Yakakwira density, yakanakisa kuumbwa uye machinability, yakasarudzika corrosion kuramba, yakakwira modulus ye elasticity, inoshamisa yekupisa conductivity uye kuderera kwekuwedzera kwemafuta. Isu tinopa: yedu tungsten heavy metal alloys.
Yedu "heavyweights" anoshandiswa, semuenzaniso, mumaindasitiri endege uye emuchadenga, tekinoroji yekurapa, maindasitiri emotokari uye ekutanga kana kuchera oiri negesi. Isu tinopa muchidimbu zvitatu zveizvi pazasi:
Yedu tungsten heavy metal alloys W-Ni-Fe neW-Ni-Cu ine yakanyanya kusimba (17.0 kusvika 18.8 g/cm3) uye inopa inovimbika kudzivirira pa X-ray uye gamma mwaranzi. Ose ari maviri W-Ni-Fe uye yedu isiri-magineti zvinhu W-Ni-Cu anoshandiswa kudzivirira semuenzaniso mukushandiswa kwekurapa asiwo muindasitiri yemafuta negesi. Semacollimator mumidziyo yekurapa radiation vanova nechokwadi chekuratidzwa chaiko. Mukuenzanisa uremu isu tinoshandisa iyo yakanyanya kukwirira density yedu tungsten heavy metal alloy. W-Ni-Fe uye W-Ni-Cu inongowedzera zvishoma pane tembiricha yakakwira uye inobvisa kupisa zvakanyanya. Sekuisa mold yealuminium basa rekutanga, anogona kudzokororwa nekudziiswa nekutonhodzwa pasina kuita brittle.
Muchigadzirwa cheMagetsi Discharge Machining (EDM), masimbi anogadzirwa kusvika padanho rakanyanyisa rekuita nenzira yekubuda kwemagetsi pakati pechishandiso uye electrode. Kana maelectrode emhangura nemagraphite asiri kusvika pabasa, maelectrode asingasviki tungsten-mhangura anokwanisa kugadzira kunyange simbi dzakaoma pasina dambudziko. Mune plasma yekupfapfaidza nozzles yeindastiri yekupfekedza, zvinhu zvetungsten nemhangura zvakare zvinopindirana zvakakwana.
Infiltrated metallic tungsten heavy metals ine zvinhu zviviri zvinoumba zvinhu. Munguva yemaitiro maviri-matanho ekugadzira, porous sintered base inotanga kugadzirwa kubva muchikamu chine yakakwira kunyungudika, semuenzaniso refractory simbi, pamberi pemapores akazaruka anobva apinzwa nechikamu chakanyungudika nechepasi. Zvinhu zvezvikamu zvega zvega zvinoramba zvisina kuchinjwa. Kana ichiongororwa pasi pemaikorosikopu, zvinhu zvechimwe nechimwe chezvikamu zvinoramba zvichionekwa. Pane iyo macroscopic level, zvisinei, zvimiro zvega zvega zvinosanganiswa. Seye hybrid metallic material, iyo nyowani inogona, semuenzaniso, iine nyowani yekupisa conductivity uye thermal kuwedzera kukosha.
Liquid phase-sintered tungsten-heavy metals inogadzirwa kubva musanganiswa wesimbi hupfu mune imwe-nhanho yekugadzira maitiro panguva iyo zvikamu zvine nzvimbo yakaderera yekunyunguduka inonyungudutswa kune idzo dzine nzvimbo dzakanyanya kunyungudika. Munguva yebhainda, zvikamu izvi zvinoumba alloys neavo vane nzvimbo yakakwirira yekunyungudika. Kunyange huwandu hukuru hwe tungsten, iyo ine nzvimbo yakakwirira yekunyunguduka, inonyungudutswa panguva yebinder chikamu. Plansee's liquid phase sintered composite zvinhu zvinobatsira kubva kune tungsten chikamu che density, modulus ye elasticity uye kugona kutora X-ray uye gamma radiation pasina kutambura kubva kune chero zvipingamupinyi zvine chekuita nekugadziriswa kwe pure tungsten Mukupesana, iyo coefficient yekuwedzera kwekupisa uye kupisa uye magetsi conductivity yemvura chikamu-sintered zvikamu zvinoenderana nehukuru hukuru pakuumbwa kunobatanidzwa muchikamu chebhainda.
Back-cast materials panguva imwe chete inosanganisa zvinhu zvezvinhu zviviri zvakasiyana zvezvinhu. Munguva iyi, zvigadzirwa pachazvo zvinochengetwa mumamiriro avo ekutanga uye zvinosungwa chete pamutsetse mutete. Masimbi anosanganiswa muforoma kuti aite chisungo chema micrometer mashoma muhukuru. Kusiyana nevelding uye solder tekinoroji, iyi nzira inonyanya kugadzikana uye inovimbisa optimum thermal conduction.
Zvigadzirwa Zvinopisa zveTungsten Heavy Alloys
