JP2024029843A - オーステナイト系ステンレス鋼造形物の製造方法 - Google Patents
オーステナイト系ステンレス鋼造形物の製造方法 Download PDFInfo
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- JP2024029843A JP2024029843A JP2022132253A JP2022132253A JP2024029843A JP 2024029843 A JP2024029843 A JP 2024029843A JP 2022132253 A JP2022132253 A JP 2022132253A JP 2022132253 A JP2022132253 A JP 2022132253A JP 2024029843 A JP2024029843 A JP 2024029843A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 41
- 229910001566 austenite Inorganic materials 0.000 title claims abstract description 31
- 229910001220 stainless steel Inorganic materials 0.000 title abstract description 10
- 239000010935 stainless steel Substances 0.000 title abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 82
- 239000002994 raw material Substances 0.000 claims abstract description 53
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 32
- 239000000654 additive Substances 0.000 claims abstract description 22
- 230000000996 additive effect Effects 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims description 23
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims description 18
- 239000012535 impurity Substances 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 35
- 239000001257 hydrogen Substances 0.000 abstract description 34
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 34
- 229910018540 Si C Inorganic materials 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 27
- 238000001816 cooling Methods 0.000 description 15
- 238000009864 tensile test Methods 0.000 description 14
- 238000002474 experimental method Methods 0.000 description 11
- 239000000203 mixture Substances 0.000 description 10
- 239000002245 particle Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910000734 martensite Inorganic materials 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 238000002441 X-ray diffraction Methods 0.000 description 4
- 238000000889 atomisation Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910052758 niobium Inorganic materials 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 229910052720 vanadium Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000000110 selective laser sintering Methods 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009689 gas atomisation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000007561 laser diffraction method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000000790 scattering method Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Powder Metallurgy (AREA)
Abstract
Description
・線a:一般的な溶接条件でオーステナイト100%となる境界
Ni当量=-8.859+1.176×Cr当量
・線b:一般的な溶接条件でフェライト100%となる境界
Ni当量=-6.100+0.400×Cr当量
・線c:冷却速度が1.9×103K/sの時にオーステナイト100%となる境界
Ni当量=-8.702+1.088×Cr当量
・線d:冷却速度が1.9×103K/sの時にフェライト100%となる境界
Ni当量=-7.814+0.640×Cr当量
・線e:冷却速度が2.0×105K/sの時にオーステナイト100%となる境界
Ni当量=-7.571+0.937×Cr当量
・線f:冷却速度が2.0×105K/sの時にフェライト100%となる境界
Ni当量=-9.244+0.838×Cr当量
・線g:冷却速度が2.0×105K/sの時にオーステナイト:フェライトの体積比が50:50となる線
Ni当量=-8.408+0.888×Cr当量
Claims (3)
- 原料粉末を準備する工程と、
前記原料粉末を用い、付加製造法によって所定の形状に造形して造形まま材を得る工程と、
前記造形まま材を500℃以上、680℃以下の温度で熱処理する工程とを有し、
前記原料粉末は、フェライト相が混在するオーステナイト系ステンレス鋼からなり、
前記原料粉末のオーステナイト安定度、[Ni]+0.65[Cr]+0.98[Mo]+1.05[Mn]+0.35[Si]+12.6[C]([X]は元素Xの質量%を表す)の値が28.5以上、40以下である、
オーステナイト系ステンレス鋼造形物の製造方法。 - 前記原料粉末のNi当量を[Ni]+0.5[Mn]+30[C]、Cr当量を[Cr]+[Mo]+1.5[Si]+0.5[Nb]([X]は元素Xの質量%を表す)としたときに、
Ni当量≦-7.571+0.937×Cr当量、かつ
Ni当量≧-8.408+0.888×Cr当量である、
請求項1に記載のオーステナイト系ステンレス鋼造形物の製造方法。 - 前記原料粉末が、質量%で、
C:0.005~0.10%、
Si:0.1~1.0%、
Mn:3.0~7.0%、
Ni:10~17%、
Cr:20~25%、
Mo:2.0~6.0%、
N:0.10~0.40%、
Nb:0.01~0.50%、
V:0~0.5%、
残部がFeおよび不可避的不純物からなる、
請求項1または2に記載のオーステナイト系ステンレス鋼造形物の製造方法。
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05263199A (ja) * | 1990-12-20 | 1993-10-12 | Sumitomo Metal Ind Ltd | 焼結ステンレス鋼 |
JPH08176603A (ja) * | 1994-12-28 | 1996-07-09 | Mitsubishi Steel Mfg Co Ltd | 窒素含有雰囲気下での焼結用高耐食性粉末およびその焼結製品 |
JP2017008413A (ja) * | 2015-06-16 | 2017-01-12 | 新日鐵住金株式会社 | 低温水素用オーステナイト系ステンレス鋼及びその製造方法 |
JP2017213588A (ja) * | 2016-06-01 | 2017-12-07 | 新日鐵住金株式会社 | オーステナイト系ステンレス鋼溶接継手の製造方法 |
JP2019210523A (ja) * | 2018-06-06 | 2019-12-12 | 株式会社日立製作所 | オーステナイト系ステンレス鋼及び原子炉内構造物 |
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2022
- 2022-08-23 JP JP2022132253A patent/JP7191266B1/ja active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05263199A (ja) * | 1990-12-20 | 1993-10-12 | Sumitomo Metal Ind Ltd | 焼結ステンレス鋼 |
JPH08176603A (ja) * | 1994-12-28 | 1996-07-09 | Mitsubishi Steel Mfg Co Ltd | 窒素含有雰囲気下での焼結用高耐食性粉末およびその焼結製品 |
JP2017008413A (ja) * | 2015-06-16 | 2017-01-12 | 新日鐵住金株式会社 | 低温水素用オーステナイト系ステンレス鋼及びその製造方法 |
JP2017213588A (ja) * | 2016-06-01 | 2017-12-07 | 新日鐵住金株式会社 | オーステナイト系ステンレス鋼溶接継手の製造方法 |
JP2019210523A (ja) * | 2018-06-06 | 2019-12-12 | 株式会社日立製作所 | オーステナイト系ステンレス鋼及び原子炉内構造物 |
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