Steel pipe for fuel injection line, and fuel injection line employing same

Provided is a steel pipe for a fuel injection line, having a chemical composition, expressed in weight percent, of C: 0.12-0.27%, Si: 0.05-0.40%, Mn: 0.3-2.0%, Al: 0.005-0.060%, N: 0.0020-0.0080%, Ti: 0.005-0.015%, Nb: 0.015-0.045%, Cr: 0-1.0%, Mo: 0-1.0%, Cu: 0-0.5%, Ni: 0-0.5%, V: 0-0.15%, and B:...

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Hauptverfasser: MAKINO TAIZO, YAMAZAKI TSUGUMI, MASUDA TATSUYA, NAGAO KATSUNORI, OKUYAMA TSUTOMU
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creator MAKINO TAIZO
YAMAZAKI TSUGUMI
MASUDA TATSUYA
NAGAO KATSUNORI
OKUYAMA TSUTOMU
description Provided is a steel pipe for a fuel injection line, having a chemical composition, expressed in weight percent, of C: 0.12-0.27%, Si: 0.05-0.40%, Mn: 0.3-2.0%, Al: 0.005-0.060%, N: 0.0020-0.0080%, Ti: 0.005-0.015%, Nb: 0.015-0.045%, Cr: 0-1.0%, Mo: 0-1.0%, Cu: 0-0.5%, Ni: 0-0.5%, V: 0-0.15%, and B: 0-0.005%, with the remainder being Fe and impurities. The content of Ca, P, S, and O among the impurities is Ca: 0.001% or less, P: 0.02% or less, S: 0.01% or less, and O: 0.0040% or less. The pipe has a metallographic structure comprising a tempered martensite structure or mixed structure of tempered martensite and tempered bainite, and has a prior austenite grain size number of 10.0 or above, and tensile strength TS of 800 MPa or above, as well as a critical internal pressure of at least [0.3*TS*alpha] (where alpha=[(D/d)2-1]/[0.776*(D/d)2], D: steel pipe outside diameter (mm), and d: steel pipe inside diameter (mm)). 种燃料喷射管用钢管,其化学组成以质量%计为C:0.12~0.27%、Si:0.05~0.40%、Mn:0.3~2.0%、Al:0.005~0.060%、N:0.0020~0.0080%、Ti:
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The content of Ca, P, S, and O among the impurities is Ca: 0.001% or less, P: 0.02% or less, S: 0.01% or less, and O: 0.0040% or less. The pipe has a metallographic structure comprising a tempered martensite structure or mixed structure of tempered martensite and tempered bainite, and has a prior austenite grain size number of 10.0 or above, and tensile strength TS of 800 MPa or above, as well as a critical internal pressure of at least [0.3*TS*alpha] (where alpha=[(D/d)2-1]/[0.776*(D/d)2], D: steel pipe outside diameter (mm), and d: steel pipe inside diameter (mm)). 种燃料喷射管用钢管,其化学组成以质量%计为C:0.12~0.27%、Si:0.05~0.40%、Mn:0.3~2.0%、Al:0.005~0.060%、N:0.0020~0.0080%、Ti:</abstract><oa>free_for_read</oa></addata></record>
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language chi ; eng
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source esp@cenet
subjects ALLOYS
BLASTING
CHEMISTRY
COMBUSTION ENGINES
FERROUS OR NON-FERROUS ALLOYS
GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS
HEATING
HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
LIGHTING
MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS
MECHANICAL ENGINEERING
METALLURGY
METALLURGY OF IRON
MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF
TREATMENT OF ALLOYS OR NON-FERROUS METALS
WEAPONS
title Steel pipe for fuel injection line, and fuel injection line employing same
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