Heat-resistant steel product hman tanna tur .
Heat-resistant steel tih hian steel temperature oxidation resistance sang leh temperature strength sang tak a kawk a ni. High temperature oxidation resistance hi a hnathawhna hmun pawimawh tak a ni a, chu chu workpiece chu temperature sang takah pawh rei tak a thawk thei a ni. Steel in high temperature air leh oxidizing environment dang, oxygen leh steel surface chemical reaction iron oxide layer chi hrang hrang siam chhuakin, oxide layer chu a lo chhuak nasa hle a, steel ziarang bulpui chu a hloh a, a tlak awlsam hle. Steel-a temperature sang tak oxidation resistance tihchangtlun nan chuan steel-ah hian alloying elements te dahin oxide structure a danglam thei a ni. Alloying element hman tlanglawn tak takte chu chromium, silicon, aluminum leh a dangte an ni. Oxygen nen an inrem a, dense leh stable oxide layer, emaw passivation layer CR2O3, SIO2 emaw AL2O3 emaw, steel chung lamah steel chu oxidation dang atanga venhim turin an siam a ni. Chromium, silicon leh aluminum tam zia an dah chuan steel-a temperature sang tak oxidation resistance a tha a, mahse silicon leh aluminum tam lutuk a nih chuan mechanical property leh processability a chhe zawk a ni. Chuvangin, heat-resistant steel chu chromium alloying element ber atan a hmang a, silicon leh aluminum chu auxiliary element atan a hmang a, a tawi zawngin, steel temperature sang tak oxidation resistance chu chemical composition nen chauh a inzawm a ni.
High temperature strength tih hian steel hian hun rei tak chhung temperature sang taka mechanical load a tuar theihna a kawk a ni. Temperature sang tak hnuaia mechanical load hnuaia steel chu a nem a, chu chu temperature a san chuan chakna a tlahniam tihna a ni. A pahnihna chu creep a ni a, chu chu constant stress action hnuaiah chuan plastic deformation awm zat chu hun rei tak a lo thlen chuan zawi zawiin a pung a, temperature sang taka steel plastic deformation chu intragranular slip leh grain boundary slip avanga lo awm a ni. Alloying method hi a tlangpuiin steel temperature sang tak siam that nan an hmang thin. Atom-te inkara inzawmna (binding force) siam \\hat nan leh pawl \\ha tak siam turin steel-ah alloying elements dah belh a ni bawk. Chromium, molybdenum, tungsten, vanadium, titanium, etc. te dah belh hian steel matrix a tichak thei a, recrystallization temperature a ti sang thei a, chubakah phase carbide emaw intermetallic compound tihchakna a siam thei bawk a, chu chu CR23C6, VC, TIC, etc. Heng chakna phase te hi temperature sang takah chuan a nghet lo a, an chak lo hle a, an lo thanglian lo a, an lo thang lian lo bawk. Nickel hi austenite hmuh theih nan a dah ber a ni. Ferrite nen khaikhin chuan austenite atom te chu a inhnaih hle a, atom te inkara inzawmna (binding force) chu a chak zawk a, atomic diffusion pawh a harsa zawk bawk. Chuvangin austenite temperature sang tak chu a tha zawk. Heat-resistant steel-a temperature strength sang tak hi chemical composition nen chauh ni lovin, pawl nen pawh a inzawm tih a hriat theih.
