AISI 4340H hlau

Cov ntaub ntawv tseem ceeb ntawm AISI 4340H Steel yog raws li hauv qab no:

• Cov Qauv: Cov qauv siv yog ASTM A29/A29M-04.

• Tshuaj muaj pes tsawg leeg:

• Cov pa roj carbon (C): Cov ntsiab lus sib txawv ntawm {{0}}.38% mus rau 0.43%.

• Silicon (Si): 0.15% - 0.35%.

• Manganese (Mn): 0.60% - 0.80%.

• Phosphorus (P): Max 0.025%.

• Sulfur (S): Max 0.035%.

• Nickel (Ni): 1.65% - 2 00%.

• Chromium (Cr): 0.70% - 0.90%.

• Molybdenum (Mo): 0.20% - 0.30%.

• Mechanical Properties:

• Tensile zog: 980 - 1172 MPa.

• Yield zog: 835 - 965 MPa.

• Elongation: 12% - 14%.

• Txo thaj tsam: 45% - 55%.

• Hardness: 285 - 341 HBW.

 

 

Kev tsim cov txheej txheem ntawm AISI 4340H hlau

Kev tsim cov txheej txheem ntawm AISI 4340H steel yog ib qho nyuaj thiab tswj tau ntau theem ntawm cov kauj ruam uas lub hom phiaj los tsim cov khoom siv nrog cov cuab yeej zoo thiab microstructure kom tau raws li qhov xav tau ntawm ntau yam kev siv.

Cov txheej txheem pib nrog kev xaiv cov khoom zoo raw khoom. Cov no feem ntau muaj xws li hlau ore, coke, thiab ntau yam alloying ntsiab xws li npib tsib xee, chromium, thiab molybdenum, uas tau ntxiv rau hauv cov proportions tshwj xeeb kom ua tiav cov tshuaj muaj pes tsawg leeg ntawm AISI 4340H hlau.

Thawj kauj ruam tseem ceeb yog cov txheej txheem steelmaking, uas tuaj yeem nqa tau los ntawm kev siv lub tshuab pa oxygen yooj yim (BOF) lossis hluav taws xob arc rauv (EAF) txoj kev. Nyob rau hauv cov txheej txheem BOF, lub moj tej tawg ntawm oxygen yog tshuab mus rau hauv lub molten hlau kom tshem tawm impurities thiab kho cov ntsiab lus carbon. Txoj kev EAF, ntawm qhov tod tes, siv lub zog hluav taws xob los yaj cov nqi thiab ua kom cov hlau zoo dua.

Thaum cov hlau tau melted thiab refined, nws yog poured rau hauv pwm los ua ingots los yog nruam nrum rau hauv slabs. Cov txheej txheem casting yog ua tib zoo tswj xyuas kom muaj ib qho microstructure zoo ib yam thiab txo qhov tsis xws luag.

Tom qab casting, cov hlau tau txais kev kho cua sov homogenization kom tshem tawm ib qho kev sib txawv ntawm cov khoom siv. Qhov no yuav pab ua kom cov khoom sib xws thoob plaws hauv cov khoom kawg.

Cov kauj ruam tseem ceeb tom ntej yog kev ua haujlwm kub, uas feem ntau cuam tshuam nrog kub dov lossis forging. Kub dov txo cov thickness ntawm cov slabs los yog ingots thiab refines lub grain qauv ntawm cov hlau, txhim kho nws cov khoom siv kho mob. Forging yog siv los ua cov hlau rau hauv cov geometry nyuaj thaum tseem txhim kho nws lub zog thiab ductility.

Tom qab kub ua hauj lwm, cov hlau yog raug rau ib tug quenching txheej txheem. Qhov no suav nrog ceev ceev cov hlau los ntawm immersing nws nyob rau hauv ib tug coolant, xws li dej los yog roj. Qhov txias txias sai ua rau muaj kev hloov pauv martensitic hauv microstructure, ua rau muaj zog thiab hardness.

Quenching feem ntau ua raws li tempering, txheej txheem kev kho cua sov ua haujlwm ntawm qhov kub qis. Tempering pab txo cov brittleness tshwm sim los ntawm quenching thiab txhim kho lub toughness thiab ductility ntawm cov hlau thaum tuav nws hardness thiab lub zog.

Thoob plaws hauv cov txheej txheem tsim khoom, kev tswj xyuas nruj nruj yog siv. Tshuaj ntsuam xyuas yog ua nyob rau hauv ntau theem kom ntseeg tau tias muaj pes tsawg leeg ua raws li cov qauv teev tseg. Kev ntsuam xyuas tshuab, suav nrog kev ntsuas tensile, kuaj hardness, thiab kev sim cuam tshuam, yog ua los xyuas cov khoom siv ntawm cov hlau.

Cov kev kuaj tsis muaj kev puas tsuaj, xws li kev kuaj ultrasonic thiab kev soj ntsuam cov khoom sib nqus, kuj yog ua haujlwm los kuaj xyuas cov teeb meem sab hauv lossis saum npoo ntawm cov hlau.

Cov txheej txheem kev kho deg tuaj yeem raug siv los txhim kho cov kev tiv thaiv corrosion los yog cov tsos ntawm cov khoom kawg. Qhov no tuaj yeem suav nrog cov txheej txheem xws li plating, txheej, lossis polishing.

Ntxiv rau cov txheej txheem tsim khoom ib txwm muaj, cov thev naus laus zis zoo xws li hmoov hlau metallurgy thiab kev tsim khoom ntxiv kuj tseem raug tshawb nrhiav thiab siv hauv kev tsim cov AISI 4340H steel kom ua tiav ntau qhov tseeb thiab nyuaj geometries, nrog rau cov khoom siv kho kom zoo.

Cov theem kawg ntawm kev tsim cov txheej txheem suav nrog kev txiav, machining, thiab ua tiav cov khoom siv hlau kom tau raws li qhov tshwj xeeb xav tau rau lawv cov ntawv thov. Qhov no tuaj yeem koom nrog kev ua haujlwm xws li tig, milling, sib tsoo, thiab drilling.

Hauv kev xaus, cov txheej txheem tsim khoom ntawm AISI 4340H steel yog kev sib xyaw ua ke ntawm kev tshawb fawb metallurgical, cov txheej txheem ua tiav, thiab kev tswj xyuas kom zoo. Txhua kauj ruam ua lub luag haujlwm tseem ceeb hauv kev txiav txim siab qhov kawg ntawm cov khoom thiab kev ua haujlwm ntawm cov hlau, ua rau nws muaj txiaj ntsig zoo thiab muaj txiaj ntsig zoo rau ntau yam kev siv hauv kev lag luam. Kev tshawb fawb tsis tu ncua thiab kev txhim kho hauv daim teb no yog niaj hnub siv zog los txhim kho cov txheej txheem tsim khoom thiab ua kom zoo dua cov khoom ntawm AISI 4340H hlau kom tau raws li qhov xav tau ntawm niaj hnub engineering thiab kev tsim khoom.

Cim npe nrov: aisi 4340h steel, Tuam Tshoj aisi 4340h steel lwm tus neeg, hoobkas