HIGH STRENGTH BAINITIC STEEL RAIL EXCELLENT IN DAMAGING RESISTANCE

PROBLEM TO BE SOLVED: To increase the rolling fatigue resistance of a rail, to prolong its service life and to reduce the cost of the maintenance in a track by specifying the compsn. of a rail steel and regulating its compsn. after heat treatment and the hardness of the rail head part. SOLUTION: Thi...

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Hauptverfasser:	YAMAMOTO SADAHIRO, FUJIKAKE MASAHISA, KOBAYASHI KAZUTAKA
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY TREATMENT OF ALLOYS OR NON-FERROUS METALS
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creator	YAMAMOTO SADAHIRO FUJIKAKE MASAHISA KOBAYASHI KAZUTAKA
description	PROBLEM TO BE SOLVED: To increase the rolling fatigue resistance of a rail, to prolong its service life and to reduce the cost of the maintenance in a track by specifying the compsn. of a rail steel and regulating its compsn. after heat treatment and the hardness of the rail head part. SOLUTION: This rail has a compsn. contg., by weight, 0.2 to 0.5% C, 0.1 to 2.0% Si, 0.3 to 4.0% Mn, =10 by Vickers hardness.
format	Patent
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SOLUTION: This rail has a compsn. contg., by weight, 0.2 to 0.5% C, 0.1 to 2.0% Si, 0.3 to 4.0% Mn, <=0.035% P, <=0.035% S, 0.3 to 4.0% Cr, and the balance substantially Fe. Furthermore, its microstructure is formed of a bainitic one, and the hardness of the rail head part, head side part and the position distant from the center of the head tip part by 20mm in the width direction is regulated to >=420 by Vickers Hv. Furthermore, the hardness of the center of the head tip part is lower than the hardness of the position distant by 20 mm in the width direction from the center of the head tip part by 10 to 70 by Vickers hardness, the hardness distribution therebetween monotonously increases, and the difference between the hardness obtd. by interpolating the space therebetween by a straight line and the surveyed hardness is regulated to >=10 by Vickers hardness.</description><edition>6</edition><language>eng</language><subject>ALLOYS ; CHEMISTRY ; FERROUS OR NON-FERROUS ALLOYS ; METALLURGY ; TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><creationdate>1997</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19970318&DB=EPODOC&CC=JP&NR=H0971844A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25543,76293</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19970318&DB=EPODOC&CC=JP&NR=H0971844A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>YAMAMOTO SADAHIRO</creatorcontrib><creatorcontrib>FUJIKAKE MASAHISA</creatorcontrib><creatorcontrib>KOBAYASHI KAZUTAKA</creatorcontrib><title>HIGH STRENGTH BAINITIC STEEL RAIL EXCELLENT IN DAMAGING RESISTANCE</title><description>PROBLEM TO BE SOLVED: To increase the rolling fatigue resistance of a rail, to prolong its service life and to reduce the cost of the maintenance in a track by specifying the compsn. of a rail steel and regulating its compsn. after heat treatment and the hardness of the rail head part. SOLUTION: This rail has a compsn. contg., by weight, 0.2 to 0.5% C, 0.1 to 2.0% Si, 0.3 to 4.0% Mn, <=0.035% P, <=0.035% S, 0.3 to 4.0% Cr, and the balance substantially Fe. Furthermore, its microstructure is formed of a bainitic one, and the hardness of the rail head part, head side part and the position distant from the center of the head tip part by 20mm in the width direction is regulated to >=420 by Vickers Hv. Furthermore, the hardness of the center of the head tip part is lower than the hardness of the position distant by 20 mm in the width direction from the center of the head tip part by 10 to 70 by Vickers hardness, the hardness distribution therebetween monotonously increases, and the difference between the hardness obtd. by interpolating the space therebetween by a straight line and the surveyed hardness is regulated to >=10 by Vickers hardness.</description><subject>ALLOYS</subject><subject>CHEMISTRY</subject><subject>FERROUS OR NON-FERROUS ALLOYS</subject><subject>METALLURGY</subject><subject>TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1997</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZHDy8HT3UAgOCXL1cw_xUHBy9PTzDPF0Boq4uvooBDl6-ii4Rji7-vi4-oUoePopuDj6Orp7-rkrBLkGewaHOPo5u_IwsKYl5hSn8kJpbgYFN9cQZw_d1IL8-NTigsTk1LzUknivAA8DS3NDCxMTR2MilAAAnw4q5g</recordid><startdate>19970318</startdate><enddate>19970318</enddate><creator>YAMAMOTO SADAHIRO</creator><creator>FUJIKAKE MASAHISA</creator><creator>KOBAYASHI KAZUTAKA</creator><scope>EVB</scope></search><sort><creationdate>19970318</creationdate><title>HIGH STRENGTH BAINITIC STEEL RAIL EXCELLENT IN DAMAGING RESISTANCE</title><author>YAMAMOTO SADAHIRO ; FUJIKAKE MASAHISA ; KOBAYASHI KAZUTAKA</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPH0971844A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1997</creationdate><topic>ALLOYS</topic><topic>CHEMISTRY</topic><topic>FERROUS OR NON-FERROUS ALLOYS</topic><topic>METALLURGY</topic><topic>TREATMENT OF ALLOYS OR NON-FERROUS METALS</topic><toplevel>online_resources</toplevel><creatorcontrib>YAMAMOTO SADAHIRO</creatorcontrib><creatorcontrib>FUJIKAKE MASAHISA</creatorcontrib><creatorcontrib>KOBAYASHI KAZUTAKA</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>YAMAMOTO SADAHIRO</au><au>FUJIKAKE MASAHISA</au><au>KOBAYASHI KAZUTAKA</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>HIGH STRENGTH BAINITIC STEEL RAIL EXCELLENT IN DAMAGING RESISTANCE</title><date>1997-03-18</date><risdate>1997</risdate><abstract>PROBLEM TO BE SOLVED: To increase the rolling fatigue resistance of a rail, to prolong its service life and to reduce the cost of the maintenance in a track by specifying the compsn. of a rail steel and regulating its compsn. after heat treatment and the hardness of the rail head part. SOLUTION: This rail has a compsn. contg., by weight, 0.2 to 0.5% C, 0.1 to 2.0% Si, 0.3 to 4.0% Mn, <=0.035% P, <=0.035% S, 0.3 to 4.0% Cr, and the balance substantially Fe. Furthermore, its microstructure is formed of a bainitic one, and the hardness of the rail head part, head side part and the position distant from the center of the head tip part by 20mm in the width direction is regulated to >=420 by Vickers Hv. Furthermore, the hardness of the center of the head tip part is lower than the hardness of the position distant by 20 mm in the width direction from the center of the head tip part by 10 to 70 by Vickers hardness, the hardness distribution therebetween monotonously increases, and the difference between the hardness obtd. by interpolating the space therebetween by a straight line and the surveyed hardness is regulated to >=10 by Vickers hardness.</abstract><edition>6</edition><oa>free_for_read</oa></addata></record>
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subjects	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY TREATMENT OF ALLOYS OR NON-FERROUS METALS
title	HIGH STRENGTH BAINITIC STEEL RAIL EXCELLENT IN DAMAGING RESISTANCE
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