China Low Expansion Alloy Kovar 4j29 Wire, 29HK Wire yeGlass Sealing Alloy Manufacture and Factory

Low Expansion Alloy Kovar 4j29 Wire, 29HK Wire yeGlass Sealing Alloy

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Alloy-4J29 (Kuwedzera alloy)
(Zita rakajairika: Kovar, Nilo K, KV-1, Dilver Po, Vacon 12)
Alloy-4J29 inozivikanwawo seKovar alloy. rakagadzirwa kuti rizadzise kudiwa kwechisimbiso chegirazi-kusimbi chinovimbika, chinodiwa mumidziyo yemagetsi yakadai semagirobhu emwenje, machubhu evacuum, machubhu e<em>cathode ray, uye mumagadzirirwo evacuum mukemesitiri nokumwe kutsvakurudza kwesayenzi. Masimbi mazhinji haakwanise kuvharira girazi nekuti coefficient yavo yekuwedzera kupisa haina kufanana negirazi, saka iyo joint inotonhorera mushure mekugadzira kushushikana nekuda kwekusiyana kwekuwedzera kwegirazi nesimbi kunoita kuti chibatanidza chitsemuka.

Muenzaniso NO.:Kovar

OEM:Ehe

Nyika:Yakapfava 1/2 yakaoma yakaoma T-yakaoma

HS Kodhi:74099000

KwakabvaChina

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Alloy-4J29 haingove nekuwedzera kwekushisa kwakafanana negirazi, asi iyo isina mutsara yekuwedzera inopisa curve inogona kazhinji kuitwa kuti ienderane negirazi, zvichiita kuti chibatanidzi chikwanise kushivirira huwandu hwekushisa. Kemikari, inosungira kugirazi kuburikidza nepakati oxide layer ye nickel oxide uye cobalt oxide; chikamu chesimbi oxide chakaderera nekuda kwekuderedzwa kwayo necobalt. Kusimba kwechisungo kunoenderana zvakanyanya neiyo oxide layer ukobvu uye hunhu. Kuvapo kwecobalt kunoita kuti iyo oxide layer iite nyore kunyunguduka uye kunyungudika mugirazi rakanyungudutswa. Iro grey, grey-blue kana grey-brown ruvara runoratidza chisimbiso chakanaka. Rudzi rwesimbi runoratidza kushaikwa kweokisidhi, nepo ruvara rutema runoratidza simbi yakanyanyisa oxidized, mune zvese zviri zviviri zvinotungamira kune isina kusimba joint.

Application:Inonyanya kushandiswa mumagetsi vacuum zvikamu uye emission control, shock chubhu, igniting chubhu, girazi magnetron, transistors, chisimbiso plug, relay, akasanganiswa maseketi lead, chassis, mabhureki uye kumwe kuvhara kwedzimba.

Zvakajairwa

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

Kusimba Simba, MPa

Code of condition	Condition	Waya	Strip
R	Soft	≤585	≤570
1/4I	1/4 Zvakaoma	585~725	520~630
1/2I	1/2 Zvakaoma	655~795	590~700
3/4I	3/4 Zvakaoma	725~860	600~770
I	Zvakaoma	≥850	≥700

Typical Physical properties

Density (g/cm3)	8.2
Kuramba kwemagetsi pa20ºC(Ωmm2/m)	0.48
Tembiricha yekudzivirira (20ºC~100ºC)X10-5/ºC	3.7~3.9
Curie point Tc/ ºC	430
Elastic Modulus, E/Gpa	138

Coefficient yekuwedzera

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

Thermal conductivity

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

Nzira yekurapa kupisa
Annealing yekuzorodza stress	Kupisa kusvika 470 ~ 540ºC uye kubata 1 ~ 2 h. Kutonhora pasi
annealing	Muvacuum inopisa kusvika 750 ~ 900ºC
Kubata nguva	14 min~1h.
Chiyero chekutonhora	Hapana kupfuura 10 ºC/min yakatonhodzwa kusvika ku200 ºC