BEARING COMPONENT
A bearing part is a rolling element (13) used for a rocker arm bearing, a shaft (11) used for the rocker arm bearing, or a shaft (21) used for a planetary gear mechanism bearing. The bearing part includes a quench-hardened layer in a surface of the bearing part. The quench-hardened layer (15, 16, 24...
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| creator | YAMAUCHI, Kiyoshige YAMADA, Masahiro HARADA, Takamichi OHKI, Chikara |
| description | A bearing part is a rolling element (13) used for a rocker arm bearing, a shaft (11) used for the rocker arm bearing, or a shaft (21) used for a planetary gear mechanism bearing. The bearing part includes a quench-hardened layer in a surface of the bearing part. The quench-hardened layer (15, 16, 24) includes a plurality of martensite crystal grains. A ratio of a total area of the plurality of martensite crystal grains in the quench-hardened layer is more than or equal to 70%. The plurality of martensite crystal grains are classified into a first group and a second group. A minimum value of crystal grain sizes of the martensite crystal grains belonging to the first group is larger than a maximum value of crystal grain sizes of the martensite crystal grains belonging to the second group. A value obtained by dividing a total area of the martensite crystal grains belonging to the first group by the total area of the plurality of martensite crystal grains is more than or equal to 0.5. A value obtained by dividing, by the total area of the plurality of martensite crystal grains, a total area of the martensite crystal grains belonging to the first group except for a martensite crystal grain that has a minimum crystal grain size and that belongs to the first group is less than 0.5. |
| format | Patent |
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The bearing part includes a quench-hardened layer in a surface of the bearing part. The quench-hardened layer (15, 16, 24) includes a plurality of martensite crystal grains. A ratio of a total area of the plurality of martensite crystal grains in the quench-hardened layer is more than or equal to 70%. The plurality of martensite crystal grains are classified into a first group and a second group. A minimum value of crystal grain sizes of the martensite crystal grains belonging to the first group is larger than a maximum value of crystal grain sizes of the martensite crystal grains belonging to the second group. A value obtained by dividing a total area of the martensite crystal grains belonging to the first group by the total area of the plurality of martensite crystal grains is more than or equal to 0.5. A value obtained by dividing, by the total area of the plurality of martensite crystal grains, a total area of the martensite crystal grains belonging to the first group except for a martensite crystal grain that has a minimum crystal grain size and that belongs to the first group is less than 0.5.</description><language>eng ; fre ; ger</language><subject>BEARINGS ; BLASTING ; CHEMISTRY ; ELEMENTS OR CRANKSHAFT MECHANISMS ; ENGINEERING ELEMENTS AND UNITS ; FLEXIBLE SHAFTS ; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS ; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS ; HEATING ; LIGHTING ; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS ; MECHANICAL ENGINEERING ; METALLURGY ; METALLURGY OF IRON ; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS ; ROTARY BODIES OTHER THAN GEARING ELEMENTS ; SHAFTS ; THERMAL INSULATION IN GENERAL ; WEAPONS</subject><creationdate>2023</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=20231101&DB=EPODOC&CC=EP&NR=4039833A4$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20231101&DB=EPODOC&CC=EP&NR=4039833A4$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>YAMAUCHI, Kiyoshige</creatorcontrib><creatorcontrib>YAMADA, Masahiro</creatorcontrib><creatorcontrib>HARADA, Takamichi</creatorcontrib><creatorcontrib>OHKI, Chikara</creatorcontrib><title>BEARING COMPONENT</title><description>A bearing part is a rolling element (13) used for a rocker arm bearing, a shaft (11) used for the rocker arm bearing, or a shaft (21) used for a planetary gear mechanism bearing. The bearing part includes a quench-hardened layer in a surface of the bearing part. The quench-hardened layer (15, 16, 24) includes a plurality of martensite crystal grains. A ratio of a total area of the plurality of martensite crystal grains in the quench-hardened layer is more than or equal to 70%. The plurality of martensite crystal grains are classified into a first group and a second group. A minimum value of crystal grain sizes of the martensite crystal grains belonging to the first group is larger than a maximum value of crystal grain sizes of the martensite crystal grains belonging to the second group. A value obtained by dividing a total area of the martensite crystal grains belonging to the first group by the total area of the plurality of martensite crystal grains is more than or equal to 0.5. A value obtained by dividing, by the total area of the plurality of martensite crystal grains, a total area of the martensite crystal grains belonging to the first group except for a martensite crystal grain that has a minimum crystal grain size and that belongs to the first group is less than 0.5.</description><subject>BEARINGS</subject><subject>BLASTING</subject><subject>CHEMISTRY</subject><subject>ELEMENTS OR CRANKSHAFT MECHANISMS</subject><subject>ENGINEERING ELEMENTS AND UNITS</subject><subject>FLEXIBLE SHAFTS</subject><subject>GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS</subject><subject>GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS</subject><subject>HEATING</subject><subject>LIGHTING</subject><subject>MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS</subject><subject>MECHANICAL ENGINEERING</subject><subject>METALLURGY</subject><subject>METALLURGY OF IRON</subject><subject>MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS</subject><subject>ROTARY BODIES OTHER THAN GEARING ELEMENTS</subject><subject>SHAFTS</subject><subject>THERMAL INSULATION IN GENERAL</subject><subject>WEAPONS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2023</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZBB0cnUM8vRzV3D29w3w93P1C-FhYE1LzClO5YXS3AwKbq4hzh66qQX58anFBYnJqXmpJfGuASYGxpYWxsaOJsZEKAEA57UdbQ</recordid><startdate>20231101</startdate><enddate>20231101</enddate><creator>YAMAUCHI, Kiyoshige</creator><creator>YAMADA, Masahiro</creator><creator>HARADA, Takamichi</creator><creator>OHKI, Chikara</creator><scope>EVB</scope></search><sort><creationdate>20231101</creationdate><title>BEARING COMPONENT</title><author>YAMAUCHI, Kiyoshige ; YAMADA, Masahiro ; HARADA, Takamichi ; OHKI, Chikara</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP4039833A43</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</language><creationdate>2023</creationdate><topic>BEARINGS</topic><topic>BLASTING</topic><topic>CHEMISTRY</topic><topic>ELEMENTS OR CRANKSHAFT MECHANISMS</topic><topic>ENGINEERING ELEMENTS AND UNITS</topic><topic>FLEXIBLE SHAFTS</topic><topic>GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS</topic><topic>GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS</topic><topic>HEATING</topic><topic>LIGHTING</topic><topic>MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS</topic><topic>MECHANICAL ENGINEERING</topic><topic>METALLURGY</topic><topic>METALLURGY OF IRON</topic><topic>MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS</topic><topic>ROTARY BODIES OTHER THAN GEARING ELEMENTS</topic><topic>SHAFTS</topic><topic>THERMAL INSULATION IN GENERAL</topic><topic>WEAPONS</topic><toplevel>online_resources</toplevel><creatorcontrib>YAMAUCHI, Kiyoshige</creatorcontrib><creatorcontrib>YAMADA, Masahiro</creatorcontrib><creatorcontrib>HARADA, Takamichi</creatorcontrib><creatorcontrib>OHKI, Chikara</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>YAMAUCHI, Kiyoshige</au><au>YAMADA, Masahiro</au><au>HARADA, Takamichi</au><au>OHKI, Chikara</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>BEARING COMPONENT</title><date>2023-11-01</date><risdate>2023</risdate><abstract>A bearing part is a rolling element (13) used for a rocker arm bearing, a shaft (11) used for the rocker arm bearing, or a shaft (21) used for a planetary gear mechanism bearing. The bearing part includes a quench-hardened layer in a surface of the bearing part. The quench-hardened layer (15, 16, 24) includes a plurality of martensite crystal grains. A ratio of a total area of the plurality of martensite crystal grains in the quench-hardened layer is more than or equal to 70%. The plurality of martensite crystal grains are classified into a first group and a second group. A minimum value of crystal grain sizes of the martensite crystal grains belonging to the first group is larger than a maximum value of crystal grain sizes of the martensite crystal grains belonging to the second group. A value obtained by dividing a total area of the martensite crystal grains belonging to the first group by the total area of the plurality of martensite crystal grains is more than or equal to 0.5. A value obtained by dividing, by the total area of the plurality of martensite crystal grains, a total area of the martensite crystal grains belonging to the first group except for a martensite crystal grain that has a minimum crystal grain size and that belongs to the first group is less than 0.5.</abstract><oa>free_for_read</oa></addata></record> |
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| language | eng ; fre ; ger |
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| subjects | BEARINGS BLASTING CHEMISTRY ELEMENTS OR CRANKSHAFT MECHANISMS ENGINEERING ELEMENTS AND UNITS FLEXIBLE SHAFTS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MECHANICAL ENGINEERING METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS ROTARY BODIES OTHER THAN GEARING ELEMENTS SHAFTS THERMAL INSULATION IN GENERAL WEAPONS |
| title | BEARING COMPONENT |
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