Lub luag hauj lwm ntawm ntau yam khoom hauv hluav taws xob cua sov hlau, hluav taws xob rauv hlau, thiab tsis kam sawb
Tso lus
Hluav taws xob cua sov hlau yog cov khoom siv hluav taws xob uas siv hluav taws xob uas siv cov yam ntxwv ntawm cov hlau ua kom muaj cua sov. Txhawm rau txhim kho kev ua haujlwm ntawm cov hluav taws xob hluav taws xob hluav taws xob thiab tau txais qee yam khoom tshwj xeeb, nws txhob txwm sib xyaw nrog ntau yam khoom siv thaum lub sij hawm smelting, thiab yog li feem ntau hu ua hluav taws xob cua sov alloy.
Cov khoom siv feem ntau siv rau cov hluav taws xob hauv hluav taws xob tuaj yeem muab faib ua ob hom alloys: Ni Cr thiab Fe Cr Al. Dav siv los ua hluav taws xob cua sov rau ntau yam kev lag luam furnaces, kuaj rauv taws, thiab cov khoom siv hauv tsev.
1. Ni Cr series hluav taws xob cua sov hlau yog ua los ntawm nickel (los yog hlau) thiab feem ntau muaj 15 feem pua rau 30 feem pua Cr thiab 29 feem pua rau 80 feem pua Ni, nthuav qhia cov qauv austenitic. Qhov siab tshaj plaws kev khiav hauj lwm kub rau feem ntau siv Cr20Ni80 hluav taws xob cua sov hlau yog 1200 degree.
2. Cov Fe Cr Al series tiv thaiv daim kab xev yog raws li cov hlau thiab feem ntau muaj 12 feem pua rau 30 feem pua Cr, 4 feem pua rau 8 feem pua Al, thiab qhov seem yog Fe. Nws yog cov qauv ferrite thiab tuaj yeem siv mus txog qhov kub siab tshaj ntawm 1400 degree.
Lub luag haujlwm ntawm cov ntsiab lus hauv hluav taws xob cua sov xov hlau:
Chromium - txhim kho oxidation tsis kam, kub-kub oxidation tsis kam, sulfurization tsis kam, thiab kuj rau pitting thiab interstitial corrosion ntawm hluav taws xob rauv nyob ntawm tej.
Nickel - muab metallurgical stability, txhim kho thermal stability thiab weldability, txhim kho corrosion kuj los txo acids thiab caustic soda, thiab txhim kho kev nyuaj siab corrosion cracking tsis kam ntawm hluav taws xob hlau, tshwj xeeb tshaj yog nyob rau hauv chloride thiab caustic soda ib puag ncig.
Hlau - txhim kho qhov kev tiv thaiv ntawm hluav taws xob cua sov nyob ntawm qhov kub ntawm qhov chaw carburizing, txo cov nqi hlau, thiab tswj cov thermal expansion.
Aluminium - txhim kho qhov kub-kub oxidation tsis kam ntawm hluav taws xob rauv hlau thiab txhim kho lub hnub nyoog hardening.
Niobium - ua ke nrog cov pa roj carbon monoxide, txo cov kev cuam tshuam ntawm intergranular los ntawm chromium carbide nag lossis daus thaum kho cua sov, txhim kho kev tiv thaiv pitting thiab interstitial corrosion.
Molybdenum - txhim kho corrosion kuj ntawm hluav taws xob cua sov xov hlau kom txo cov acids, txhim khu kev tiv thaiv rau pitting thiab interstitial corrosion nyob rau hauv chloride uas muaj cov tshuaj aqueous, thiab txhim khu lub zog kub.
Cobalt - muab qhov kub thiab txias zog txhim kho los ntawm cov hluav taws xob hluav taws xob hauv hluav taws xob, txhim kho kev tiv thaiv carbonization thiab sulfurization.
Copper - Txhim kho qhov kev tiv thaiv corrosion ntawm cov hlua tiv thaiv kom txo cov kua qaub (tshwj xeeb tshaj yog sulfuric acid thiab hydrofluoric acid siv nyob rau hauv qhov chaw tsis muaj cua) thiab ntsev. Ntxiv tooj liab rau npib tsib xee chromium molybdenum hlau alloys pab txhim kho corrosion kuj rau hydrofluoric acid, phosphoric acid, thiab sulfuric acid.
Titanium - ua ke nrog cov pa roj carbon monoxide, txo cov kev cuam tshuam ntawm intergranular los ntawm chromium carbide nag lossis daus thaum lub sijhawm kho cua sov, txhim kho kev tiv thaiv kab mob kev laus ntxiv dag zog rau kev ua haujlwm, thiab txhim kho lub zog kub.
Tungsten - Txhim kho kev tiv thaiv kom tsis txhob muaj cov kua qaub thiab cov tshuaj tiv thaiv hauv zos, txhim khu kev tiv thaiv band zog thiab weldability.
Nitrogen - Txhim kho metallurgical stability, txhim khu kev tiv thaiv pitting thiab interstitial corrosion, thiab txhim khu lub zog.
