Mi nih an ruah tawnmi cuvalvestainless thir in sermi a si i a rawk lai lo. A si ahcun, thir he aa pehtlaimi buainak a si kho men. Mah cu thil sining cheukhat tangah a rawk khomi thir kong hngalhthiam lonak kongah khatlei kap in ruahnak palh a si.
Stainless thir nih thli nih a chuahpimi oxidation kha a doh khawh—cucu, vutcam doh khawhnak a si, cun acid, alkalis le chiti aa telmi media ah rawk khawhnak zong a ngei—cucu, rawkralnak doh khawhnak a si. Sihmanhsehlaw, a rawhnak doh khawhnak a ngan ning cu a thir hrimhrim i a chemical fonhmi, kilvennak dirhmun, hmannak dirhmun le pawngkam thilri phun he aa thleng.
Stainless steel cu a tlangpi in hitihin tthen a si:
A tlangpi in, thir suaisam ning in, thir thir sawhsawh cu phun thum ah tthen a si: austenitic thir, ferritic thir, le martensitic thir. Hi a hrampi metallographic sining pathum cung ah hram bunh in, a hleiin herhmi le tinhmi caah, dual-phase thir, ruahsurnak ah a harmi thir le thir 50% tluk a tlawmmi high-alloy thir pawl kha an chuah.
1. Austenitic thir.
Matrix cu austenite sining (CY phase) nih a uk i a hmai ah a ummi cubic crystal sining, magnetic a si lo, cun a bik in a kikmi riantuannak (cun magnetic sining cheukhat a chuahter khomi) stainless steel nih a fehter. American Thir le Thir Institute cu 200 le 300 series chung i nambar in min an sak, cu hna cu 304 an si.
2. Ferritic thir.
Matrix cu ferrite sining ((a phase) pum-a laifang cubic crystal sining nih a uk, cucu magnetic a si i a tlangpi in lumternak in a har kho lo, asinain lumternak in tlawmpal in a fehter khawh. American Thir le Thir Institute cu 430 le 446 in hmelchunh a si.
3. Martensitic thir.
Matrix cu martensitic sining (pum-a hngatmi cubic asiloah cubic) a si, magnetic a si, cun a riantuan ning hna cu lumternak in remh khawh a si. American Iron and Steel Institute cu nambar 410, 420 le 440 in min an sak. Martensite cu a lum tukmi ah austenite sining a ngei, cun aa tlakmi tluk in khaan lumnak tiang a lumter tikah, austenite sining cu martensite (cucu, a harmi) ah aa thleng kho.
4. Austenitic-ferritic (duplex) thir.
Matrix cu austenite le ferrite tthen hnih a ngei, cun tthen tlawm deuh matrix chung i a ummi cu a tlangpi in 15% nak tam deuh a si. Magnetic a si i a kik in riantuannak in thazaang pek khawh a si. 329 cu a tlangpi in duplex stainless thir a si. Austenitic stainless thir he tahchunh ahcun, dual-phase thir cu thazaang sang a ngei, cun intergranular rawhnak le chloride fahnak rawhnak le pitting rawhnak doh khawhnak cu a ttha ngaingai.
5. Ruah nih a hartermi thir.
Matrix cu austenite asiloah martensitic sining a si i ruahsurnak in a harter khawh. American Iron and Steel Institute cu 600 series nambar in hmelchunh a si, cu bantuk cu 630, cucu 17-4PH a si.
A tlangpi in chim ahcun, cawhmi thilri hna lengah, austenitic stainless thir nih a hrawh khawhnak cu a ttha ngai. A rawk lonak pawngkam ah, ferritic stainless thir hman khawh a si. A rawkmi pawngkam ah, thilri cu a fekmi asiloah a harmi a si a herh ahcun, martensitic stainless steel le ruahsurnak in a harmi stainless steel hman khawh a si.
A tlangpi in hmanmi thir phun le sining hna
01 304 Stainless Steel
A tam bik hmanmi le tam bik hmanmi austenitic stainless thir pakhat a si. A thukmi thilri le acid pipeline, thilri chiahnak, thilri sernak thilri, thilri phunphun, tbk. sernak caah aa tlak. Cun magnetic a si lomi, lumnak tlawmmi thilri le thilri sernak caah hman khawh a si.
02 304L Stainless Steel
Cr23C6 a tlak ruangah a chuakmi ultra-low carbon austenitic stainless thir kong he pehtlai in buainak tawlrel khawhnak dingah, thil sining cheukhat tangah 304 stainless thir cu a fakmi intergranular rawhnak a chuahter, a sensitivity state intergranular corrosion doh khawhnak cu 304 stainless steel nakin a ttha deuh ngaingai. A tlawm deuhmi thazaang ti lo ahcun, a dang thilri hna cu 321 stainless thir he aa khat. A bik in rawkralnak a tei khomi thilri le thilri pawl caah hman a si i, hnimhnak hnu ah thlennak tuah khawh a si lo, cun thilri phunphun sernak caah hman khawh a si.
03 304H Stainless Steel
304 stainless steel chunglei zung nih 0.04%-0.10% carbon mass fraction a ngei, cun a lum tukmi riantuannak cu 304 stainless steel nakin a ttha deuh.
04 316 Stainless Steel
10Cr18Ni12 thir cung ah molybdenum chapnak nih thir cu a tlawmternak le a tlawmternak ah a ttha ngaimi a doh khawhnak a siter. Rili ti le a dang media phunphun ah, rawkralnak doh khawhnak cu 304 stainless thir nakin a tha deuh, a bik in a rawk kho lomi thilri caah hmanmi a si.
05 316L Stainless Steel
Carbon tlawm tukmi thir cu a ttha ngaimi intergranular rawhnak a doh khawh i a chahmi tthencheunak a ngeimi thilri le thilri sernak caah aa tlak, cu bantuk cu petrochemical thilri ah rawkralnak a tei khomi thilri hna an si.
06 316H Stainless Steel
316 stainless steel chunglei zung nih 0.04%-0.10% carbon mass fraction a ngei, cun a lum tukmi riantuannak cu 316 stainless steel nakin a ttha deuh.
07 317 Stainless Steel
Petrochemical le organic acid rawkralnak a doh khomi thilri sernak ah hmanmi 316L stainless steel nakin pitting rawkralnak doh khawhnak le tliknak doh khawhnak cu a tha deuh.
08 321 Stainless Steel
Titanium-stabilized austenitic stainless steel, titanium chap in intergranular corrosion doh khawhnak a tthanchoter, cun a ttha ngaimi high-temperature mechanical properties a ngeih caah, ultra-low carbon austenitic stainless steel in thlen khawh a si. A lum tukmi asiloah hydrogen rawhnak a doh khomi caan hleice ti lo ahcun, hman ding in ruahnak cheuh a si lo.
09 347 Stainless Steel
Niobium-stabilized austenitic stainless steel, niobium chap in intergranular corrosion resistance tthanchoter, acid, alkali, chiti le a dang corrosive media ah corrosion dohnak cu 321 stainless steel he aa khat, a ttha mi welding tuah khawhnak, corrosion-resistant thilri le anti-corrosion ah hman khawh a si. thilri chiahnak kuang, pipe, lumnak i thlengtu, hri, meiphu chung i meikhu chuahnak hri, le meikhu chuahnak hri thermometers sernak tibantuk hna an si.
10 904L Stainless Steel
Super complete austenitic stainless steel cu Finland ram OUTOKUMPU nih a sermi super austenitic stainless thir phunkhat a si. , Sulfuric acid, acetic acid, formic acid le phosphoric acid tibantuk oxidizing a si lomi acid ah rawkralnak a doh khawhnak a ttha, cun a tthencheunak rawhnak le stress rawhnak doh khawhnak zong a ngei. Sulfuric acid 70 tang a phunphun caah aa tlak°C, cun acetic acid le formic acid le acetic acid cawhmi acid ah a ttha mi rawkralnak a ngei.
11 440C thir thir
Martensitic thir cu a harmi thir le thir hna lakah a har bikmi a si, a harnak cu HRC57 a si. A bik in nozzle, bearings,pelepvalve cores,pelepvalve tthutdan, angki ban,valve hnah, tbk.
12 17-4PH thir thir
Martensitic precipitation hardening stainless steel cu HRC44 a harmi a si i a fekmi, a harmi le a rawkmi a doh khomi a si i 300 cung lumnak ah hman khawh a si lo°C. Thli le acid asiloah chiti cawhmi ah rawkralnak a doh khawhnak a ttha. A rawhnak doh khawhnak cu 304 thir le 430 thir he aa khat. Rili cung hmunhma, turbine hri,pelepvalve (valve cores, valve seats, sleeves, valve stems) wait.
In valve suaisamnak le thimnak, thir thir phunphun, tthencheunak le tthencheunak hna cu kan ton tawn hna. Thim tikah, buainak cu hmuhning phunphun in ruah a hau, cu hna cu a hleiin tuahsernak thilri, lum le kih, hneknak, a fahtermi thilri, rawkralnak le man tibantuk an si.
Post caan: Jul-20-2022
