Cov ntaub ntawv yooj yim txog Molybdenum Alloys

Molybdenum alloys tsis yog -ferrous alloys uas muaj molybdenum ua lub hauv paus hlau thiab ntxiv ntawm lwm yam. Cov ntsiab lus alloying tseem ceeb suav nrog titanium, zirconium, hafnium, tungsten, thiab cov ntsiab lus tsis tshua muaj hauv ntiaj teb. Titanium, zirconium, thiab hafnium tsis tsuas yog muab cov kev daws teeb meem ntxiv dag zog rau molybdenum alloys, tswj lawv qhov qis- kub plasticity, tab sis kuj tsim cov theem ruaj khov, tawg tawg carbide theem, txhim kho cov alloy lub zog thiab recrystallization kub. Molybdenum alloys muaj qhov zoo thermal thiab hluav taws xob conductivity thiab qis coefficient ntawm thermal expansion. Lawv muaj lub zog siab ntawm qhov kub thiab txias (1100-1650 degree) thiab yooj yim rau kev ua haujlwm dua li tungsten.

Molybdenum alloys also possess high density, high melting point, low vapor pressure, low thermal expansion, and enhanced thermal strength, toughness, and corrosion resistance. Lawv tuaj yeem siv los ua daim phiaj thiab anodes hauv cov raj xa hluav taws xob, cov khoom siv rau cov khoom siv hluav taws xob, thiab rau kev tsim khoom tuag-casting thiab extrusion tuag, nrog rau cov khoom siv dav hlau. Txawm li cas los xij, kev txhim kho ntawm molybdenum alloys raug txwv los ntawm lawv qhov qis -kub brittleness thiab weld brittleness, thiab lawv susceptibility rau siab - kub oxidation (ie, tsis zoo oxidation kuj).

Kev lag luam tsim molybdenum alloys suav nrog molybdenum-titanium-zirconium alloys, molybdenum-tungsten alloys, thiab molybdenum- tsis tshua muaj ntiaj teb alloys, nrog thawj hom yog siv dav tshaj plaws. Raws li cov ntsiab lus alloying, molybdenum alloys tuaj yeem muab faib ua binary molybdenum alloys, multi-element molybdenum alloys, doped molybdenum alloys, thiab rare earth molybdenum alloys. Raws li hom kev txhawb zog, lawv tuaj yeem muab faib ua cov alloys ntxiv dag zog los ntawm kev daws teeb meem, alloys ntxiv dag zog los ntawm dispersion, alloys ntxiv dag zog los ntawm doping, thiab alloys ntxiv dag zog los ntawm kev sib xyaw ntawm cov ntsiab lus.

Lub ntsiab kev ntxiv dag zog rau molybdenum alloys yog cov tshuaj tiv thaiv kom muaj zog, nag lossis daus ntxiv, thiab ua haujlwm hardening. Los ntawm kev ua cov yas, molybdenum alloy daim hlau, strips, foils, raj, tuav, xov hlau, thiab cov ntaub ntawv tuaj yeem tsim tau, uas tuaj yeem txhim kho lawv lub zog thiab qis -kub plasticity.

Ntawm cov hlau refractory, molybdenum thiab nws cov alloys muaj qhov zoo thermal thiab hluav taws xob conductivity thiab qis coefficient ntawm thermal expansion (zoo ib yam li cov iav siv hauv electron raj). Lawv kuj muaj lub zog siab ntawm qhov kub thiab txias (1100-1650 degree) thiab ua kom yooj yim dua li tungsten. Yog li ntawd, lawv tau siv rau hauv kev tsim cov raj electron (daim phiaj thiab anodes), cov khoom siv hluav taws xob (cov ntaub ntawv txhawb nqa), cov cuab yeej siv hlau (tuag-casting thiab extrusion tuag thiab perforated mandrels), thiab hauv kev lag luam aerospace. Molybdenum tiv taus corrosion los ntawm cov iav molten, thiab nws cov oxides tsis paug cov iav. Txij li xyoo 1943, molybdenum tau siv rau hauv kev lag luam iav ua cua sov electrodes. Mo-30W alloy, nrog nws zoo heev tiv thaiv molten zinc corrosion, tau ua tiav nyob rau hauv kev lag luam zinc smelting. Molybdenum kuj tseem siv rau hauv kev tsim cov khoom xws li cov khoom siv hluav taws xob thiab cov khoom siv hauv cov khoom siv sulfuric acid.