C71500 Qib yog dab tsi
C71500 yog UNS lub npe rau 70/30 tooj liab-nickel, tooj liab puag nrog 29-33% nickel thiab tswj cov hlau thiab manganese. Nws yog ib qho -theem alloy nrog lub ntsej muag-cented cubic qauv thiab nws yog qhov tseem ceeb uas tsis yog{10}}sib nqus, uas yog ib qho laj thawj uas nws yog siv rau hauv cov cuab yeej thiab cov khoom siv hauv hiav txwv nrog rau cov cua kub hloov raj. Nws tus cwj pwm siv tshuab ua raws li tus neeg paub txog tooj liab{11}} qauv alloy: lub zog los ntawm kev daws teeb meem hardening los ntawm npib tsib xee ntxiv rau txhua yam ua haujlwm txias ua rau lub siab npau taws, thiab ductility rov qab los ntawm annealing.
Cov kev cai siv tshuab yog li ntawd tsis tau hais rau cov hlau ib leeg. Lawv tau hais rau ib daim ntawv teev cov khoom lag luam thiab kev kub ntxhov, vim tias lub raj tsis muaj seamless rau ASTM B111 thiab ib qho nyuaj- rub pas nrig rau ASTM B151 ntawm tib lub alloy muaj cov khoom sib txawv heev.
Tensile, Yield thiab Elongation Requirements
| Qhov xwm txheej | Tensile zog | 0.5% offset yield zog | Elongation nyob rau hauv 50 mm |
|---|---|---|---|
| ASTM B111 (O61) Tube | 380 MPa (55 ksi) yam tsawg kawg nkaus | 140 MPa (20 ksi) yam tsawg kawg nkaus | 30% yam tsawg kawg nkaus |
| Lub teeb kos lub raj | Siab minima tshaj annealed, tabulated nyob rau hauv specification | Siab tshaj annealed, tabulated nyob rau hauv specification | Tsawg dua annealed, tabulated nyob rau hauv specification |
| Lub cev tawv | Siab tshaj tensile minima ntawm lub raj tempers | Siab tshaj tawm minima ntawm lub raj tempers | Tsawg elongation ntawm lub raj tempers |
| Hom annealed qhov tseem ceeb hauv kev tsim khoom | 380 - 450 MPa | 140 - 200 MPa | 30 - 40 % |
Ob lub rooj sib txoos tseem ceeb thaum nyeem daim ntawv pov thawj cupronickel. Thawj yog tias lub zog tawm los yog hais ntawm 0.5% offset rau tooj liab -nickel raj es tsis yog ntawm 0.2% offset siv rau hlau. Qhov thib ob yog tias tensile thiab yield minima rau annealed raj zaum zoo hauv qab cov txiaj ntsig tau txais hauv kev tsim khoom niaj hnub, yog li daim ntawv pov thawj pom cov npoo zoo li qub thiab tsis yog los ntawm nws tus kheej pov thawj ntawm kev tawm - qauv cua sov.
Hardness thiab Elastic Constants
Ib qho nyuaj rau annealed 70/30 raj nyob rau hauv thaj tsam ntawm 80-120 HB, nce raws li lub raj txias thiab txo qis dua tom qab annealing. Hardness yog ib qho tseem ceeb hauv khw-pem hauv ntej qhov taw qhia ntawm kev kub ntxhov, tab sis nws tsis yog qhov hloov pauv rau qhov kev sim tensile thaum ua raws li qhov yuav tsum tau ua.
| Khoom | Yam nqi |
|---|---|
| Elastic modulus | Txog 150 GPa |
| Shear modulus | Txog 52 GPa |
| Poisson ratio | Txog 0.34 |
| Qhov ntom | 8.94 g/m² |
| Melting ntau | Kwv yees li ntawm 1170 - 1240 degrees C |
| Thermal conductivity ntawm 20 ° C | Txog 29 W / (m·K) |
| Hluav taws xob conductivity | Kwv yees li 4.6% IACS |
Yuav ua li cas Temper thiab Temperature Hloov Cov Khoom
Kev txo qis qis yog tib txoj hauv kev los txhawb lub zog ntawm lub raj cupronickel tom qab nws tau annealed, thiab kev lag luam ncaj qha: txhua qhov kev nce siab ntawm kev sib tw nce siab tensile thiab tawm los lub zog thiab txo qis elongation. Lub raj npaj rau cov menyuam nthuav dav rau hauv cov ntawv raj feem ntau yog annealed, vim hais tias expansion yuav tsum tau ductility; ib lub raj npaj los tiv thaiv kev hnav hauv lub luag haujlwm slurry tuaj yeem muab nkag rau hauv qhov kub hnyiab uas qhov siab dua qhov tawv tawv yog tsim nyog poob ntawm formability. Qhov twg ua kom txias txias tau ua tiav, qhov kev ntxhov siab nyem anneal rov qab ductility thiab tshem tawm cov kev ntxhov siab seem uas yuav ua rau cov khoom tsis haum rau kev ntxhov siab corrosion cracking.
Thaum qhov kub thiab txias, tensile thiab yield zog poob tsis tu ncua thiab nkag los ua tus tsim kev xav; 70/30 tooj liab-nickel feem ntau yog siv hauv kev pabcuam txuas ntxiv ntawm qhov kub txog li 400 degrees C, nrog cov khoom txo qis thaum kub nce. Thaum qhov kub thiab txias, cov alloy khaws cia zoo toughness thiab yog siv rau cryogenic raj, vim nws tsis muaj ductile - mus rau - nkig hloov ntawm hom pom nyob rau hauv ferritic steels.
Kev xeem thiab lees paub pov thawj
Kev ua raws li cov cuab yeej ua tau pom los ntawm kev ntsuas nruj, ua rau tooj liab alloys raws li ASTM E8 thiab E8M, nrog rau qhov hardness ntsuas los ntawm Brinell txoj kev hauv qab ASTM E10 thaum yuav tsum muaj daim duab hardness. Tube rau ASTM B111 tseem raug rau kev sib tw thiab nthuav dav, uas yog tsim cov kev xeem es tsis yog cov cuab yeej xeem thiab siv los ua kom pom tias lub raj yuav muaj sia nyob rau kev ua haujlwm ntawm cov khoom siv sib dhos. Dimensional checks, ib tug hydrostatic los yog pneumatic siab test raws li tau txiav txim, thiab eddy-tam sim no kev ntsuam xyuas rau Practice E243 ua kom tiav cov kev txais ib txwm pob.
Tus neeg yuav khoom los tshuaj xyuas daim ntawv pov thawj zeb yuav tsum xyuas tias cov alloy raug txheeb xyuas raws li UNS C71500, tias qhov kub thiab txias yog qhov kev txiav txim, qhov tensile, yield thiab elongation qhov tseem ceeb yog nyob rau ntawm qhov tseeb ntawm qhov minima, uas tus nqi tawm los yog teev ntawm 0.5 % offset, thiab cov khoom siv tau zoo sib xws rau cov txiaj ntsig zoo ib yam {2}.
FAQ
Q: Lub zog tensile ntawm C71500 yog dab tsi?
Annealed raj rau ASTM B111 yuav tsum ncav cuag yam tsawg 380 MPa (55 ksi); Cov nqi tsim khoom ib txwm muaj yog 380-450 MPa, thiab cov cua txias txias tau teev nrog qhov tsawg dua.
Q: Lub zog tawm los yuav tsum tau xav li cas?
Qhov tshwj xeeb yam tsawg kawg nkaus rau cov raj annealed yog 140 MPa (20 ksi) ntawm 0.5 % offset, nrog rau cov nqi tsim tawm hauv thaj tsam 140-200 MPa. Copper-nickel tube yields yog hais ntawm 0.5% offset es tsis yog 0.2%.
Q: C71500 nyuaj npaum li cas?
Annealed 70/30 raj feem ntau yog hais txog 80-120 HB. Hardness nce nrog txias txo thiab ntog dua tom qab annealing, yog li nws yog ib qho tseem ceeb khw qhia ntawm temper es tsis yog ib qho kev hloov rau kev ntsuam xyuas nruj.
Q: Dab tsi yog qhov elastic modulus ntawm cov hlau?
Lub elastic modulus yog hais txog 150 GPa nrog lub shear modulus nyob ze 52 GPa thiab Poisson piv ntawm txog 0.34.
Q: C71500 tuaj yeem siv tau li cas?
Kev pabcuam txuas ntxiv mus txog kwv yees li 400 ° C yog qhov qub rau qib 70/30, tab sis tensile thiab yield zog txo qis thaum kub nce thiab nkag los ua tus tswj kev tsim qauv ntawm qhov kawg ntawm qhov ntau.
Q: Cov kev ntsuam xyuas twg qhia tau tias muaj kev ua raws li cov neeg kho tshuab?
Kev ntsuas nruj rau ASTM E8 thiab E8M muab qhov tensile, yield thiab elongation qhov tseem ceeb, hardness thaum xav tau yog ntsuas los ntawm Brinell txoj kev rau ASTM E10, thiab raj rau ASTM B111 yog ntxiv rau flattening thiab expansion tests.
