov tam sim no. Kub yog siv nyob rau hauv high cycle daim ntaub ntawv vim nws yog check thiab muaj zoo heev puas kuj. Samtec kub yog alloyed nrog cobalt, uas ua rau kom hardness.
Kub yog cov hlau muaj txiaj ntsig, uas txhais tau tias nws tsis teb ntau rau ib puag ncig. Yog li ntawd, kub kuj tau pom zoo rau qhov hnyav ib puag ncig vim nws tsis tsim oxides uas tuaj yeem ua rau muaj kev tiv thaiv ntau ntxiv.
Kub yog qee zaum "yuav tsum muaj" vim tias cov khoom sib txuas yog qhov me me, cov kev sib cuag me me dhau los ua kom muaj zog ntau dua. Yog li ntawd, qis ib txwm quab yuam taw qhia qhov xav tau rau kev kub plating.
Qhov tsis zoo ntawm kub yog tus nqi feem ntau, ua raws li qhov porosity ntawm thinner plating, thiab qee qhov nuances hauv solderability. Tshwj xeeb, ntau tus neeg siv khoom "ua tiav" soldered cov no, tab sis lawv tsis tau solder rau Au vim tias Au dissolves nyob rau hauv molten solder. Lawv raug soldered rau nickel nyob rau hauv Au. Yog li nws yog technically tseeb hais tias kub muaj tsis zoo solderability.
Vim li cas thiaj siv tin plating?
Tin yog ib qho khoom siv qis rau kub nrog zoo heev solderability. Tsis zoo li kub, tin tsis yog hlau muaj nuj nqis. Tin plating pib oxidize lub caij nws raug rau huab cua. Yog li ntawd, tinned tiv tauj tshuab yuav tsum muaj zog dua qub thiab qhov chaw sib cuag ntev dua kom tawg los ntawm cov oxide zaj duab xis.
Tin feem ntau yog qhov nyiam vim nws tus nqi qis hauv daim ntawv thov nrog qee qhov me me ntawm mating cycles nrog rau qhov tsim nyog quab yuam.
Dab tsi yog qhov kev xaiv plating nrov tshaj plaws?
Xaiv kub tin plating yog Samtec qhov kev xaiv plating nrov tshaj plaws vim nws muab cov neeg tsim khoom zoo tshaj plaws ntawm ob lub ntiaj teb. Qhov chaw tiv tauj, thaj chaw tseem ceeb rau kev sib cuag thiab lub davhlau ya nyob twg pins thiab cov teeb liab kis tau tus mob, muaj kev ntseeg siab ntawm kub. Cov tails yog soldered rau lub rooj tsavxwm kom txo nqi thiab txhim kho solderability ntawm tin.
Kub tuaj yeem welded?
Cov txheej txheem no yuav tsum tau ua tib zoo txiav txim siab zoo, vim tias cov kub plating dissolves nyob rau hauv lub solder, yog li qhov kev pheej hmoo ntawm solder da dej paug thiab kub embrittlement yog tiag tiag:
Raws li tau hais ua ntej, solder paste yuav tsis solder rau lub rooj tsavxwm kub. Lub phaj kub yog yaj nyob rau hauv lub molten solder thiab lub soldering yog ua nyob rau hauv lub nickel puag phaj.
Embrittlement dhau los ua teeb meem thaum kub hnyav pab txhawb 3 mus rau 5 feem pua ntawm cov khoom sib koom ua ke.
Dab tsi cuam tshuam kub plating thickness muaj nyob rau hauv hluav taws xob tiv tauj thiab connectors?
Cov nqi kub yog hovering nyob ze txhua lub sij hawm highs, yog li cov tuam txhab uas siv nws yuav tsum xav txiav cov nqi ntau npaum li sai tau. Yog li ntawd, peb feem ntau nug seb tus nqi kub puas tuaj yeem txo tau. Nws nyob ntawm qhov xwm txheej.
Muaj ob txoj hauv kev kom ua tiav qhov no: txo qhov chaw plating lossis txo qhov tuab ntawm cov nyiaj tso nyiaj kub. Qee zaum, kev xaiv plating tuaj yeem siv los txo cov cheeb tsam uas xav tau kub.
Raws li kev txo thickness, nws nyob ntawm daim ntawv thov, ntau yam uas yog tswj los ntawm MIL specifications los yog ASTM specifications. Qhov no yog qhov tseeb tshwj xeeb tshaj yog rau cov khoom siv kub-plated siv hauv cov tub rog thiab aerospace. Cov khoom lag luam thiab cov neeg siv khoom lag luam tuaj yeem yog cov neeg sib tw ua kom nyias nyias, tab sis qhov muaj peev xwm ntawm kev txi kev ua tau zoo thiab kev ua haujlwm ntev yuav tsum tau txiav txim siab.
Kev qhia tshwj xeeb thiab tswj kom zoo plating thickness yog qhov tseem ceeb kom tau txais kev ua tau zoo tshaj plaws los ntawm cov khoom siv hluav taws xob passive. Ntau yam yuav tsum tau txiav txim siab thaum qhia cov thickness, nrog rau cov khoom siv, ib puag ncig, thiab lub neej xav tau.
Rau qee cov khoom siv, kev ntxig thiab tshem tawm lub zog thiab kev ntsuas lub neej yuav muaj kev txhawj xeeb tshaj plaws. Txawm hais tias siv cov tuab tuab, nickel-hardened kub yuav tuav tau zoo dua li nws cov kub ntshiab. Hauv qhov no, thickness tsis yog qhov tseem ceeb li hardness. Txawm li cas los xij, yog tias kev ntsuas lub neej yog qhov tseem ceeb, cov txheej kub kub ntawm 0 tuab dua 000050 ntiv tes yuav kav ntev dua 0.000030 ntiv tes.
Rau lwm cov khoom, solderability lossis porosity yuav yog cov yam ntxwv tseem ceeb. Thaum porosity tseem ceeb, qhov hnyav dua kub plating lossis ob txheej kub yog nyiam. Txawm li cas los xij, ntau dua kub thicknesses tuaj yeem cuam tshuam tsis zoo rau solderability. Ntau tshaj 0.000050 ntiv tes kub yuav ua rau cov pob qij txha ua kom tawv nqaij, yog li kub tsawg yog qhov zoo tshaj rau nws ua kom zoo rau lub pob zeb npib tsib xee.
Yog tias koj xav tau lub voj voog siab, qis zog, zoo porosity thiab solderability, tsis txhob txhawj. Kev tso nyiaj kub nrog 0.000050 ntiv tes kub yuav muab tag nrho cov saum toj no yog tias lub connector yog pre-tinned ua ntej muab tso rau hauv kev pab cuam. Pre-tinning yuav tshem tawm feem ntau ntawm cov kub thiab tiv thaiv nickel nto nrog tin txheej. Txhua yam kub uas tseem tshuav raug tshem tawm thaum nws yog thaum kawg soldered hauv nws daim ntawv thov.
Ntau qhov chaw sib cuag tsuas yog ua phooj ywg ib zaug hauv qhov chaw me me, uas ua rau kev ntxig / tshem tawm thiab qhov porosity tsawg dua. Qhov no yog lwm qhov piv txwv uas kub txaus.
Yog li, thinning tuaj yeem txuag nyiaj? Qee zaum, yog. Tab sis peb yuav tsum nco ntsoov tias lub ntsiab yog vim li cas rau kev qhia kub rau connector qhov chaw yog corrosion kuj thiab hluav taws xob conductivity. Cov xwm txheej no yuav tsum yog lub hauv paus ntawm kev txiav txim siab thinning.
