WO2009119881A1 - 耐銹性に優れたディスクブレーキ用マルテンサイト系ステンレス鋼 - Google Patents
耐銹性に優れたディスクブレーキ用マルテンサイト系ステンレス鋼 Download PDFInfo
- Publication number
- WO2009119881A1 WO2009119881A1 PCT/JP2009/056761 JP2009056761W WO2009119881A1 WO 2009119881 A1 WO2009119881 A1 WO 2009119881A1 JP 2009056761 W JP2009056761 W JP 2009056761W WO 2009119881 A1 WO2009119881 A1 WO 2009119881A1
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- WIPO (PCT)
- Prior art keywords
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- steel
- weather resistance
- stainless steel
- quenching
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
Definitions
- the present invention relates to martensitic stainless steel for disc brakes of motorcycles, and particularly to martensitic stainless steel having excellent weather resistance.
- motorcycle disc brakes are required to have excellent characteristics such as wear resistance, weather resistance, and toughness. Abrasion resistance is generally better at higher hardness. On the other hand, if the hardness is too high, a so-called brake squeal occurs between the brake and the pad.
- martensitic stainless steel is used as a motorcycle disc brake material.
- S U S 4 2 0 J 2 was quenched and tempered, adjusted to the desired hardness, and used as a brake. In this case, two heat treatment steps, quenching and tempering, are required.
- Japanese Patent Application Laid-Open No. 5 7-1 9 8 2 4 9 discloses a steel composition that stably obtains a desired hardness in a quenching temperature range wider than that of conventional steel. This is a reduction in C and N, and the reduction in the austenite temperature range, that is, the decrease in the quenching temperature range, is compensated by the addition of the austenite forming element Mn. .
- Japanese Patent Laid-Open No. 8-6 0 3 0 9 discloses that low-Mn steel is quenched and hardened.
- a steel disc brake steel that can be used as is is disclosed. This steel is made by adding Ni and Cu, which have the same effect as an austenite forming element, instead of reducing M n.
- martensitic stainless steel as a material for two-fte disk printing is that the steel has excellent weather resistance.
- the Cr content is about 12% and M n is contained in large amounts.
- the weather resistance may not be sufficient. This is especially a problem in the harsh chloride environment. It is said that MnS in steel is the starting point for this, but it has not been elucidated.
- Japanese Patent Application Laid-Open No. 10-155 2 7 60 discloses an invention in which weather resistance is improved by reducing M n and increasing CU.
- Japanese Patent No. 2 6 94 1 discloses an invention in which weather resistance is improved by adding T i.
- the gigantic aspect of the present invention is to provide martensitic stainless steel for disc brakes having excellent gun resistance.
- the gist of the present invention is as follows.
- N 0. 0 0 5% or more 0.0.50% or less
- V 1% or less
- T P defined by the following formula (1) is 80 or more
- a martensitic stainless steel for disc brakes with excellent weather resistance A martensitic stainless steel for disc brakes with excellent weather resistance.
- composition according to (1) above further containing 0.5% or less in total by mass% of one or more of P, Sb, and 81 Excellent martensite stainless steel for disc brakes.
- any one of the above (1) to (4) characterized by containing 1% or 2% by mass%, Mo: 2% or less, and Nb: 1% or less Martensitic high-grade stainless steel for disc brakes with excellent weather resistance.
- a martensitic stainless steel for disc brakes having excellent weather resistance can be provided.
- the present inventors have conducted a detailed study on a steel material for a motorcycle disc brake that can be used as it is quenched.
- the weather resistance we put emphasis not only on the weather resistance after quenching, but also on the weather resistance before quenching when actually mounted on a motorcycle. This is because it occurred during quenching before quenching.
- the disk sliding surface is ground, so there is almost no problem. However, depending on the disk design, there are parts that are not ground.
- the inventors of the present invention have studied mainly on the weather resistance in a chloride environment, and as a result of studying means for improving the weather resistance of the disk material not only after quenching but also before quenching, 7 — 3 2 1 2 4 5 As described in the gazette, it was found that the addition of trace amounts of P, A s, S b and B i increases weather resistance. It was. Furthermore, as a result of research, it was found that Sn also has the effect of improving weather resistance.
- Sn improves weather resistance in a chloride environment. It is also effective to combine with one or more of P, As, Sb, and Bi. However, As is highly toxic and should be used with caution.
- C is an essential element for obtaining the required hardness after quenching, and is added in combination with N. If added over 0.1%, the hardness will increase too much, causing problems such as brake squealing and deterioration of toughness. Therefore, 0.1% is the upper limit. If C is less than 0.01%, N must be added excessively in order to obtain a predetermined hardness, so 0.01% is made the lower limit.
- N is an essential element for obtaining a predetermined hardness after quenching, and is added in combination with C. If added over 0.050%, the hardenability will be lowered, so the upper limit is made 0.05%. If N is made less than 0.05%, the steelmaking cost will increase, so 0.05% is made the lower limit.
- C + N is an amount directly related to the hardness after quenching. 0.06% or more and 0.1% or less in order to obtain a predetermined HR C: 3 2 to 3 8
- S i is a very powerful element as a ferri cocoon-forming element. It is necessary to suppress the addition amount. Therefore, the addition amount should be 2% or less. In the present invention, S i may not be contained.
- M n is an element inevitably contained in steel, but is an important austenite forming element. Along with Ni and Cu, it is necessary to add 0.2% or more in order to secure a high steinite phase at high temperature and ensure hardenability. When the added amount exceeds 2.0%, deterioration of weather resistance is observed, so 2.0% is made the upper limit.
- Cr is a basic element necessary to ensure the weather resistance required for a two-wheel disc brake material. If the content is less than 10%, sufficient weather resistance cannot be obtained, so the lower limit is made 10%. Cr is a ferrite-forming element, so if it is added in excess of 14%, the formation temperature range of the austenite phase decreases, and a ferrite phase that does not transform into the martensite phase is generated in the quenching temperature range. However, after quenching, sufficient hardness cannot be obtained, so the upper limit is 14%.
- Ni like Mn, is an austenite-forming element, and is an effective element for securing the austenite phase at high temperatures and ensuring hardenability.
- Ni is an expensive element, we want to suppress its content as much as possible.
- Ni exceeds 2%, the toughness is reduced, so 2% is the upper limit. In the present invention, Ni may not be contained.
- a 1 is a very useful element as a deoxidizer. When 1 exceeds 0.1%, deterioration of weather resistance is observed, so 0.1% is the upper limit. In the present invention, A 1 may not be contained.
- V is an inevitable impurity element, but it is allowed to contain up to about 1%, which does not degrade workability.
- S is an element inevitably contained in steel. If the content exceeds 0. 0 1 0%, soluble C a S, which is the starting point of initiation, is easily generated. Therefore, the upper limit is 0.0.10%. In order to substantially detoxify the influence of C a S, it is preferably 0.05% or less. If S is less than 0.0 0 1%, the steelmaking cost will be greatly increased, so it is preferable to set the lower limit to 0.0 1%.
- P is an element inevitably contained in steel and has a tendency to reduce toughness. A small amount is preferable, and the content is less than 0.05%.
- the present inventors have found that weather resistance is improved by adding a small amount of Sn. The reason for this is unknown, but it is thought that there is a possibility of strengthening the slight amount of Sn force S and the surface passive layer. If it is less than 0.05%, the effect does not appear, and if it exceeds 1%, hot workability may be reduced, so Sn is not less than 0.005% 1% The following. Preferably, it is 0.0 1% or more and 0.7% or less, and more preferably 0.1% or more and 0.5% or less.
- one or more of P, As, Sb, and Bi can be added in a trace amount to improve weather resistance.
- As is highly toxic, it is preferable to limit its use, and although it is not added in the present invention, it is acceptable to contain it as an inevitable impurity.
- the total amount of P, Sb, and Bi is preferably 0.05% or more in order to obtain the effect of addition. If added in excess of 0.5%, the toughness decreases, so the total content is preferably 0.5% or less.
- C ⁇ , T i, Mo, and Z or N b can be added to further enhance the properties of the disc brake steel.
- Cu like Mn and Ni, is an element that is effective in securing the austenite phase and ensuring hardenability. Addition of Cu can reduce M n, improving weather resistance. Cu is an element that acts to suppress softening of the disk due to heat generated by braking. Addition If the amount is less than 0.01%, the effect of addition is not remarkable, so 0.01% or more is preferable. However, if it exceeds 2%, the toughness decreases, so 2% or less is preferable.
- T i is an element that enhances weather resistance. It is estimated that the generation of MnS is suppressed and the weather resistance is improved by the generation of Ti-based sulfides. In order to obtain the improvement effect, addition of 0.01% or more is preferable. However, if T i is added excessively, carbonitrides are formed and C and N are consumed, so the upper limit is 0.5%.
- Mo is an element that significantly improves the temper softening resistance when added in an appropriate amount. The mechanism of this improvement is not clear, but Mo suppresses the precipitation and coarsening of Cr carbide and suppresses dislocation motion at high temperature, which is thought to improve the temper softening resistance.
- the addition is less than 0.01%, the effect of addition is not remarkable, so the lower limit is preferably 0.01%. If it exceeds 2%, the toughness decreases, so the upper limit is 2%.
- Nb is also an important element in the present invention. Addition of an appropriate amount of Nb significantly improves temper softening resistance. Although the mechanism of this improvement is not clear, Nb has a large correlation with N, which suppresses the precipitation and coarsening of Cr nitride and suppresses dislocation movement, and is thought to improve the temper softening resistance.
- the upper limit is set to 1%, avoiding excessive addition.
- addition of 0.01% or more is preferable.
- the following formula (1) is the "casto formula” proposed by castro. It is.
- the index p defined by the following formula (1) as an index, the present inventors have found that the stability of quenching can be evaluated by rP.
- ⁇ P is less than 80, even if quenched, the ferrite phase remains and the predetermined hardness level may not be reached.
- the steel of the present invention can secure a predetermined hardness range even if it is quenched from the temperature range.
- Steel slabs such as slabs and ingots with the above composition are melted and hot-rolled to form hot-rolled sheets with a thickness of about 2 to 8 mm.
- This hot-rolled sheet is annealed and softened, and then pickled to obtain a steel sheet for disks. It may be finished with Shot Brass ⁇ without pickling.
- Steel pieces with a thickness of 200 mm having the composition shown in Table 1 were melted and hot rolled into hot rolled sheets with a thickness of 6 mm.
- the hot-rolled sheet was softened and annealed by heating to 85 ° C. and gradually cooling. From these steel plates, weather resistance evaluation test pieces and hardenability evaluation test pieces were collected. The remaining steel plates were subjected to a quenching treatment in which they were kept at 95 ° C. to 100 ° C. for 10 minutes and then cooled with water.
- Scratch resistance is evaluated by the presence or absence of rusting by performing a salt spray test (SST) (conforming to JISZ 2 3 7 1) for 2400 hours on a test piece with both sides polished # 2 40 did. Those that did not occur were accepted and those that did not were accepted.
- SST salt spray test
- the hardenability is maintained at a temperature of 85 ° C. to 1 100 ° C. for 10 minutes, followed by water-cooled quenching material and a Rockwell hardness test (HR C) according to JISZ 2 2 4 5 , Evaluated by HR C. In HRC, 3 2 to 3 8 are acceptable.
- the weather resistance is the same as the material before quenching.
- the specimen is polished on both sides # 2 40 0 and subjected to a salt spray test for 2400 hours (according to JISZ 2 3 7 1). It was evaluated with. Those that did not occur were accepted, and those that did occur were rejected.
- Table 2 shows the evaluation results.
- Steel A to Steel G are steels with varying amounts of Sn.
- AQ steel comparative steel
- AQ steel comparative steel
- a R steel comparative steel
- C + N the hardness after quenching exceeds the acceptance criteria.
- a S steel (comparative steel) has low C + N, the hardness after quenching does not meet the standard.
- AT steel comparative steel
- AU steel (comparative steel) has a large amount of Cr, a is less than 80 and the hardness after quenching does not reach the acceptance standard.
- AV steel (comparative steel) has deteriorated toughness because the total amount of P, S b and B i exceeds 0.5%.
- AW steel (comparative steel) has high Mn, so its toughness has deteriorated.
- the steel of the present invention is very excellent in weather resistance while satisfying quenching hardness and heat resistance.
- martensitic stainless steel for disc brakes having excellent weather resistance can be provided. Therefore, according to the present invention, not only a steel manufacturer but also a steel user can obtain a great profit, and the present invention has an extremely high industrial value.
Abstract
Description
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2009801109403A CN101981217A (zh) | 2008-03-27 | 2009-03-25 | 耐锈性优良的盘式制动器用马氏体系不锈钢 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2008083649 | 2008-03-27 | ||
JP2008-083649 | 2008-03-27 | ||
JP2009-063190 | 2009-03-16 | ||
JP2009063190A JP2009256787A (ja) | 2008-03-27 | 2009-03-16 | 耐銹性に優れたディスクブレーキ用マルテンサイト系ステンレス鋼 |
Publications (1)
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WO2009119881A1 true WO2009119881A1 (ja) | 2009-10-01 |
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ID=41114061
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2009/056761 WO2009119881A1 (ja) | 2008-03-27 | 2009-03-25 | 耐銹性に優れたディスクブレーキ用マルテンサイト系ステンレス鋼 |
Country Status (4)
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JP (1) | JP2009256787A (ja) |
KR (1) | KR20100116684A (ja) |
CN (1) | CN101981217A (ja) |
WO (1) | WO2009119881A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102782170A (zh) * | 2010-02-24 | 2012-11-14 | 新日铁住金不锈钢株式会社 | 焊接区的耐蚀性优良的低铬不锈钢 |
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JP5335502B2 (ja) * | 2009-03-19 | 2013-11-06 | 新日鐵住金ステンレス株式会社 | 耐食性に優れたマルテンサイト系ステンレス鋼 |
CN102162062A (zh) * | 2011-04-07 | 2011-08-24 | 上海大学 | 一种含锡高氮马氏体不锈钢合金材料及其制造方法 |
CN102277538B (zh) * | 2011-07-27 | 2013-02-27 | 山西太钢不锈钢股份有限公司 | 一种含锡铁素体不锈钢板及其制造方法 |
KR101368502B1 (ko) * | 2011-12-28 | 2014-02-28 | 주식회사 포스코 | 방청성이 우수한 마르텐사이트계 스테인리스강 및 그의 제조방법 |
JP6169863B2 (ja) * | 2013-03-05 | 2017-07-26 | 新日鐵住金ステンレス株式会社 | 耐食性に優れた排気系部材用フェライト系ステンレス鋼 |
CN103255343A (zh) * | 2013-04-24 | 2013-08-21 | 宝钢不锈钢有限公司 | 一种具有优良性能的含锡马氏体不锈钢及其制造方法 |
WO2016043050A1 (ja) * | 2014-09-17 | 2016-03-24 | 新日鐵住金ステンレス株式会社 | ブレーキディスク用マルテンサイト系ステンレス鋼とその製造方法 |
JP6417252B2 (ja) * | 2014-09-17 | 2018-11-07 | 新日鐵住金ステンレス株式会社 | ブレーキディスク用マルテンサイト系ステンレス鋼とその製造方法 |
CN105349905A (zh) * | 2015-10-29 | 2016-02-24 | 无锡市嘉邦电力管道厂 | 一种耐高温耐腐蚀金属材料 |
CN106244894A (zh) * | 2016-08-15 | 2016-12-21 | 合肥万向钱潮汽车零部件有限公司 | 汽车用制动器蹄铁的材料配方 |
CN106591734A (zh) * | 2016-11-30 | 2017-04-26 | 邢台钢铁有限责任公司 | 高强度马氏体不锈钢盘条及其生产方法 |
CN107099756B (zh) * | 2017-05-10 | 2018-09-21 | 西宁特殊钢股份有限公司 | 一种高强度耐腐蚀抽油杆用钢及其生产方法 |
JP2020152992A (ja) * | 2019-03-22 | 2020-09-24 | 日鉄ステンレス株式会社 | ステンレス鋼板、ダイクエンチ部材、およびダイクエンチ部材の製造方法 |
KR20220024982A (ko) * | 2019-09-03 | 2022-03-03 | 닛테츠 스테인레스 가부시키가이샤 | 마르텐사이트계 스테인리스 강판 및 마르텐사이트계 스테인리스강 부재 |
WO2023121063A1 (ko) * | 2021-12-20 | 2023-06-29 | 주식회사 포스코 | 연화저항성이 향상된 마르텐사이트계 스테인리스강 및 그 제조방법 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000026941A (ja) * | 1998-05-08 | 2000-01-25 | Nippon Steel Corp | 耐食性に優れたディスクブレ―キ用マルテンサイト系ステンレス鋼 |
JP2001003142A (ja) * | 1999-06-22 | 2001-01-09 | Nippon Steel Corp | ディスクブレーキ用マルテンサイト系ステンレス鋼 |
JP2005179718A (ja) * | 2003-12-17 | 2005-07-07 | Nippon Steel & Sumikin Stainless Steel Corp | 高強度製品用ステンレス鋼線材および耐久性に優れたステンレス鋼製高力ボルト |
WO2007129651A1 (ja) * | 2006-05-01 | 2007-11-15 | Nippon Steel & Sumikin Stainless Steel Corporation | 耐銹性に優れたディスクブレーキ用マルテンサイト系ステンレス鋼 |
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2009
- 2009-03-16 JP JP2009063190A patent/JP2009256787A/ja active Pending
- 2009-03-25 CN CN2009801109403A patent/CN101981217A/zh active Pending
- 2009-03-25 WO PCT/JP2009/056761 patent/WO2009119881A1/ja active Application Filing
- 2009-03-25 KR KR1020107021221A patent/KR20100116684A/ko not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000026941A (ja) * | 1998-05-08 | 2000-01-25 | Nippon Steel Corp | 耐食性に優れたディスクブレ―キ用マルテンサイト系ステンレス鋼 |
JP2001003142A (ja) * | 1999-06-22 | 2001-01-09 | Nippon Steel Corp | ディスクブレーキ用マルテンサイト系ステンレス鋼 |
JP2005179718A (ja) * | 2003-12-17 | 2005-07-07 | Nippon Steel & Sumikin Stainless Steel Corp | 高強度製品用ステンレス鋼線材および耐久性に優れたステンレス鋼製高力ボルト |
WO2007129651A1 (ja) * | 2006-05-01 | 2007-11-15 | Nippon Steel & Sumikin Stainless Steel Corporation | 耐銹性に優れたディスクブレーキ用マルテンサイト系ステンレス鋼 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102782170A (zh) * | 2010-02-24 | 2012-11-14 | 新日铁住金不锈钢株式会社 | 焊接区的耐蚀性优良的低铬不锈钢 |
US8900380B2 (en) | 2010-02-24 | 2014-12-02 | Nippon Steel & Sumikin Stainless Steel Corporation | Low-chromium stainless steel excellent in corrosion resistance of weld |
CN102782170B (zh) * | 2010-02-24 | 2015-07-01 | 新日铁住金不锈钢株式会社 | 焊接区的耐蚀性优良的低铬不锈钢 |
Also Published As
Publication number | Publication date |
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CN101981217A (zh) | 2011-02-23 |
KR20100116684A (ko) | 2010-11-01 |
JP2009256787A (ja) | 2009-11-05 |
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