Kev cuam tshuam ntawm Molybdenum

Cov nyhuv ntawm Molybdenum ntawm cov qauv
Ob qho molybdenum thiab chromium yog cov khoom tsim thiab ruaj khov ferrite thiab nthuav dav ferrite theem cheeb tsam. Lub peev xwm ntawm molybdenum los ua ferrite yog sib npaug ntawm chromium. Molybdenum kuj tseem txhawb cov theem sib txawv hauv austenitic stainless hlau, xws li σ Phase, κ Cov nag lossis daus sib npaug rau Laves tuaj yeem muaj kev cuam tshuam tsis zoo rau kev tiv thaiv corrosion thiab cov khoom siv tshuab ntawm cov hlau, tshwj xeeb tshaj yog ua rau txo qis hauv plasticity thiab toughness. Txhawm rau kom tswj tau ib qho austenite qauv hauv austenitic stainless hlau, cov ntsiab lus ntawm austenite tsim cov ntsiab lus (nickel, nitrogen, manganese, thiab lwm yam) yuav tsum tau nce ntxiv nrog kev nce ntawm molybdenum cov ntsiab lus hauv cov hlau, txhawm rau kom muaj kev sib npaug. nruab nrab ntawm ferrite thiab austenite tsim cov ntsiab lus hauv cov hlau.
Cov nyhuv ntawm 2 Molybdenum ntawm Kev Ua Haujlwm
Cov nyhuv oxidation ntawm molybdenum ntawm austenitic stainless hlau tsis tseem ceeb. Yog li ntawd, thaum chromium npib tsib xee austenitic stainless hlau tuav ib tug austenite qauv thiab tsis muaj intermetallic nag lossis daus, qhov sib ntxiv ntawm molybdenum muaj me ntsis cuam tshuam rau nws chav tsev kub txhua yam khoom. Txawm li cas los xij, nrog kev nce ntawm molybdenum cov ntsiab lus, qhov kub thiab txias zog ntawm cov hlau txhim kho zoo heev, xws li durability thiab creep zog. Yog li ntawd, molybdenum uas muaj cov hlau tsis muaj steel feem ntau yog siv rau qhov kub thiab txias. Txawm li cas los xij, qhov sib ntxiv ntawm molybdenum ua rau kom qhov kub thiab txias deformation tsis kam ntawm cov hlau, thiab nyob rau hauv tas li ntawd, muaj feem ntau me me nyob rau hauv cov hlau δ Yog li ntawd, kub workability ntawm ferrite uas muaj molybdenum stainless hlau yog phem dua li cov uas tsis yog molybdenum hlau, thiab qhov siab dua cov ntsiab lus molybdenum, qhov ua haujlwm kub kub. Tsis tas li ntawd, nws yog ib qho yooj yim uas tshwm sim nyob rau hauv molybdenum uas muaj austenitic stainless hlau κ ( σ ) theem nag lossis daus, uas yuav ua rau kom cov plasticity thiab toughness ntawm cov hlau tsis zoo. Yog li ntawd, thaum lub sij hawm tsim khoom, cov cuab yeej tsim khoom thiab kev siv cov molybdenum uas muaj austenitic stainless hlau, yuav tsum tau them nyiaj tshwj xeeb los tiv thaiv kev tsim cov theem ntawm intermetallic hauv cov hlau. Txawm hais tias yog vim li cas vim li cas molybdenum ua raws li cov hlau alloy tiv taus qhov nruab nrab ntawm austenitic stainless hlau, pitting corrosion thiab Crevice corrosion tsis meej, ntau qhov kev sim tau taw qhia tias qhov kev tiv thaiv corrosion ntawm molybdenum tsuas yog siv tau thaum nws yog. Sib npaug rau cov ntsiab lus siab ntawm chromium hauv cov hlau, Molybdenum feem ntau yog siv los ntxiv dag zog rau kev tiv thaiv corrosion ntawm chromium hauv hlau. Nyob rau tib lub sijhawm, cov nyhuv corrosion inhibition ntawm molybdenum tom qab tsim cov kua qaub ntsev kuj tau lees paub los ntawm kev sim. Nyob rau hauv cov nqe lus ntawm kev nyuaj siab corrosion kuj ntawm high concentration chloride tov, txawm hais tias yog vim li cas vim li cas molybdenum, raws li ib tug alloy caij, yog resistant rau txo nruab nrab ntawm austenitic stainless hlau, pitting corrosion thiab Crevice corrosion tsis yog kiag li meej, ib tug loj tus naj npawb ntawm kev sim tau taw qhia. tawm tias lub luag haujlwm ntawm molybdenum tsuas yog siv tau thaum cov hlau muaj cov chromium siab, Molybdenum feem ntau ntxiv dag zog rau kev tiv thaiv corrosion ntawm chromium hauv hlau. Tib lub sijhawm, cov nyhuv buffering ntawm molybdenum tom qab tsim Molybdate kuj tau lees paub los ntawm kev sim. Txawm hais tias qhov kev sim no hais txog kev ntxhov siab corrosion tsis kam ntawm siab concentration chloride sinking. Molybdenum hauv qab 3 # yog teeb meem rau kev ntxhov siab corrosion kuj ntawm austenitic stainless hlau. Txawm li cas los xij, vim yog siv cov chromium npib tsib xee austenitic stainless hlau hauv dej xov xwm uas muaj cov tshuaj chloride thiab saturated oxygen, nws cov kev ntxhov siab corrosion tshwm sim los ntawm cov ntsiab lus corrosion. Yog li ntawd, chromium nickel molybdenum austenitic stainless hlau uas muaj molybdenum feem ntau muaj kev tiv thaiv zoo rau cov tshuaj chloride kev nyuaj siab dua li cov hlau tsis muaj molybdenum nyob rau hauv cov ntaub ntawv siv vim nws siab tsis kam mus rau taw tes corrosion.