4 340 steel
Cov Khoom Piav Qhia Cov khoom siv lub cev ntawm 4340 steel yog qhov tseem ceeb uas ua rau nws muaj ntau yam kev siv hauv ntau yam lag luam. Qhov ceev: Qhov ntom ntawm 4340 steel yog kwv yees li 7.85 grams ib cubic centimeter. Qhov no tseem ceeb tshaj plaws muab cov hlau ib qho ...
Hauj lwm lawm
Khoom Description
4340 Steel Chemical Composition
| Element | Cov ntsiab lus (%) |
|---|---|
| Hlau, Fe | 95.195 - 96.33 |
| Nickel, Nia | 1.65 - 2.00 |
| Chromium, Cr | 0.700 - 0.900 |
| Manganese, Mn | 0.600 - 0.800 |
| Carbon, C | 0.370 - 0.430 |
| Molybdenum, Mo | 0.200 - 0.300 |
| Silicon, Sib | 0.150 - 0.300 |
| Sulfur, S | 0.0400 |
| Phosphorus, P | 0.0350 |
Lub cev muaj zog
| Cov khoom | Metric | Imperial |
|---|---|---|
| Qhov ntom | 7.85 g / cm²3 | 0.284 lb/in³ |
| Melting point | 1427 degree | 2600 degree F |
Mechanical Properties
| Cov khoom | Metric | Imperial |
|---|---|---|
| Lub zog tensile | 745 MPa ua | 108 000 psi |
| Yield zog | 470 MPa rau | 68 200 psi |
| Bulk modulus (zoo rau cov hlau) | 140 GPa | 20 300 TZS |
| Shear modulus (zoo rau steel) | 80 gpa ua | 11 600 ksg |
| Elastic modulus | 190-210 GPa | 27557-30458 tsi |
| Poisson tus ratio | 0.27-0.30 | 0.27-0.30 |
| Elongation thaum so | 22% | 22% |
| Kev txo qis ntawm cheeb tsam | 50% | 50% |
| Hardness, Brinell | 217 | 217 |
| Hardness, Knoop (hloov los ntawm Brinell hardness) | 240 | 240 |
| Hardness, Rockwell B (hloov los ntawm Brinell hardness) | 95 | 95 |
| Hardness, Rockwell C (hloov los ntawm Brinell hardness. Tus nqi qis dua li HRC ntau yam, rau kev sib piv nkaus xwb) | 17 | 17 |
| Hardness, Vickers (hloov los ntawm Brinell hardness) | 228 | 228 |
| Machinability (annealed thiab txias drawn. Raws li 100 machinability rau AISI 1212 steel.) | 50 | 50 |
4340 steel muaj qhov melting point nyob ib ncig ntawm 1425 txog 1460 degrees Celsius. Qhov siab melting point no qhia tau hais tias cov hlau tuaj yeem tiv taus qhov kub thiab txias yam tsis muaj melting lossis poob nws cov qauv kev ncaj ncees. Hauv kev siv xws li cov txheej txheem kub kub lossis hauv kev tsim cov cav thiab turbines, lub peev xwm los tiv thaiv melting ntawm qhov kub siab yog qhov tseem ceeb. Lub melting point kuj cuam tshuam rau kev tsim cov txheej txheem ntawm 4340 steel, raws li nws txiav txim siab qhov kub thiab txias qhov xav tau rau melting, casting, thiab forging.
Thermal conductivity:
Lub thermal conductivity ntawm 4340 steel yog qhov tsawg dua piv rau lwm cov ntaub ntawv. Qhov no txhais tau hais tias nws tsis ua cua sov kom zoo. Txawm li cas los xij, cov cuab yeej no tuaj yeem ua tau zoo hauv qee cov ntawv thov uas xav tau kev rwb thaiv tsev lossis cua sov. Piv txwv li, hauv qee qhov kev siv kub kub, qhov thermal conductivity qis tuaj yeem pab tiv thaiv kom tsis txhob muaj cua sov ntau dhau thiab tswj qhov kub ntawm ib cheeb tsam. Ntawm qhov tod tes, nyob rau hauv cov ntawv thov uas kub dissipation yog ib qho tseem ceeb, yuav tsum tau ntxiv kev ntsuas los txhim kho cov thermal conductivity ntawm 4340 steel los yog siv cov ntaub ntawv uas siab dua thermal conductivity nyob rau hauv ua ke nrog nrog nws.
Hluav taws xob conductivity:
4340 steel muaj qhov nruab nrab hluav taws xob conductivity. Txawm hais tias nws tsis zoo li cov hlau xws li tooj liab lossis txhuas, nws tseem tuaj yeem ua hluav taws xob rau qee qhov. Cov cuab yeej no tuaj yeem cuam tshuam rau hauv cov ntawv thov uas cov hluav taws xob conductivity yog ib qho kev txiav txim siab, xws li hauv qee yam khoom siv hluav taws xob lossis hauv ib puag ncig uas yuav tsum tau tswj cov hluav taws xob electrostatic. Txawm li cas los xij, feem ntau, 4340 steel tsis yog feem ntau xaiv rau nws cov hluav taws xob conductivity tab sis rau nws cov khoom siv kho tshuab.
Magnetic Properties:
4340 steel yog cov khoom siv ferromagnetic, lub ntsiab lus nws tuaj yeem sib nqus. Cov cuab yeej no tuaj yeem muaj txiaj ntsig zoo hauv cov ntawv thov uas muaj kev sib nqus sib nqus, xws li hauv qee lub tshuab hluav taws xob lossis cov sib nqus sib nqus. Cov khoom sib nqus ntawm 4340 steel kuj tuaj yeem cuam tshuam rau nws tus cwj pwm hauv qee qhov kev tsim khoom, xws li kev tshuaj xyuas cov khoom sib nqus, uas yog siv los xyuas qhov chaw thiab subsurface defects hauv cov khoom.
Coefficient ntawm Thermal Expansion:
Lub coefficient ntawm thermal expansion ntawm 4340 steel yog ib qho kev ntsuas ntawm ntau npaum li cas cov khoom nthuav tawm los yog cog lus nrog kev hloov ntawm qhov kub thiab txias. Cov cuab yeej no tseem ceeb hauv cov ntawv thov uas cov khoom yuav raug cuam tshuam rau qhov kub thiab txias. Piv txwv li, nyob rau hauv kev tsim kho ntawm cov qauv loj lossis hauv kev tsim cov khoom siv kho tshuab uas ua haujlwm dhau ntawm qhov kub thiab txias, kev nkag siab txog cov coefficient ntawm thermal expansion yog qhov tseem ceeb los xyuas kom haum thiab ua haujlwm zoo. Yog tias cov coefficient ntawm thermal expansion siab dhau lawm, cov khoom yuav muaj kev ntxhov siab ntau dhau thiab deformation, ua rau muaj peev xwm ua tsis tiav.
Hauv kev xaus, cov khoom siv lub cev ntawm 4340 steel, suav nrog nws qhov ntom ntom, melting point, thermal thiab hluav taws xob conductivity, cov khoom sib nqus, thiab coefficient ntawm thermal expansion, ua lub luag haujlwm tseem ceeb hauv kev txiav txim siab nws tsim nyog rau ntau yam kev siv. Kev nkag siab txog cov khoom no tso cai rau cov kws tsim khoom thiab cov tuam txhab tsim cov kev txiav txim siab txog kev siv 4340 steel thiab tsim cov khoom lag luam thiab cov txheej txheem uas coj kom zoo dua ntawm nws cov yam ntxwv tshwj xeeb thaum txo qis qhov tsis zoo.
Cim npe nrov: 4340 steel, Tuam Tshoj 4340 steel lwm tus neeg, Hoobkas
