2011A1774

BL19B2࣮࢜ࢫࢸࢼ࢖ࢺ⣔ࢫࢸࣥࣞࢫ㗰 SUS316L 〇⁐᥋㓄⟶⥅ᡭࡢ〇㐀㐣⛬࡟࠾ࡅࡿᛂຊ࣭⤌⧊ኚ໬Stress and Microstructure during manufacturing process for Welded Pipe
Joint of Austenitic Stainless Steel 316L
ᶫᮏ ໷ྐ a, ఀཎ ᾴᖹ a, ᙇ ᭾※ b, ᇛ Ṍ⨾ b, Ⳮⵦ ᩗஂ b, ᮃ᭶ ṇே aTadafumi Hashimotoa, Ryohei Iharaa, Syouyuan Zhang b, Ayumi Shirob,Takahisa Syobub, Masahito Mochizukiaa኱㜰኱Ꮫ኱Ꮫ㝔ᕤᏛ◊✲⛉࣐ࢸࣜ࢔ࣝ⏕⏘⛉Ꮫᑓᨷb᪥ᮏཎᏊຊ◊✲㛤ⓎᶵᵓaGraduate School of Engineering, Osaka University.
bJapan Atomic Energy Agency.

࣮࢜ࢫࢸࢼ࢖ࢺ⣔ࢫࢸࣥࣞࢫ㗰㓄⟶⁐᥋㒊࡛Ⓨ⏕ࡍࡿᛂຊ⭉㣗๭ࢀࢆ㜵Ṇࡍࡿࡓࡵ㸪ᐇ㝿ࡢ㓄⟶⁐᥋⥅ᡭࡢ〇㐀ᕤ⛬㸦ษ๐㸩⁐᥋㸧࡟࠾ࡅࡿṧ␃ᛂຊኚ໬ࢆ㏣㊧ࡋࡓ㸬๭ࢀࡣ⾲㠃㏆ഐࡢෆ㒊ṧ␃ᛂຊࢆ㥑ືຊ࡜ࡋ࡚㐍ᒎࡍࡿࡓࡵ㸪ṧ␃ᛂຊࡣ㧗࢚ࢿࣝࢠ࣮ᨺᑕගࢆ⏝࠸ࡓ౵ධ῝ࡉ୍ᐃἲ࡛㹼70m ࡲ࡛ࢆホ౯ࡋࡓ㸬ࡑࡢ⤖ᯝ㸪ᬻᐃⓗ࡛ࡣ࠶ࡿࡀษ๐ࡢࡳ࡟ẚࡋ࡚ษ๐㸩⁐᥋࡛ࡣ⾲㠃ࡢᘬᙇṧ␃ᛂຊࡀ㔜␚࡟ࡼࡾᴟ➃࡟ቑຍࡍࡿࡇ࡜ࢆㄆࡵࡓ㸬࣮࣮࢟࣡ࢻ㸸 ษ๐㸪⁐᥋㸪෇࿘⁐᥋⥅ᡭ㸪ṧ␃ᛂຊ㸪౵ධ῝ࡉ୍ᐃἲ㸪XRD⫼ᬒ࡜┠ⓗ㸸㏆ᖺ㸪࢚ࢿࣝࢠ࣮㟂せࡢቑຍ࡞ࡽࡧ࡟⎔ቃၥ㢟ࡢほⅬ࠿ࡽཎᏊຊⓎ㟁࡟ὀ┠ࡀ㞟ࡲࡗ࡚࠸ࡿ㸬ࡋ࠿ࡋ࡞ࡀࡽ㸪᪤ᏑࡢཎᏊຊⓎ㟁ࣉࣛࣥࢺࡣ㧗⤒ᖺ໬ၥ㢟ࢆᢪ࠼㸪࣮࢜ࢫࢸࢼ࢖ࢺ⣔ࢫࢸࣥࣞࢫ㗰〇෌ᚠ⎔⣔㓄⟶⁐᥋⇕ᙳ㡪㒊࡟࠾࠸࡚ᛂຊ⭉㣗๭ࢀ㻔SCC㻕ࡀ㢧ᅾ໬ࡋ࡚࠸ࡿ㸬ࡇࢀࡽ SCC ࡢ᳨ᰝ㸪⿵ಟ࡟ࡣከ኱࡞᫬㛫ࢆせࡍࡿࡇ࡜࠿ࡽ㸪ຠ⋡ⓗ࡟࢚ࢿࣝࢠ࣮ࢆ౪⤥ࡍࡿ࡟ࡣ㸪SCC Ⓨ⏕ཎᅉࡢゎ᫂ࡀᚲせ୙ྍḞ࡛࠶ࡿ㸬୍⯡ⓗ࡟ᛂຊ⭉㣗๭ࢀࡣ⎔ቃ㸪ᮦᩱ㸪ຊᏛⓗせᅉࡢ㔜␚࡟ࡼࡾⓎ⏕㸪㐍ᒎࡍࡿ࡜ࡉࢀ࡚࠸ࡿࡀ㸪ཎᏊຊᵓ㐀≀࡛౑⏝ࡉࢀࡿ SUS316L 㗰ࡣ㠀㗦ᩄ໬ᮦࡢࡓࡵ㸪ຊᏛⓗせᅉ࡛࠶ࡿ⁐᥋ᘬᙇṧ␃ᛂຊ࡟ὀ┠ࡀ㞟ࡲࡗ࡚࠸ࡿ㸬୍᪉࡛㸪ࢢࣛ࢖ࣥࢲ࣮࠾ࡼࡧษ๐ࡢࡼ࠺࡞ᶵ
Ეຍᕤࡢࡳ࡛ࡶᅽຊᐜჾ⅔ෆቨ࡟࠾࠸࡚ SCC ࡀ⏕ࡌࡿ࡜ࡢሗ࿌[1]ࡶ࠶ࡾ㸪⁐᥋㓄⟶⥅ᡭࡢ〇㐀ᕤ⛬ࡀ⁐᥋๓ࡢෆᚄྜࢃࡏ࡟ษ๐ຍᕤࢆ᪋ࡋ࡚࠸ࡿࡇ࡜࠿ࡽ㸪ࡑࢀࡽ〇㐀ᕤ⛬㸦ษ๐㸩⁐᥋㸧࡟࠾ࡅࡿᛂຊ࣭⤌⧊ኚ໬ࢆ㏣㊧ࡍࡿࡇ࡜ࡀ SCC ࡢⓎ⏕࣭㐍ᒎ㜵Ṇ࡟᭷┈࡜࡞ࡿྍ⬟ᛶࡀ࠶ࡿ㸬㏻ᖖࡣỗ⏝ࡢ X ⥺ᅇᢡ⿦⨨࡛㟁ゎ◊☻࡜ 2-sin2 ἲࡢే⏝࡟ࡼࡾ㏲ḟ◊☻ἲࡀ⏝࠸ࡽࢀ࡚࠸ࡿࡀ㸪῝ࡉ᪉ྥࡢᛂຊ໙㓄࡟ࡼࡾ 2-sin2 ⥺ᅗ࡟㠀⥺ᙧ≉ᛶࡀ⌧ࢀࡿࡇ࡜㸪ᑦୟࡘ㠀◚ቯ࡛ᐃฟ᮶࡞࠸ࡇ࡜ࡀၥ㢟࡜࡞ࡿ㸬ࡲࡓ㸪SCC ࡣᴟ⾲ᒙ࡛Ⓨ⏕ࡋ㸪ෆ㒊ᛂຊ㻔㹼100m㻕࡟ࡼࡾ㐍ᒎࡍࡿࡇ࡜࠿ࡽ㧗✵㛫ศゎ⬟࡛ᴟ⾲ᒙ࠾ࡼࡧෆ㒊ࢆヲ⣽࡟ᐃࡍࡿᚲせࡀ࠶ࡿ㸬ࡋ࠿ࡋ࡞ࡀࡽ㸪࡞ᛂຊ໙㓄ࡀⓎ⏕ࡋ࡚࠸ࡿࡓࡵ㸪ᚤᑠ࡞୍ᐃࢤ࣮ࢪయ✚࠿ࡽࡢ᝟ሗࢆィᐃᑐ㇟㡿ᇦࡣᛴᓧࡋ㸪ෆ㒊ࡲ࡛ X ⥺ࢆ౵ධࡉࡏ࡞ࡅࢀࡤ࡞ࡽ࡞࠸㸬ࡑࢀࡽࢆ㐩ᡂࡍࡿ࡟ࡣ㧗✵㛫ศゎ⬟࡛ᙉᗘࢆ☜ಖ࡛ࡁࡿ㧗㍤ᗘ X ⥺ࡀ୙ྍḞ࡛࠶ࡿ㸬ࡑࡋ࡚㸪ษ๐࡞ࡽࡧ࡟⁐᥋ࡢ㔜ࡡྜࢃࡏṧ␃ᛂຊศᕸࢆᐃࡋ㸪᪥ᮏᶵᲔᏛ఍ࡢ⥔ᣢつ᱁࡟࠾࠸࡚ᐃࡵࡽࢀࡓࡁ⿣㐍ᒎゎᯒࢆ⾜࠺ࡇ࡜࡟ࡼࡾ㸪SCC ࡢࡁ⿣Ⓨ⏕࣭㐍ᒎࢆホ౯ࡋ㸪ヲ⣽࡞ᑑ࿨ணࡀᮇᚅ࡛ࡁࡿ㸬ࡲࡓ㸪ᡃࠎࡀᵓ⠏ࡋࡓษ๐࡞ࡽࡧ࡟⁐᥋ṧ␃ᛂຊゎᯒᡭἲࡢ⢭ᗘࢆྥୖ࡛ࡁࢀࡤ㸪ᶵᲔຍᕤ᮲௳࣭⁐᥋᮲௳ࡢ⤌ࡳྜࢃࡏ࠿ࡽ SCC ࡟ᑐࡋ࡚㕌࠸⁐᥋㓄⟶⥅ᡭ〇㐀ᕤ⛬ࢆᥦ᱌࡛ࡁࡿྍ⬟ᛶࡀ࠶ࡿ㸬ᐇ㦂᪉ἲ㸸 ᮏ◊✲࡛ࡣ࣮࢜ࢫࢸࢼ࢖ࢺ⣔ࢫࢸࣥࣞࢫ㗰 SUS316L ࢆ౪ヨᮦᩱ࡜ࡋ࡚⏝࠸ࡿ㸬⣲ᮦ⮬㌟ࡢṧ␃ᛂຊࢆ㝖ཤࡍࡿࡓࡵ࡟ 1373K ࡛⇕ฎ⌮ࢆ⾜ࡗࡓᚋ㸪ᑍἲ 150x100x8mmt ࡢヨ㦂య࡟ຍᕤࡋࡓ㸬ࡑࡋ࡚㸪ᐇᶵ┦ᙜࡢษ๐ຍᕤࢆ⾲㠃࡟⾜ࡗࡓ㸬ࡑࡢヨ㦂య࡟ᑐࡋ࡚ TIG ⇕※ࢆ⏝࠸ࡓࣅ࣮ࢻ࢜ࣥࣉ࣮ࣞࢺ⁐᥋ࡋ㸪ᐇ⁐᥋㓄⟶⥅ᡭࡢ〇㐀㐣⛬ࢆᶍᨃࡋࡓ㸬ࡲࡓ㸪ษ๐ࡢࡳࡢᙳ㡪ࢆ☜ㄆࡍࡿࡓࡵษ๐ࡲࡲࡶేࡏ࡚⏝ពࡋࡓ㸬ࡍ࡞ࢃࡕ㸪ᛂຊᐃࡣษ๐ࡲࡲ㸪ษ๐+⁐᥋ࡢ 2 ヨ㦂య࡛࠶ࡿ㸬ᮏ◊✲

ࡣゅᗘศᩓἲ࡟ࡼࡿ౵ධ῝ࡉ୍ᐃἲ[2]࡛

ᐃࡋࡓ㸬X ⥺ࢆ 50m ௨ୖ౵ධࡉࡏࡿ࡟ࡣ 72keV ⛬ᗘࡢ࢚ࢿࣝࢠ࣮ࡀᚲせ࡛࠶ࡿ㸬పゅධᑕ࡟ࡼࡾ῝ࡉ᪉ྥศゎ⬟ࢆྥୖ࡛ࡁ㸪᪉఩ࣃ࣓࣮ࣛࢱ࠿ࡽࣂ
ࣝࢡࡢᙎረᛶᣲື࡟㏆࠸࡜ண

ࡉࢀࡿ 531 ཯ᑕࢆ฼⏝ࡋࡓ㸬ᮏ◊✲࡟࠾ࡅࡿࡾ࡛࠶ࡾ㸪ษ๐㸦⁐᥋㸧᪉ྥࡢᛂຊᡂศࢆᖹ㠃ᛂຊ≧ែࡢ௬ᐃࡢࡶ࡜

ᐃ᮲௳ࡣ௨ୗࡢ㏻

ᐃࡋࡓ㸬ࡲࡓ X ⥺ⓗᙎᛶᐃᩘࡣ࣐ࢩࣥࢱ࢖࣒ࡢไ㝈࠿ࡽ Kroner ࣔࢹࣝ࡟ࡼࡾ⟬ฟࡋࡓ㸬
1㻕࢚ࢿࣝࢠ࣮㸸72keV㸦CeO2 ࡛ࡢᵓᡂ࡟ࡼࡾ 71.457keV ࡜☜ㄆ㸧2㻕᳨ฟჾ㸸CdTe diode3㻕ࢫࣜࢵࢺ㸸ධᑕഃ/2.0x0.3mm2 㸸ཷගഃ/ࢯ࣮࣮ࣛࢫࣜࢵࢺ, 3.0x2.0mm24㻕ᅇᢡ㠃㸸5315㻕ᩓ஘ゅ㸸16.55deg6)ᦂື㸸ヨ㦂యࡢ㛗ᡭ᪉ྥ㸦⁐᥋ヨ㦂య࡛ࡣ⁐᥋⥺᪉ྥ㸧࡟ᑐࡋ࡚±4mm ࡛ 2  ᚟⤖ᯝ࠾ࡼࡧ⪃ᐹ㸸 2-sin2 ⥺ᅗࡢ୍౛ࢆ Fig. 1 ࡟♧ࡍ㸬໙㓄ࡣ࣐࢖ࢼࢫࢆ࡜ࡿࡓࡵ౵ධ῝ࡉෆ࡟࠾࠸࡚ᘬᙇṧ␃ᛂຊࡀᏑᅾࡍࡿ࡜ࢃ࠿ࡿࡀ㸪ഹ࠿࡞ࡀࡽ㠀⥺ᙧᣲືࢆ♧ࡋ࡚࠸ࡿ㸬ࡇࢀࡣ㸪ษ๐࡟ࡼࡾ୍᪉ྥ࡟ረᛶኚᙧࡀ⏕ࡌࡓࡓࡵ㸪㞟ྜ⤌⧊ࢆྵࡴྍ⬟ᛶࡀ⪃࠼ࡽࢀࡿࡀ㸪ᙉ㓄ྥ࡛ࡣ࡞࠸ࡓࡵ➼᪉ᆒ㉁ᮦᩱ
ࢆ௬ᐃࡋ࡚ゎᯒࡍࡿࡇ࡜࡟ࡋࡓ㸬ࡑࡢ⤖ᯝࢆ Fig. 2 ࡟♧ࡍ㸬ษ๐ࡲࡲࡢヨ㦂యࡣ⾲㠃࡛㠀ᖖ࡟㐣኱࡞ᘬᙇṧ␃ᛂຊࡀᏑᅾࡋ࡚࠾ࡾ㸪ෆ㒊࡟ྥ࠿ࡗ࡚ᅽ⦰໬ࡋ࡚࠸ࡃᵝ┦ࡀᐃ࡛ࡁࡓ㸬୍᪉㸪ษ๐ᚋ࡟⁐᥋ࡋࡓヨ㦂య࡛ࡣண᝿࡟཯ࡋ࡚⾲㠃㏆ഐࡣṧ␃ᛂຊࡀᏑᅾࡏࡎ㸪ෆ㒊࡟ྥ࠿ࡗ࡚ᘬᙇ࡟㌿ࡌࡿ⤖ᯝ࡜࡞ࡗࡓ㸬ࡑࡢせᅉ࡜ࡋ࡚ Fig. 3 ࡟♧ࡍᅇᢡᙉᗘ᭤⥺ࡢ㠀ᑐ⛠ᛶࡀ⪃࠼ࡽࢀࡿ㸬 ゅࢆ☜ಖࡍࡿ㝿࡟౵ධ῝ࡉࢆไᚚࡍࡿࡓࡵ㸪ධᑕゅࡢ࠶࠾ࡾࢆຍ࠼ࡿࡀ㸪ࡑࢀ࡟క࠸⁐᥋㔠ᒓࡢవ┒ࡾ࡟ X ⥺ࡢග㊰ࢆ㐽ࡽࢀࡓ⤖ᯝ㸪పゅഃ࡟ࣈࣛ࢖ࣥࢻࡀⓎ⏕ࡍࡿ㸬ࡑࡢ⤖ᯝ㸪ࣆ࣮ࢡࣇ࢕ࢵࢸ࢕ࣥࢢ࡟ࡼࡾᚓࡽࢀࡿᅇᢡゅ 2 ࡀ┿ᐇࡼࡾࡶ㧗ゅഃ࡟㑄⛣ࡍࡿࡓࡵ㸪ษ๐㸩⁐᥋ヨ㦂యࡢ⾲㠃࡟㏆࠸ṧ␃ᛂຊ್ࡀᅽ⦰໬ࡉࢀࡓࡶࡢ࡜ࢃ࠿ࡿ㸬ࡍ࡞ࢃࡕ㸪౵ධ῝ࡉࡀ࠶ࡿ⛬ᗘ῝ࡃ࡞ࡿ࡟క࠸ࡑࡢᙳ㡪ࡀ㍍ῶࡉࢀࡿࡇ࡜࠿ࡽ㸪౵ධ῝ࡉ 60m ࡢࡳษ๐࡜⁐᥋ࡢ㔜␚ຠᯝࢆṇ☜࡟ᤊ࠼࡚࠸ࡿ࡜᥎ᐹࡍࡿ㸬౵ධ῝ࡉ 60m ࡟࠾ࡅࡿ஧Ỉ‽ࢆẚ㍑ࡍࡿ࡜㸪ษ๐ࡲࡲ࡟ẚ࡭࡚ษ๐㸩⁐᥋ヨ㦂య࡛ࡣṧ␃ᛂຊࡢ㔜␚ຠᯝ࡟ࡼࡗ࡚ᘬᙇഃ࡟㑄⛣ࡍࡿࡇ࡜ࡀほᐹࡉࢀࡓ㸬ࡼࡗ࡚㸪⁐᥋๓࡟㓄⟶ࡢෆᚄㄪᩚࢆ┠ⓗ࡜ࡋࡓษ๐ࡀ⁐᥋ṧ␃ᛂຊ࡜㔜␚ࡍࡿࡇ࡜࡟ࡼࡗ࡚㸪ᛂຊ⭉㣗๭ࢀࡢⓎ⏕ࢆಁ㐍ࡋ㸪ࡑࡢᚋࡢఏ᧛㏿ᗘࢆ㏿ࡵࡿ࡜⪃࠼ࡽࢀࡿ㸬ࡋ࠿ࡋ࡞ࡀࡽ㸪࠶ࡃࡲ࡛ࡶᬻᐃⓗ࡞ࡶࡢ࡛࠶ࡾ㸪௒ᚋࡢ෌ᐃࡀᚲせ࡛࠶ࡿ㸬Fig. 1 ౵ධẚ 0.5 ࡟࠾ࡅࡿษ๐ヨ㦂యࡢ

Fig. 2 〇㐀ᕤ⛬ࡢ㔜␚࡟ࡼࡿṧ␃ᛂຊศᕸኚ໬

2-sin2 ⥺ᅗFig. 3 ᅇᢡᙉᗘ᭤⥺ࡢ㠀ᑐ⛠ᛶ௒ᚋࡢㄢ㢟㸸⁐᥋㒊࡟࠾ࡅࡿ✀ࠎࡢ◚ቯ஦㇟ࡣ⁐᥋㔠ᒓ࡞ࡽࡧ࡟⇕ᙳ㡪㒊࡛⏕ࡌࡿࡓࡵ㸪⾲㠃ࡢพฝࡢᙳ㡪ࢆ⪃៖ࡋ࡚㸪⾲㠃㏆ഐࢆ෌ᐃࢆᐇ᪋ࡍࡿᚲせࡀ࠶ࡿ㸬ࡲࡓ㸪࣮࢜ࢫࢸࢼ࢖ࢺ⣔ࢫࢸࣥࣞࢫ㗰ࡣ⢒኱⢏ࢆ᭷ࡍࡿࡇ࡜࠿ࡽ㸪౵ධ῝ࡉࢆࡲࡍ࡟ࡘࢀ࡚ᅇᢡᙉᗘ᭤⥺࡟ᙎᛶ␗᪉ᛶࡀᙳ㡪ࡍࡿࡓࡵ㸪ከ㍈ᦂື㸦ࡓ࡜࠼ࡤȰᦂື࡜ྠ᫬࡟ XY ᦂື㸧࡜ࡑࢀ࡟క࠺ᩓ஘࣋ࢡࢺࣝࡢㄪᩚ㸦 ㍈࡜୍⮴ࡍࡿࡼ࠺࡟㸧ࡀ௒ᚋࡢㄢ㢟࡛࠶ࡿ㸬ཧ⪃ᩥ⊩㸸[1] R.Ihara, J.Katsuyama, K.Onizawa, T.Hashimoto, Y.Mikami and M.Mochizuki, Pediction of ResidualStress Distributions due to Surface Machining and Welding and Crack Growth Simulation under
Residual Stress Distribution, Nuclear Engineering and Design, Vol. 241, pp. 1335-1344, 2011.
[2]Y.Akiniwa, Y.Kojima, H.Kimura and K.Maruko, “Prediction of Residual Stress Distribution in Severe
Surface Deformed Steel by Constant Penetration Depth Method,” Transactions of the Japan Society ofMechanical Engineers, Vol.57, pp.660-660 㻔2008㻕. 㻔in Japanese㻕