Low Expansion Alloy Kovar 4j29 Hlau, 29HK Hlau rau iav Sealing Alloy
Alloy-4J29 tsis yog tsuas yog muaj thermal expansion zoo ib yam li iav, tab sis nws cov nonlinear thermal expansion nkhaus feem ntau tuaj yeem ua kom haum rau iav, yog li tso cai rau kev sib koom ua ke rau qhov kub thiab txias.Chemically, nws bonds rau iav ntawm nruab nrab oxide txheej ntawm nickel oxide thiab cobalt oxide;Qhov feem ntawm cov hlau oxide yog tsawg vim nws txo nrog cobalt.Lub zog ntawm daim ntawv cog lus yog nyob ntawm qhov oxide txheej thickness thiab tus cwj pwm.Lub xub ntiag ntawm cobalt ua rau oxide txheej yooj yim rau yaj thiab yaj hauv cov iav molten.Grey, grey-xiav los yog grey-xim av xim qhia tau hais tias lub foob zoo.Cov xim xim hlau qhia tias tsis muaj oxide, thaum xim dub qhia tias cov hlau oxidized dhau lawm, ob qho tib si ua rau muaj kev sib koom ua ke tsis muaj zog.
Daim ntawv thov:Mas siv nyob rau hauv hluav taws xob lub tshuab nqus tsev Cheebtsam thiab emission tswj, poob siab tube, igniting tube, iav magnetron, transistors, foob plug, relay, integrated circuits lead, chassis, brackets thiab lwm yam vaj tse sealing.
Muaj pes tsawg leeg%
| Ni | 28.5-29.5 Nws | Fe | Bal. | Co | 16.8-17.8 Nws | Si | ≤0.3 |
| Mo | ≤0.2 | Cu | ≤0.2 | Cr | ≤0.2 | Mn | ≤0.5 |
| C | ≤ 0.03 | P | ≤ 0.02 | S | ≤ 0.02 |
Tensile zog, MPa
| Code ntawm tus mob | Qhov xwm txheej | Hlau | Sawb |
| R | Mos | ≤ 585 | ≤ 570 |
| 1/4 Ib | 1/4 Khob | 585-725 : kuv | 520-630 : kuv |
| 1/2 Ib | 1/2 Nyhav | 655-795 Ib | 590-700 Nws |
| 3/4 Ib | 3/4 Khob | 725-860 : kuv | 600-770 Nws |
| I | Nyuaj | ≥850 | ≥700 |
Hom Lub cev muaj zog
| Qhov ceev (g / cm3) | 8.2 |
| Hluav taws xob tiv taus ntawm 20ºC (Ωmm2 / m) | 0.48 ib |
| Qhov ntsuas kub ntawm kev tiv thaiv (20ºC ~ 100ºC) X 10-5 / ºC | 3.7-3.9 Nws |
| Curie point Tc/ºC | 430 |
| Elastic Modulus, E / Gpa | 138 |
Coefficient ntawm expansion
| θ/ºC | 1/10-6ºC-1 | θ/ºC | 1/10-6ºC-1 |
| 20 ~ 60 | 7.8 ib | 20-500 Nws | 6.2 |
| 20-100 Nws | 6.4 | 20-550 Nws | 7.1 |
| 20-200 Nws | 5.9 | 20-600 Nws | 7.8 ib |
| 20-300 Nws | 5.3 | 20-700 Nws | 9.2 ib |
| 20-400 Nws | 5.1 | 20-800 Nws | 10.2 |
| 20-450 Nws | 5.3 | 20-900 Nws | 11.4 |
Thermal conductivity
| θ/ºC | 100 | 200 | 300 | 400 | 500 |
| λ / W / (m * ºC) | 20.6 ib | 21.5 ib | 22.7 ib | 23.7 ib | 25.4 ib |
| Cov txheej txheem kev kho cua sov | |
| Annealing rau kev ntxhov siab | Kub rau 470 ~ 540ºC thiab tuav 1 ~ 2 teev.Txias cia |
| annealing | Nyob rau hauv lub tshuab nqus tsev rhuab mus rau 750 ~ 900ºC |
| Tuav lub sijhawm | 14 feeb ~ 1h. |
| Txias tus nqi | Tsis pub tshaj 10 ºC / min txias rau 200 ºC |
