4140 DOM tubingyog ib tug precision seamless steel raj tsim los ntawm nruab nrab -carbon chromium- molybdenum alloy steel (AISI 4140) siv cov txheej txheem "Drawn Over Mandrel" (DOM). Cov txheej txheem DOM yields tubing nrog tshwj xeeb cov phab ntsa tuab, du sab hauv thiab sab nrauv, thiab microstructure tsis muaj kev ntxhov siab sab hauv.
Nyob rau hauv kev siv tswv yim, 4140 DOM tubing yog dav siv nyob rau hauv ntau yam xav tau txhua yam tshuab, xws li hydraulic thooj voos kheej kheej, automotive kev ua tau zoo Cheebtsam, industrial machinery, thiab cov khoom siv roj thiab roj.
4140 DOM Tubing Txheej txheem cej luam
Alloy Composition thiab DOM txheej txheem
4140 yog ib qho nruab nrab -carbon chromium- molybdenum alloy hlau raws li AISI / SAE cov qauv, muaj kwv yees li 0.40% carbon, 1.0% chromium, thiab 0.20% molybdenum. Chromium ntxiv dag zog rau ferritic matrix thiab txhim kho oxidation tsis kam, thaum molybdenum txhim khu kev tiv thaiv kom softening ntawm qhov kub thiab txias, ua kom muaj zog, ua kom loj - ntu ntu kom ua tiav cov qauv martensitic.
| Element | C | Mn | Si | Cr | Mo | S | P | Fe |
|---|---|---|---|---|---|---|---|---|
| Cov ntsiab lus (%) | 0.38–0.43 | 0.75–1.00 | 0.15–0.35 | 0.80–1.10 | 0.15–0.25 | Tsawg dua lossis sib npaug li 0.040 | Tsawg dua lossis sib npaug li 0.035 | Tshuav |
DOM (Drawn Over Mandrel) yog cov txheej txheem tsim cov raj xa dej. Cov txheej txheem ntau lawm yog dov ib txoj hlua hlau rau hauv lub raj thiab ua haujlwmhluav taws xob kuj welding(ERW), ua raws litxias- kos lub raj weldedlos ntawm ib tug tuag thiab tshaj ib tug mandrel. Cov txheej txheem no zoo tshem tawm cov weld seams sab hauv, txhim kho qhov tseeb ntawm qhov tseeb thiab qhov sib npaug, thiab txhim kho cov neeg kho tshuab lub zog los ntawm kev ua haujlwm tawv. Cov txheej txheem DOM ua rau muaj qhov zoo tshaj plaws hauv qhov chaw tiav thiab cov phab ntsa tuab zoo sib xws, tso lub hauv paus rau kev ua haujlwm tom qab precision thiab siab - kev siv siab.
Cov khoom tseem ceeb thiab cov txiaj ntsig
Ua tsaug rau nws cov alloy muaj pes tsawg leeg thiab txias- cov txheej txheem ua haujlwm, 4140 DOM steel tubing muab cov txiaj ntsig zoo thiab kev ua tau zoo tshaj plaws rau cov qauv carbon steel tubing.
- Siab zog thiab hardness: Tom qab quench-thiab- kev kho kub, cov khoom ua tiav lub zog tensile siab tshaj 1080 MPa thiab lub zog tawm los tshaj 930 MPa, ua rau nws tiv taus huab cua zoo li qub thiab cuam tshuam.
- Zoo heev hnav thiab qaug zog tiv taus: Chromium-molybdenum alloying cov ntsiab lus muab kev hnav zoo heev, thaum cov nplej ua kom zoo los ntawm qhov txias- txheej txheem kos duab ua kom lub neej qaug zog, ua rau cov khoom zoo tagnrho rau kev siv lub voj voog.
- Superior dimensional precision thiab nto zoo: Cov txheej txheem DOM ua kom nruj puab sab hauv- txoj kab uas hla ntawm qhov ntev, lub ntsej muag du tsis muaj vuam seams, thiab siab concentricity, tsim cov xwm txheej zoo rau hydraulic sealing thiab precision- haum daim ntawv thov.
- Zoo Hardenability thiab Machinability: Hardness thiab toughness tuaj yeem hloov kho los ntawm kev kho cua sov xws li quenching thiab tempering; cov khoom siv kuj muaj cov machinability zoo, yooj yim rau kev tsim thiab sib dhos ua haujlwm.
4140 DOM Tubing Applications
Hydraulic Lub tog raj kheej
4140 DOM tubing yog dav siv nyob rau hauv hnyav -lub tog raj kheej hydraulic rau kev tsim kho thiab kev ua liaj ua teb machinery. Nws cov bore nyob rau hauv du yuav txo tau lub foob hnav thiab feem ntau tshem tawm qhov xav tau rau honing, thaum lub chromium -molybdenum steel muaj pes tsawg leeg muab lub zog siab uas yuav tsum tau los tiv thaiv siab tshaj 300 bar.
Feem ntau siv nyob rau hauv crane boom cylinders thiab bulldozer lifting systems, cov hlab no muaj peev xwm undergo chrome los yog npib tsib xee plating los ntxiv txhim khu kev hnav thiab corrosion kuj, yog li ncua kev pab cuam lub neej.
Automotive thiab Aerospace Parts
4140 DOM tubing yog siv nyob rau hauv lub teeb yuag, siab - lub zog Cheebtsam xws li tsav shafts, steering systems, suspension caj npab, thiab aircraft tsaws iav actuators. quenching thiab tempering cia meej tswj ntawm hardness kom ua tiav qhov yuav tsum tau sib npaug ntawm torsional rigidity thiab cuam tshuam tsis kam.
Hauv kev lag luam tsheb, cov raj no feem ntau yog siv los tsim cov khoom tseem ceeb- cov kabmob xws li cov ncej tsav, lub tes tsho, lub kauj hlua khi, thiab caj npab ncua kev kawm. Nyob rau hauv aerospace teb, nws yog siv nyob rau hauv tsaws iav Cheebtsam, hydraulic system piping, thiab cav auxiliary structural Cheebtsam.
Hnyav Machinery
4140 DOM tubing tuav zoo heev thais toughness ntawm qhov kub thiab txias -tiv thaiv brittle fracture- thiab muaj kev weldability zoo. Nws yog dav siv rau cov khoom siv thiab pin bushings hauv kev tsim kho tshuab xws li excavators, cranes, thiab loaders.
Cov khoom siv no feem ntau siv rau bushings thiab kev txhawb nqa hlab ntawm cov ntsiab lus tseem ceeb pivot ntawm booms thiab sticks; nws lub siab hnav tsis kam thiab lub zog compressive ua rau nws tuaj yeem tiv taus rov ua dua pivoting txav thiab hnyav -load compression.
Roj & Roj Cheebtsam
Cov roj thiab cov roj rho tawm suav nrog qhov nyuaj thiab hnyav ib puag ncig uas cov khoom siv downhole yuav tsum tiv thaiv kev sib tw ua ke ntawm kev kub siab, corrosion, thiab cyclic loading. Thaum quenched thiab tempered kom ua tau raws li NACE MR0175 tus qauv, 4140 DOM steel tubing tuaj yeem ua haujlwm zoo hauv cov roj qaub thiab roj ib puag ncig.
Cov raj no feem ntau yog siv rau cov cuab yeej downhole sib dhos, shafts rau cov khoom siv drilling, siab - cov tshuab xa dej siab, lub cev valve, thiab cov vaj tsev actuator.
Xaus
4140 DOM tubing yog qhov siab -kev ua tau zoo alloy steel khoom uas sib txuas lub zog muaj zog ntawm4140 chromium{1}}molybdenum hlaunrog rau qhov tseeb thiab kev ua kom zoo dua qub tau them los ntawm DOM (Drawn Over Mandrel) kev tsim khoom. Nws muaj kev sib xyaw ua ke ntawm lub zog siab, siab hardness, thiab zoo heev hnav thiab qaug zog tiv thaiv, nrog rau qhov zoo tshaj qhov tseeb, nto tiav, thiab concentricity.
Los ntawm precision sealing fits nyob rau hauv hydraulic thooj voos kheej kheej rau lub teeb yuag, thauj khoom -cov kabmob cov khoom siv hauv tsheb thiab aerospace-thiab los ntawm hnyav- cov qauv hauv kev tsim kho tshuab mus rau qhov tseem ceeb hauv cov khoom hauv cov roj thiab cov roj rho tawm- cov tubing no ua lub luag haujlwm tseem ceeb hauv ntau yam kev xav tau ntawm cov khoom lag luam tshwj xeeb thiab cov nqi tsim nyog,