Tuam Tshoj Kover Expansion Alloy 4J29 Hlau 0.008mm rau Kev Lag Luam Hluav Taws Xob Nqus Tsev Tsim Khoom thiab Hoobkas

Kover Expansion Alloy 4J29 Hlau 0.008mm rau Kev Lag Luam Hluav Taws Xob Nqus Tsev

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Cov Cim Npe Khoom

Kev nthuav dav Alloy Kovar Hlau Alloy-4J29

(Common Name: Kovar, Nilo K, KV-1, Dilver Po, Vacon 12)
Alloy-4J29 tseem hu ua Kovar alloy. nws tau tsim los ua kom tau raws li qhov xav tau rau lub foob iav-rau-hlau txhim khu kev qha, uas yog qhov xav tau hauv cov khoom siv hluav taws xob xws li lub teeb, cov raj nqus tsev, cov raj cathode ray, thiab hauv cov tshuab nqus tsev hauv chemistry thiab lwm yam kev tshawb fawb. Feem ntau cov hlau tsis tuaj yeem kaw rau iav vim tias lawv cov coefficient ntawm thermal expAN SIon tsis zoo ib yam li iav, yog li thaum qhov sib koom ua ke txias tom qab tsim cov kev ntxhov siab vim qhov sib txawv ntawm expAN SIon ntawm iav thiab hlau ua rau qhov sib koom ua ke tawg.
(-Kovar)
Kovar yog ib qho nickel-cobalt ferrous alloy uas zoo ib yam li Fernico, tsim los kom sib xws nrog cov yam ntxwv thermal expAN SIon ntawm borosilicate iav (~ 5 × 10?6 /K ntawm 30 thiab 200 °C, rau ~ 10 × 10?6 /K ntawm 800 °C) kom tso cai rau kev sib txuas ncaj qha hla ntau qhov kub thiab txias. Nws pom daim ntawv thov hauv cov hlau electroplated nkag mus rau hauv cov iav envelopes ntawm cov khoom siv hluav taws xob xws li cov raj nqus tsev (valves), X-ray thiab microwave raj thiab qee lub teeb.
Lub npe Kovar feem ntau yog siv los ua ib lo lus dav dav rau Fe-Ni alloys nrog cov yam ntxwv tshwj xeeb no thermal expAN SIon. Nco ntsoov txog Fe-Ni alloy Invar uas muaj qhov tsawg kawg nkaus thermal expAN SIon.

Alloy-4J29 tau tsim los ua kom tau raws li qhov xav tau ntawm lub foob iav-rau-hlau txhim khu kev qha, uas yog qhov xav tau hauv cov khoom siv hluav taws xob xws li lub teeb, cov raj nqus tsev, cov raj cathode ray, thiab hauv cov tshuab nqus tsev hauv chemistry thiab lwm yam kev tshawb fawb. Feem ntau cov hlau tsis tuaj yeem kaw rau iav vim tias lawv cov coefficient ntawm thermal expAN SIon tsis zoo ib yam li iav, yog li thaum qhov sib koom ua ke txias tom qab tsim cov kev ntxhov siab vim qhov sib txawv ntawm expAN SIon ntawm iav thiab hlau ua rau qhov sib koom ua ke tawg.

Alloy-4J29 tsis yog tsuas muaj thermal expAN SIon zoo ib yam li iav xwb, tab sis nws cov kab thermal expAN SIon nonlinear feem ntau tuaj yeem ua kom phim iav, yog li tso cai rau qhov sib koom ua ke kom tiv taus qhov kub thiab txias ntau. Chemically, nws khi rau iav ntawm cov txheej oxide nruab nrab ntawm nickel oxide thiab cobalt oxide; qhov feem pua ntawm hlau oxide qis vim nws txo qis nrog cobalt. Lub zog sib koom ua ke yog nyob ntawm qhov tuab thiab tus cwj pwm ntawm cov txheej oxide. Qhov muaj cobalt ua rau cov txheej oxide yooj yim yaj thiab yaj hauv cov iav yaj. Xim grey, grey-xiav lossis grey-xim av qhia txog kev foob zoo. Xim hlau qhia txog tsis muaj oxide, thaum xim dub qhia txog hlau oxidized ntau dhau, ob qho tib si ua rau qhov sib koom ua ke tsis muaj zog.

Feem ntau siv rau hauv cov khoom siv hluav taws xob thiab kev tswj hwm pa phem, lub raj xa hluav taws xob poob siab, lub raj xa hluav taws xob, iav magnetron, trAN SIstors, lub ntsaws foob, relay, cov khoom siv hluav taws xob sib xyaw ua ke, chassis, brackets thiab lwm yam kev sib khi hauv tsev.

Cov khoom sib xyaw ib txwm muaj%

Ni	28.5~29.5	Fe	Bal.	Co	16.8~17.8	Si	≤0.3
Mo	≤0.2	Cu	≤0.2	Cr	≤0.2	Mn	≤0.5
C	≤0.03	P	≤0.02	S	≤0.02

Lub zog tensile, MPa

Cov cai ntawm qhov xwm txheej	Mob	Hlau	Sawb
R	Mos mos	≤585	≤570
1/4I	1/4 Nyuaj	585~725	520~630
1/2I	1/2 Nyuaj	655~795	590~700
3/4I	3/4 Nyuaj	725~860	600~770
I	Nyuaj	≥850	≥700

Cov khoom siv lub cev ib txwm muaj

Qhov Ceev (g/cm3)	8.2
Kev tiv taus hluav taws xob ntawm 20ºC (mm2 / m)	0.48
Qhov ntsuas kub ntawm kev tiv thaiv (20ºC ~ 100ºC) X 10-5 / ºC	3.7~3.9
Curie point Tc/ ºC	430
Modulus Elastic, E/ Gpa	138

Coefficient ntawm expAN SIon

θ/ºC	α1/10-6ºC-1	θ/ºC	α1/10-6ºC-1
20 ~ 60	7.8	20 ~ 500	6.2
20 ~ 100	6.4	20 ~ 550	7.1
20 ~ 200	5.9	20 ~ 600	7.8
20 ~ 300	5.3	20 ~ 700	9.2
20 ~ 400	5.1	20 ~ 800	10.2
20 ~ 450	5.3	20 ~ 900	11.4

Kev ua kom sov tau zoo

θ/ºC	100	200	300	400	500
λ/ W/(m*ºC)	20.6	21.5	22.7	23.7	25.4

Cov txheej txheem kho cua sov
Kev ua kom sov rau kev txo kev ntxhov siab	Kub txog 470~540ºC thiab tuav 1~2 teev. Txias cia
kev ua kom sov	Hauv lub tshuab nqus tsev kom sov txog 750 ~ 900ºC
Lub sijhawm tuav	14 feeb ~ 1 teev.
Tus nqi txias	Tsis pub ntau tshaj 10 ºC/feeb txias rau 200 ºC

Hom kev muab khoom

Lub Npe Alloys	Hom	Qhov Loj
Cov hlau nplaum-4J29	Hlau	D = 0.1 ~ 8 hli
Cov hlau nplaum-4J29	Sawb	W = 5 ~ 250 hli	T = 0.1 hli
Cov hlau nplaum-4J29	Ntawv ci	W = 10 ~ 100 hli	T = 0.01 ~ 0.1
Cov hlau nplaum-4J29	Bar	Dia = 8 ~ 100 hli	L = 50 ~ 1000