4j42 ibyog ib qho hlau-nickel tsau expansion alloy, feem ntau muaj hlau (Fe) thiab npib tsib xee (Ni), nrog rau cov ntsiab lus npib tsib xee txog li 41% mus rau 42%. Tsis tas li ntawd, nws tseem muaj cov kab me me xws li silicon (Si), manganese (Mn), carbon (C), thiab phosphorus (P). Qhov tshwj xeeb chemica muaj pes tsawg leeg ua rau nws ua tau zoo heev.

Nyob rau hauv lub xyoo pua 20th thaum ntxov, nrog kev nce ntawm kev siv tshuab hluav taws xob, aerospace thiab lwm yam kev lag luam, cov kev xav tau siab dua tau muab tso rau pem hauv ntej rau cov khoom siv thermal expansion thiab mechanical zog ntawm cov ntaub ntawv, thiab cov kws tshawb fawb pib tshawb nrhiav cov ntaub ntawv alloy nrog cov khoom tshwj xeeb. Raws li ib tug hlau-nickel-cobalt alloy, kev tshawb fawb thiab kev loj hlob ntawm 4J42 expansion alloy yog precisely kom tau raws li cov kev xav tau ntawm cov teb rau cov khoom siv. Los ntawm tsis tu ncua kho cov ntsiab lus ntawm cov ntsiab lus xws li npib tsib xee, hlau, thiab cobalt, qhov kwv yees muaj pes tsawg leeg ntawm 4J42 alloy tau maj mam txiav txim siab, thiab tib neeg kuj tau pib tau txais daim ntawv thov ua ntej hauv qee qhov chaw uas yuav tsum tau ua rau cov khoom siv tau zoo.

Nrog rau kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis tsis tu ncua, qhov kev ua tau zoo ntawm 4J42 expansion alloy tseem tau txais ntau dua thiab siab dua. Cov kws tshawb fawb txuas ntxiv txhim kho kev ua tau zoo ntawm 4J42 alloy los ntawm kev txhim kho cov txheej txheem ntau lawm thiab ua kom zoo dua cov hlau alloy. Piv txwv li, kev siv cov thev naus laus zis thev naus laus zis ntau dua thiab ua cov thev naus laus zis tau txhim kho cov purity thiab uniformity ntawm cov hlau, thiab ntxiv txo qhov cuam tshuam ntawm impurity ntsiab ntawm kev ua haujlwm ntawm cov hlau. Nyob rau tib lub sijhawm, cov txheej txheem kev kho cua sov thiab cov txheej txheem vuam ntawm 4J42 alloy kuj tau kawm tob, thiab ntau cov txheej txheem kev tshawb fawb thiab tsim nyog tau raug tsim los txhim kho kev ua haujlwm thiab siv kev ua haujlwm ntawm cov hlau.

Nyob rau hauv xyoo tas los no, nrog kev loj hlob sai ntawm electronics, aerospace, kev kho mob thiab lwm yam kev lag luam, qhov kev thov rau 4J42 expansion alloy tau txuas ntxiv mus, thiab daim ntawv thov teb tau txuas ntxiv mus. Hauv kev lag luam hluav taws xob, nrog kev txhim kho txuas ntxiv ntawm kev sib koom ua ke, cov khoom siv hluav taws xob semiconductor, thiab lwm yam, cov khoom siv ntim khoom yuav tsum tau nce siab dua. 4J42 alloy tau dhau los ua cov khoom tseem ceeb hauv kev ntim khoom hluav taws xob vim nws qhov kev ua tau zoo thermal expansion thiab vuam kev ua tau zoo.

Nrog rau kev nce qib ntawm cov thev naus laus zis ntau lawm, kev saib xyuas ntau dua yuav raug them rau kev txhim kho cov purity ntawm cov hlau thiab txo cov ntsiab lus ntawm impurity ntsiab yav tom ntej. Qhov no yuav ntxiv dag zog rau kev ua haujlwm ruaj khov ntawm cov hlau, txo cov kev ua haujlwm hloov pauv los ntawm impurities, thiab txhim kho kev ntseeg siab ntawm cov hlau hauv cov ntawv siv high-precision. Piv txwv li, nyob rau hauv lub tshav pob ntawm hluav taws xob, siab purity 4J42 alloy yuav xyuas kom meej lub sij hawm ntev stability thiab siab ua hauj lwm ntawm hluav taws xob Cheebtsam.