I-Low Expansion Alloy Kovar 4j29 Wire, 29HK Wire ye-Glass Sealing Alloy
I-alloy-4J29 ayinakho nje ukunwetshwa okushisayo okufana nengilazi, kodwa ijika layo lokunweba elishisayo elingavamile ngokuvamile lingenziwa ukuze lifane nengilazi, ngaleyo ndlela livumele ukujoyina ukubekezelela ububanzi obubanzi bokushisa. Ngokwekhemikhali, ibophela engilazini ngongqimba lwe-oxide olumaphakathi lwe-nickel oxide ne-cobalt oxide; ingxenye ye-iron oxide iphansi ngenxa yokuncipha kwayo nge-cobalt. Amandla ebhondi ancike kakhulu kugqinsi lwesendlalelo se-oxide nohlamvu. Ukuba khona kwe-cobalt kwenza ungqimba lwe-oxide lube lula ukuncibilika nokuncibilika engilazini encibilikisiwe. Umbala ompunga, ompunga-oluhlaza okwesibhakabhaka noma ompunga-nsundu ukhombisa uphawu oluhle. Umbala we-metallic ubonisa ukuntuleka kwe-oxide, kuyilapho umbala omnyama ubonisa insimbi ene-oxidized ngokweqile, kuzo zombili izimo okuholela ekuhlanganyeleni okubuthakathaka.
Isicelo:Isetshenziswa kakhulu ezingxenyeni ze-vacuum kagesi kanye nokulawula okuphumayo, ishubhu lokushaqeka, ishubhu lomlilo, i-magnetron yengilazi, ama-transistors, ipulaki yophawu, i-relay, i-lead amasekethe ahlanganisiwe, i-chassis, abakaki nokunye ukuvalwa kwezindlu.
Ukwakheka okujwayelekile%
| Ni | 28.5~29.5 | Fe | U-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 |
Amandla Okuqina, MPa
| Ikhodi yesimo | Isimo | Intambo | Hlikihla |
| R | Ithambile | ≤585 | ≤570 |
| 1/4 ngi | 1/4 Kunzima | 585~725 | 520~630 |
| 1/2 ngi | 1/2 Kunzima | 655~795 | 590 ~ 700 |
| 3/4 ngi | 3/4 Kunzima | 725~860 | 600-770 |
| I | Kunzima | ≥850 | ≥700 |
Izakhiwo ezibonakalayo ezijwayelekile
| Ukuminyana (g/cm3) | 8.2 |
| Ukumelana nogesi ku-20ºC(Ωmm2/m) | 0.48 |
| Ithempelesha yokumelana ne-resistant(20ºC~100ºC)X10-5/ºC | 3.7~3.9 |
| Iphoyinti le-Curie Tc/ ºC | 430 |
| I-Elastic Modulus, E/Gpa | 138 |
I-coefficient yokwandisa
| 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 |
I-Thermal conductivity
| θ/ºC | 100 | 200 | 300 | 400 | 500 |
| λ/ W/(m*ºC) | 20.6 | 21.5 | 22.7 | 23.7 | 25.4 |
| Inqubo yokwelapha ukushisa | |
| I-Annealing yokunciphisa ukucindezeleka | Kushisiswe ku-470~540ºC futhi kubambe 1~2 h. Kuphole phansi |
| ukwehlisa | Ku-vacuum eshiselwe ku-750~900ºC |
| Ukubamba isikhathi | 14 min ~ 1h. |
| Izinga lokupholisa | Akukho ngaphezu kuka-10 ºC/min kupholiswe ku-200 ºC |
