THICK STEEL PLATE

THICK STEEL PLATE

To provide a thick steel plate with improved low-temperature toughness after a post-welding heat treatment, while suppressing a crack at the post-welding heat treatment.SOLUTION: A thick steel plate includes, by mass%, 0.080-0.170% C, 0.10-0.50% Si, 1.10-1.50% Mn, 0.020% or less P, 0.0050% or less S...

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Hauptverfasser: FURUYA HITOSHI, NAKAMURA YUTA, YOSHIMURA HITOHIDE, TAKAMINE FUMITOSHI, KAYAMORI YOICHI, KAGAYA TAKAYUKI
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Sprache:eng ; jpn
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ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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creator FURUYA HITOSHI
NAKAMURA YUTA
YOSHIMURA HITOHIDE
TAKAMINE FUMITOSHI
KAYAMORI YOICHI
KAGAYA TAKAYUKI
description To provide a thick steel plate with improved low-temperature toughness after a post-welding heat treatment, while suppressing a crack at the post-welding heat treatment.SOLUTION: A thick steel plate includes, by mass%, 0.080-0.170% C, 0.10-0.50% Si, 1.10-1.50% Mn, 0.020% or less P, 0.0050% or less S, 0.61-0.95% Ni, 0.10-0.90% Cr, 0.30-1.00% Mo, 0.005-0.050% V, 0.010-0.080% Al, 0.0010-0.0080% N, 0.0050% or less O, and a balance Fe with impurities. The thick steel plate has a chemical composition satisfying an expression 1 (in which each [symbol of element] denotes a content of each element.) and an average of the largest crystal grains up to 10th is 80 μm or less with regard to a circle equivalent diameter at a 1/4 position of a plate thickness from a surface thereof: 0.60≤VX≤1.90. Expression 1, VX=3.69-0.75×(2.7×[C]+0.4×[Si]+[Mn]+0.45×[Ni]+0.8×[Cr]+[Mo]).SELECTED DRAWING: None 【課題】溶接後熱処理後の低温靭性が改善され、溶接後熱処理時の割れが抑制される厚鋼板を提供する。【解決手段】質量％で、Ｃ：０．０８０～０．１７０％、Ｓｉ：０．１０～０．５０％、Ｍｎ：１．１０～１．５０％、Ｐ：０．０２０％以下、Ｓ：０．００５０％以下、Ｎｉ：０．６１～０．９５％、Ｃｒ：０．１０～０．９０％、Ｍｏ：０．３０～１．００％、Ｖ：０．００５～０．０５０％、Ａｌ：０．０１０～０．０８０％、Ｎ：０．００１０～０．００８０％、Ｏ：０．００５０％以下、残部：Ｆｅ及び不純物からなり、式１（各［元素記号］は各元素の含有量）を満たす化学組成を有し、表面から１／４板厚位置における結晶粒の円相当直径の上位１０個の平均が８０μｍ以下である厚鋼板。０．６０≦ＶＸ≦１．９０ ... 式１ＶＸ＝３．６９－０．７５×（２．７×［Ｃ］＋０．４×［Ｓｉ］＋［Ｍｎ］＋０．４５×［Ｎｉ］＋０．８×［Ｃｒ］＋［Ｍｏ］）【選択図】なし
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The thick steel plate has a chemical composition satisfying an expression 1 (in which each [symbol of element] denotes a content of each element.) and an average of the largest crystal grains up to 10th is 80 μm or less with regard to a circle equivalent diameter at a 1/4 position of a plate thickness from a surface thereof: 0.60≤VX≤1.90. Expression 1, VX=3.69-0.75×(2.7×[C]+0.4×[Si]+[Mn]+0.45×[Ni]+0.8×[Cr]+[Mo]).SELECTED DRAWING: None 【課題】溶接後熱処理後の低温靭性が改善され、溶接後熱処理時の割れが抑制される厚鋼板を提供する。【解決手段】質量％で、Ｃ：０．０８０～０．１７０％、Ｓｉ：０．１０～０．５０％、Ｍｎ：１．１０～１．５０％、Ｐ：０．０２０％以下、Ｓ：０．００５０％以下、Ｎｉ：０．６１～０．９５％、Ｃｒ：０．１０～０．９０％、Ｍｏ：０．３０～１．００％、Ｖ：０．００５～０．０５０％、Ａｌ：０．０１０～０．０８０％、Ｎ：０．００１０～０．００８０％、Ｏ：０．００５０％以下、残部：Ｆｅ及び不純物からなり、式１（各［元素記号］は各元素の含有量）を満たす化学組成を有し、表面から１／４板厚位置における結晶粒の円相当直径の上位１０個の平均が８０μｍ以下である厚鋼板。０．６０≦ＶＸ≦１．９０ ... 式１ＶＸ＝３．６９－０．７５×（２．７×［Ｃ］＋０．４×［Ｓｉ］＋［Ｍｎ］＋０．４５×［Ｎｉ］＋０．８×［Ｃｒ］＋［Ｍｏ］）【選択図】なし</description><language>eng ; jpn</language><subject>ALLOYS ; CHEMISTRY ; FERROUS OR NON-FERROUS ALLOYS ; METALLURGY ; TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><creationdate>2024</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&amp;date=20240117&amp;DB=EPODOC&amp;CC=JP&amp;NR=2024005022A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=20240117&amp;DB=EPODOC&amp;CC=JP&amp;NR=2024005022A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>FURUYA HITOSHI</creatorcontrib><creatorcontrib>NAKAMURA YUTA</creatorcontrib><creatorcontrib>YOSHIMURA HITOHIDE</creatorcontrib><creatorcontrib>TAKAMINE FUMITOSHI</creatorcontrib><creatorcontrib>KAYAMORI YOICHI</creatorcontrib><creatorcontrib>KAGAYA TAKAYUKI</creatorcontrib><title>THICK STEEL PLATE</title><description>To provide a thick steel plate with improved low-temperature toughness after a post-welding heat treatment, while suppressing a crack at the post-welding heat treatment.SOLUTION: A thick steel plate includes, by mass%, 0.080-0.170% C, 0.10-0.50% Si, 1.10-1.50% Mn, 0.020% or less P, 0.0050% or less S, 0.61-0.95% Ni, 0.10-0.90% Cr, 0.30-1.00% Mo, 0.005-0.050% V, 0.010-0.080% Al, 0.0010-0.0080% N, 0.0050% or less O, and a balance Fe with impurities. The thick steel plate has a chemical composition satisfying an expression 1 (in which each [symbol of element] denotes a content of each element.) and an average of the largest crystal grains up to 10th is 80 μm or less with regard to a circle equivalent diameter at a 1/4 position of a plate thickness from a surface thereof: 0.60≤VX≤1.90. Expression 1, VX=3.69-0.75×(2.7×[C]+0.4×[Si]+[Mn]+0.45×[Ni]+0.8×[Cr]+[Mo]).SELECTED DRAWING: None 【課題】溶接後熱処理後の低温靭性が改善され、溶接後熱処理時の割れが抑制される厚鋼板を提供する。【解決手段】質量％で、Ｃ：０．０８０～０．１７０％、Ｓｉ：０．１０～０．５０％、Ｍｎ：１．１０～１．５０％、Ｐ：０．０２０％以下、Ｓ：０．００５０％以下、Ｎｉ：０．６１～０．９５％、Ｃｒ：０．１０～０．９０％、Ｍｏ：０．３０～１．００％、Ｖ：０．００５～０．０５０％、Ａｌ：０．０１０～０．０８０％、Ｎ：０．００１０～０．００８０％、Ｏ：０．００５０％以下、残部：Ｆｅ及び不純物からなり、式１（各［元素記号］は各元素の含有量）を満たす化学組成を有し、表面から１／４板厚位置における結晶粒の円相当直径の上位１０個の平均が８０μｍ以下である厚鋼板。０．６０≦ＶＸ≦１．９０ ... 式１ＶＸ＝３．６９－０．７５×（２．７×［Ｃ］＋０．４×［Ｓｉ］＋［Ｍｎ］＋０．４５×［Ｎｉ］＋０．８×［Ｃｒ］＋［Ｍｏ］）【選択図】なし</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>2024</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZBAM8fB09lYIDnF19VEI8HEMceVhYE1LzClO5YXS3AxKbq4hzh66qQX58anFBYnJqXmpJfFeAUYGRiYGBqYGRkaOxkQpAgBJNx30</recordid><startdate>20240117</startdate><enddate>20240117</enddate><creator>FURUYA HITOSHI</creator><creator>NAKAMURA YUTA</creator><creator>YOSHIMURA HITOHIDE</creator><creator>TAKAMINE FUMITOSHI</creator><creator>KAYAMORI YOICHI</creator><creator>KAGAYA TAKAYUKI</creator><scope>EVB</scope></search><sort><creationdate>20240117</creationdate><title>THICK STEEL PLATE</title><author>FURUYA HITOSHI ; NAKAMURA YUTA ; YOSHIMURA HITOHIDE ; TAKAMINE FUMITOSHI ; KAYAMORI YOICHI ; KAGAYA TAKAYUKI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JP2024005022A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; jpn</language><creationdate>2024</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>FURUYA HITOSHI</creatorcontrib><creatorcontrib>NAKAMURA YUTA</creatorcontrib><creatorcontrib>YOSHIMURA HITOHIDE</creatorcontrib><creatorcontrib>TAKAMINE FUMITOSHI</creatorcontrib><creatorcontrib>KAYAMORI YOICHI</creatorcontrib><creatorcontrib>KAGAYA TAKAYUKI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>FURUYA HITOSHI</au><au>NAKAMURA YUTA</au><au>YOSHIMURA HITOHIDE</au><au>TAKAMINE FUMITOSHI</au><au>KAYAMORI YOICHI</au><au>KAGAYA TAKAYUKI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>THICK STEEL PLATE</title><date>2024-01-17</date><risdate>2024</risdate><abstract>To provide a thick steel plate with improved low-temperature toughness after a post-welding heat treatment, while suppressing a crack at the post-welding heat treatment.SOLUTION: A thick steel plate includes, by mass%, 0.080-0.170% C, 0.10-0.50% Si, 1.10-1.50% Mn, 0.020% or less P, 0.0050% or less S, 0.61-0.95% Ni, 0.10-0.90% Cr, 0.30-1.00% Mo, 0.005-0.050% V, 0.010-0.080% Al, 0.0010-0.0080% N, 0.0050% or less O, and a balance Fe with impurities. The thick steel plate has a chemical composition satisfying an expression 1 (in which each [symbol of element] denotes a content of each element.) and an average of the largest crystal grains up to 10th is 80 μm or less with regard to a circle equivalent diameter at a 1/4 position of a plate thickness from a surface thereof: 0.60≤VX≤1.90. Expression 1, VX=3.69-0.75×(2.7×[C]+0.4×[Si]+[Mn]+0.45×[Ni]+0.8×[Cr]+[Mo]).SELECTED DRAWING: None 【課題】溶接後熱処理後の低温靭性が改善され、溶接後熱処理時の割れが抑制される厚鋼板を提供する。【解決手段】質量％で、Ｃ：０．０８０～０．１７０％、Ｓｉ：０．１０～０．５０％、Ｍｎ：１．１０～１．５０％、Ｐ：０．０２０％以下、Ｓ：０．００５０％以下、Ｎｉ：０．６１～０．９５％、Ｃｒ：０．１０～０．９０％、Ｍｏ：０．３０～１．００％、Ｖ：０．００５～０．０５０％、Ａｌ：０．０１０～０．０８０％、Ｎ：０．００１０～０．００８０％、Ｏ：０．００５０％以下、残部：Ｆｅ及び不純物からなり、式１（各［元素記号］は各元素の含有量）を満たす化学組成を有し、表面から１／４板厚位置における結晶粒の円相当直径の上位１０個の平均が８０μｍ以下である厚鋼板。０．６０≦ＶＸ≦１．９０ ... 式１ＶＸ＝３．６９－０．７５×（２．７×［Ｃ］＋０．４×［Ｓｉ］＋［Ｍｎ］＋０．４５×［Ｎｉ］＋０．８×［Ｃｒ］＋［Ｍｏ］）【選択図】なし</abstract><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 THICK STEEL PLATE
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