JP2012041632A - Cold-rolled and quenched strip steel product - Google Patents
Cold-rolled and quenched strip steel product Download PDFInfo
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- JP2012041632A JP2012041632A JP2011181964A JP2011181964A JP2012041632A JP 2012041632 A JP2012041632 A JP 2012041632A JP 2011181964 A JP2011181964 A JP 2011181964A JP 2011181964 A JP2011181964 A JP 2011181964A JP 2012041632 A JP2012041632 A JP 2012041632A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 61
- 239000010959 steel Substances 0.000 title claims abstract description 61
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 150000001247 metal acetylides Chemical class 0.000 claims description 10
- 239000011651 chromium Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 229910052721 tungsten Inorganic materials 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims 1
- 238000005272 metallurgy Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000000047 product Substances 0.000 description 19
- 229910052799 carbon Inorganic materials 0.000 description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 11
- 239000011572 manganese Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 238000010791 quenching Methods 0.000 description 8
- 238000009826 distribution Methods 0.000 description 7
- 230000000171 quenching effect Effects 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 4
- 238000005098 hot rolling Methods 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 229910052750 molybdenum Inorganic materials 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000005275 alloying Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000005242 forging Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910052720 vanadium Inorganic materials 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- -1 carbon forms carbides Chemical class 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910003470 tongbaite Inorganic materials 0.000 description 2
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- WIGAYVXYNSVZAV-UHFFFAOYSA-N ac1lavbc Chemical group [W].[W] WIGAYVXYNSVZAV-UHFFFAOYSA-N 0.000 description 1
- RMXTYBQNQCQHEU-UHFFFAOYSA-N ac1lawpn Chemical compound [Cr]#[Cr] RMXTYBQNQCQHEU-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000007774 anilox coating Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910021386 carbon form Inorganic materials 0.000 description 1
- 239000005539 carbonized material Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 230000003278 mimic effect Effects 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- SBEQWOXEGHQIMW-UHFFFAOYSA-N silicon Chemical compound [Si].[Si] SBEQWOXEGHQIMW-UHFFFAOYSA-N 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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Classifications
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G3/00—Doctors
- D21G3/005—Doctor knifes
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/004—Dispersions; Precipitations
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Heat Treatment Of Articles (AREA)
- Paper (AREA)
Abstract
Description
本発明は、コーターブレード及びドクターブレードの製造に好適な、従来の冶金技術により製造された冷延及び焼入れされたストリップ鋼（帯鋼）製品に関する。詳細には、本発明は、鋼中の炭素と炭化物を形成し、それにより鋼の強度及び耐摩耗性を増加させる合金元素を含む鋼から製造された鋼ストリップ製品に関する。 The present invention relates to cold-rolled and quenched strip steel products manufactured by conventional metallurgical techniques suitable for the production of coater blades and doctor blades. In particular, the present invention relates to steel strip products made from steel containing alloying elements that form carbon and carbides in the steel, thereby increasing the strength and wear resistance of the steel.
ストリップ鋼製品は、例えば、コーターブレード、ドクターブレード、及びクレープブレードの形態で製紙及び印刷業界において使用されている。これらのブレードは、比較的薄くて長く、直線性、耐摩耗性、及び強度に関する高い要求に耐えなければならないという点が共通している。例えば、コーターブレードは、ペーパーウェブにコーティングスリップを塗布するのに使用される。これらのブレードは、動いているペーパーウェブに対して押しつけられ、通常カウンターロール又は両面塗布が実施されている場合、ペーパーウェブの反対側にあるブレードにより与えられる背圧がある。均一で最高品質のコーティングを確保するためには、コーターブレードは直線でなくてはならない。通常の仕様では、コーターブレードの機械加工された刃先の、完全な直線からの逸れが、コーターブレードの長さ３，０００ｍｍあたり０．３ｍｍ以下でなくてはならない。さらに、印刷工程での計画外の中断は損失が大きいので、コーターブレードは高い耐摩耗性を持ち、予測可能な寿命を持たなくてはならない。従来、炭素鋼が、その高い焼入れ性のため、製紙及び印刷業界用のブレードの製造に使用されてきた。 Strip steel products are used in the paper and printing industry, for example, in the form of coater blades, doctor blades, and crepe blades. In common, these blades are relatively thin and long and must withstand high demands on linearity, wear resistance, and strength. For example, a coater blade is used to apply a coating slip to a paper web. These blades are pressed against the moving paper web and there is a back pressure provided by the blade on the opposite side of the paper web, usually when a counter roll or double-sided application is performed. The coater blade must be straight to ensure a uniform and highest quality coating. Under normal specifications, the deviation of the machined cutting edge of the coater blade from a perfect straight line should be no more than 0.3 mm per 3,000 mm of coater blade length. Furthermore, because unplanned interruptions in the printing process are lossy, the coater blade must have high wear resistance and a predictable life. Traditionally, carbon steel has been used in the manufacture of blades for the paper and printing industry due to its high hardenability.
強度及び耐摩耗性を増すために、炭化物を形成し得る合金元素を鋼組成に添加することが示唆されてきた。その例は、欧州特許第０６７２７６１号及び米国特許第６５４７８４６号に開示されている。欧州特許第０６７２７６１号は、２．６％のＣｒ、２．３％のＭｏ、２％のＶ、０．５５％のＣ、１．０％のＳｉ、及び０．８％のＭｎを含む鋼を記載している。米国特許第６５４７８４６号は、４．０％のＣｒ、２．０％のＭｏ、２．０％のＷ、１．０〜１．８％のＶ、０．３２〜０．３５％のＭｎ、０．４６〜１．０％のＳｉ、及び０．４８〜０．７５％のＣを含む鋼を開示している。さらに、米国特許第６６３２３０１Ｂ２号は、最大で２．６％のＣｒ、最大で２．３％のＭｏ、最大０．５６％のＷ、及び最大で０．９％のＶを有する種々の鋼を開示している。
To increase strength and wear resistance, it has been suggested to add alloying elements to the steel composition that can form carbides. Examples are disclosed in
炭化物形成元素を導入し、それにより最終的な鋼製品に硬い炭化物が分布すると、材料の硬さ及び耐摩耗性が増加する。硬さだけでは、材料を、製紙及び印刷業界におけるブレードとして意図された使用に最適にはしない。他の表面に接触するブレードの部分は、典型的には薄刃である。摩耗は小さくなくてはならないが、良好に制御され、接触表面に沿って均一でなくてはならない。刃先でのブレードの厚さは炭化物の大きさと同じ程度になりうるので、炭化物が大きすぎる場合、炭化物の導入はブレードの刃先でのチッピングの危険性を増す欠点を有する。 The introduction of carbide-forming elements and thereby the distribution of hard carbides in the final steel product increases the hardness and wear resistance of the material. Stiffness alone does not optimize the material for its intended use as a blade in the paper and printing industry. The portion of the blade that contacts the other surface is typically a thin blade. The wear must be small, but it must be well controlled and uniform along the contact surface. Since the blade thickness at the cutting edge can be as large as the carbide size, the introduction of carbide has the disadvantage of increasing the risk of chipping at the blade edge if the carbide is too large.
したがって、耐摩耗性があり、高い強度を有し、溶解、鋳造、鍛造、熱延及び冷延、及び最終的な熱処理により製造及び処理が比較的容易である鋼がまだ必要とされている。 Therefore, there is still a need for steel that is wear resistant, has high strength, and is relatively easy to manufacture and process by melting, casting, forging, hot and cold rolling, and final heat treatment.
本開示の目的は、コーターブレード、ドクターブレード、及びクレープブレードなどの高摩耗用途に好適なストリップ鋼製品を提供することである。 An object of the present disclosure is to provide strip steel products suitable for high wear applications such as coater blades, doctor blades, and crepe blades.
本発明の目的は、請求項１に定義されたストリップ鋼製品により達成される。 The object of the invention is achieved by a strip steel product as defined in claim 1.
本発明は、質量％で、以下の組成：Ｃ：０．４〜０．８、Ｓｉ：０．４〜１．２、Ｍｎ：０．２〜０．５５、Ｃｒ：３．５〜４．５、Ｗ：１．５〜４．０、及びＭｏ：１．０〜１．８、残部Ｆｅ及び通常存在する不純物を有する鋼からなるストリップ鋼製品に関する。ストリップ鋼製品は、好ましくは、コーターブレード、ドクターブレード、及びクレープブレードなどの印刷及び製紙ブレードに使用される。 This invention is the mass% and is the following compositions: C: 0.4-0.8, Si: 0.4-1.2, Mn: 0.2-0.55, Cr: 3.5-4. 5, W: 1.5 to 4.0, and Mo: 1.0 to 1.8, and relates to a strip steel product made of steel having the balance Fe and impurities that are normally present. Strip steel products are preferably used in printing and papermaking blades such as coater blades, doctor blades, and crepe blades.
本発明のストリップ鋼製品は、６７０ＨＶ程度の硬さを有し、摩耗測定及び試験製造において非常に高い耐摩耗性を有することを示した。 The strip steel product of the present invention has a hardness of the order of 670 HV and has been shown to have very high wear resistance in wear measurement and test production.
本発明のストリップ鋼製品のおかげで、例えば著しく長くなった寿命を有するコーターブレードを製造することが可能であり、そのため製紙又は印刷製造ラインにおける中断時間が低減される。ストリップ鋼製品中の炭化物の粒度分布を制御する可能性により、薄刃を持つがチッピングの傾向が著しく低減したブレードを提供することが可能である。 Thanks to the strip steel product according to the invention, it is possible to produce, for example, coater blades having a significantly longer life, so that downtime in the paper or printing production line is reduced. Due to the possibility of controlling the particle size distribution of carbides in the strip steel product, it is possible to provide blades with thin blades but with a significantly reduced tendency to chipping.
本発明のさらなる特徴及び利点は、以下の詳細な説明及び独立した特許請求項に示されるだろう。 Additional features and advantages of the invention will be set forth in the following detailed description and in the independent claims.
（詳細な説明）
本開示の鋼は、好ましくは、溶解、鋳造、鍛造、熱延及び冷延などの従来の方法により製造される。炭化物の大きさ及び分布を注意深く制御する必要があるので、最終製品の厚みのない寸法のために粉末冶金などの他の方法があまり好適でない。また、粉末中の酸素含有量及び最終品中の酸化物を制御するのが困難であるので、粉末冶金はあまり魅力的でない。
(Detailed explanation)
The steel of the present disclosure is preferably produced by conventional methods such as melting, casting, forging, hot rolling and cold rolling. Other methods, such as powder metallurgy, are less preferred because of the thicknessless dimensions of the final product because the carbide size and distribution must be carefully controlled. Also, powder metallurgy is not very attractive because it is difficult to control the oxygen content in the powder and the oxide in the final product.
鋼組成の各合金元素の効果及び含有量をより詳細に説明する。 The effect and content of each alloy element of the steel composition will be described in more detail.
炭素
炭素含有量は材料の焼入れ性及びその硬さに影響する。材料を焼入れするために、Ｃの含有量は、少なくともおよそ０．４質量％である必要がある。より多量に存在する場合、炭素は炭化物を形成し、それが鋼の硬さをさらに増す。しかし、Ｃの含有量が高すぎると、処理が困難になる。したがって、Ｃの含有量は最大で０．８質量％に制限するべきである。本発明の鋼には、適切な量の炭化物及び良好な焼入れ性を達成するために、０．４〜０．８質量％の炭素含有量が選択される。本発明の一実施形態によると、炭素含有量は０．４５〜０．７質量％である。炭素含有量の範囲は、炭素含有量が０．５（ａ）、０．５５（ｂ）、０．６（ｃ）、及び０．６５（ｄ）質量％である、図１ａ−ｄに示されるＴｈｅｒｍｏＣａｌｃ計算により確かめられる。他の構成要素は表１の試料Ａのとおりである。
Carbon The carbon content affects the hardenability of the material and its hardness. In order to quench the material, the C content needs to be at least approximately 0.4% by weight. When present in higher amounts, carbon forms carbides that further increase the hardness of the steel. However, if the C content is too high, the treatment becomes difficult. Therefore, the C content should be limited to 0.8% by mass at the maximum. For the steel according to the invention, a carbon content of 0.4 to 0.8% by weight is selected in order to achieve a suitable amount of carbide and good hardenability. According to one embodiment of the present invention, the carbon content is 0.45 to 0.7% by mass. The range of carbon content is shown in FIGS. 1a-d, where the carbon content is 0.5 (a), 0.55 (b), 0.6 (c), and 0.65 (d) mass%. This is confirmed by the ThermoCalc calculation. Other components are as shown in Sample A in Table 1.
ケイ素
ケイ素は、製造プロセス、例えば脱酸の結果として常に存在する。また、無心焼入れが好ましい場合の焼入れ処理を促進する。さらに、ケイ素は高温強度を向上させる。しかし、高過ぎる濃度のケイ素は、高強度材料に望まれないフェライトを安定化する。本鋼組成によると、ケイ素の含有量は０．４〜１．２質量％である。一実施形態によると、含有量は最大０．４〜０．９質量％である。
Silicon Silicon is always present as a result of manufacturing processes such as deoxidation. In addition, the quenching process is promoted when the coreless quenching is preferred. In addition, silicon improves high temperature strength. However, too high a concentration of silicon stabilizes ferrite that is not desired in high strength materials. According to the steel composition, the silicon content is 0.4 to 1.2% by mass. According to one embodiment, the content is at most 0.4-0.9% by weight.
マンガン
Ｍｎは製造プロセスの結果として存在して、脱酸を促進し、硫黄の悪影響を打ち消す。マンガンは降伏強度及び引張強度を向上させるとともに、無心焼入れを促進する。高すぎる濃度のＭｎは、高濃度の残留オーステナイトをもたらすが、残留オーステナイトの危険性に関する好適なＭｎ含有量は、他の合金元素に依存する。本組成によると、Ｍｎの含有量は０．２〜０．５５質量％である。一実施形態によると、Ｍｎの含有量は０．２０〜０．４０質量％である。
Manganese Mn is present as a result of the manufacturing process, promoting deoxidation and counteracting the negative effects of sulfur. Manganese improves yield strength and tensile strength, and promotes non-center quenching. A concentration of Mn that is too high results in a high concentration of retained austenite, but the preferred Mn content for the risk of retained austenite depends on the other alloying elements. According to this composition, the Mn content is 0.2 to 0.55% by mass. According to one embodiment, the Mn content is 0.20 to 0.40 mass%.
クロム
クロムは鋼の強度並びに耐摩耗性を向上させる。クロムは炭素とともに炭化物を形成する。Ｃｒは、空気、油、又は水の中での急冷中に十分なマルテンサイトを形成可能にすることにより、鋼に十分な焼入れ性も与える。しかし、Ｃｒの含有量が高すぎると、例えばＶの所望の炭化物の安定性を低下させる。本発明鋼は、３．５〜４．５質量％のＣｒを含む。
Chromium Chromium improves the strength and wear resistance of steel. Chromium forms carbides with carbon. Cr also provides sufficient hardenability to the steel by allowing sufficient martensite to form during quenching in air, oil, or water. However, if the Cr content is too high, for example, the stability of the desired carbide of V is reduced. The steel of the present invention contains 3.5 to 4.5% by mass of Cr.
タングステン
タングステンは、炭素とともに炭化物を形成する。その結果として、耐摩耗性が増加する。さらに、Ｗはベイナイトの形成を抑制するので、無心焼入れも促進される。Ｗは高温強度も向上させる。それは、材料の良好な刃先の先鋭化を与える。本発明によると、好ましい効果を得るためには、１．５質量％のタングステン含有量が必要である。しかし、高含有量の炭素と組み合わされた高含有量のタングステンは、初期製造段階において多量の炭化物、すなわち一次炭化物を生成させ、したがって、例えば熱延による材料の処理が困難になる。したがって、本発明鋼のＷの最大含有量は、４質量％に、好ましくは最大で２．５質量％に制限される。一実施形態によると、Ｗ含有量は１．５〜２．５質量％である。
Tungsten Tungsten forms a carbide with carbon. As a result, wear resistance is increased. Furthermore, since W suppresses the formation of bainite, the coreless quenching is also promoted. W also improves high temperature strength. It gives a good edge sharpening of the material. According to the present invention, a tungsten content of 1.5% by weight is necessary to obtain a favorable effect. However, a high content of tungsten combined with a high content of carbon produces a large amount of carbide, i.e., primary carbide, in the initial manufacturing stage, thus making it difficult to process the material, for example by hot rolling. Therefore, the maximum W content of the steel of the present invention is limited to 4% by mass, preferably 2.5% by mass at maximum. According to one embodiment, the W content is 1.5-2.5% by weight.
モリブデン
Ｍｏは鋼の高温強度を増加させる。鋼の他の元素のいくつかと同様に、Ｍｏも炭素とともに炭化物を形成する。また、降伏強度を増加させ、無心焼入れを促進する。Ｍｏの含有量が高すぎると、処理の間に鋼が酸化されやすくなり、製造プロセスをより困難にすることがある。したがって、本発明鋼は１〜１．８質量％のＭｏを含む。
Molybdenum Mo increases the high temperature strength of the steel. Like some of the other elements in steel, Mo forms carbides with carbon. It also increases the yield strength and promotes incentive quenching. If the Mo content is too high, the steel is likely to be oxidized during processing, which may make the manufacturing process more difficult. Accordingly, the steel of the present invention contains 1 to 1.8% by mass of Mo.
不純物
上記の元素に加え、使用されるスクラップの組成により、数種の不純物が常に存在する。そのような不純物の例はＮｉ及びＣｕであり、この２種の元素はそれぞれ最大０．２質量％に制限しなければならない。さらに、例えば脱酸又は熱間延性のための、通常存在する製鋼添加物によっても不純物は存在する。
Impurities In addition to the above elements, there are always several types of impurities, depending on the composition of the scrap used. Examples of such impurities are Ni and Cu, and the two elements must each be limited to a maximum of 0.2% by weight. Furthermore, impurities are also present due to the steelmaking additives normally present, for example for deoxidation or hot ductility.
本発明鋼の範囲内の公称組成を持ついくつかの試料を、溶解炉中の従来の冶金処理、再溶解、鋳造、鍛造、及び熱延により製造した。試料の平均を、表１及び以下において試料Ａと表す。表１は、市販の比較試料も表すが、試料Ｂは、欧州特許第０６７２７６１号に開示された鋼に相当する鋼であり、Ｃは従来の炭素鋼であり、Ｄは高クロム鋼である。含有量は質量％で示す。
Several samples with a nominal composition within the scope of the steel of the present invention were produced by conventional metallurgical processing, remelting, casting, forging, and hot rolling in a melting furnace. The average of the samples is represented as Sample A in Table 1 and below. Table 1 also represents commercially available comparative samples, but sample B is a steel corresponding to the steel disclosed in
図２は、摩耗測定の結果を表す。摩耗測定は、実際的な条件を厳密に模倣するように設計した。表１の材料のブレードを、２００ｍ／分で２バールの圧力で１７５ｃｍのアニロックスシリンダーに当てて、１６時間摩耗させた。ａ）は媒体としてプロセス水があり、ｂ）は脱イオン水があり、ｃ）は平均の結果である。図２ａ−ｃに示されているとおり、本発明の組成を有する試料Ａは、試料Ｂ、Ｃ、及びＤに比べて優れた耐摩耗性を示した。プロセス水がある場合では、およそ２５％の向上が見られた。類似の結果が実際の製造試験でも見られた。上述のとおり、ストリップ鋼製品は、列記された用途に好適であるために高い硬さを持たなければならない。本発明のストリップ鋼製品は、およそ６７０ＨＶの硬さ及び２２００ＭＰａの引張強度を示す。要求される場合、刃先の焼入れにより硬さをさらに増すことができる。 FIG. 2 shows the results of wear measurements. Wear measurements were designed to closely mimic practical conditions. The blade of the material of Table 1 was applied to a 175 cm anilox cylinder at a pressure of 2 bar at 200 m / min and was worn for 16 hours. a) has process water as the medium, b) has deionized water, and c) is the average result. As shown in FIGS. 2 a-c, sample A having the composition of the present invention showed superior wear resistance compared to samples B, C, and D. In the presence of process water, an improvement of approximately 25% was seen. Similar results were seen in actual manufacturing tests. As mentioned above, strip steel products must have high hardness in order to be suitable for the listed applications. The strip steel product of the present invention exhibits a hardness of approximately 670 HV and a tensile strength of 2200 MPa. If required, the hardness can be further increased by quenching the cutting edge.
炭化物、すなわち炭化クロム及び炭化タングステン粒子の粒度分布がストリップ鋼製品の機械的性質にとって重要であると考えられる。本発明の鋼ストリップ製品中の炭化物の粒度分布を図３に示す：クロム炭化物（四角）、タングステン炭化物（ひし型）、及び組み合わせ（三角）。炭化物の粒度分布は、画像処理によりＳＥＭ顕微鏡写真から抽出した。印刷用ドクターブレード及び厚さ０．３ｍｍまでの薄いブレードを要する他の用途には、炭化物の直径は１μｍ未満でなくてはならず、好ましくは炭化物の大多数が０．６μｍ未満の直径を有する。 It is believed that the particle size distribution of the carbides, ie chromium carbide and tungsten carbide particles, is important for the mechanical properties of the strip steel product. The particle size distribution of carbides in the steel strip product of the present invention is shown in FIG. 3: chromium carbide (square), tungsten carbide (diamond), and combination (triangle). The particle size distribution of the carbide was extracted from the SEM micrograph by image processing. For other applications requiring printing doctor blades and thin blades up to 0.3 mm thick, the carbide diameter should be less than 1 μm, preferably the majority of carbides have a diameter less than 0.6 μm. .
本発明のストリップ鋼製品を、コーターブレード、ドクターブレード、及びクレープブレードなどの用途に関連して例証的に記載した。硬く耐摩耗性のストリップ鋼が使用される他の用途、例えば、ナイフ及び鋸用途、バルブ用途及びダイ例えばラベルダイ。 The strip steel product of the present invention has been illustratively described in connection with applications such as coater blades, doctor blades, and crepe blades. Other applications where hard and wear resistant strip steel is used, such as knife and saw applications, valve applications and dies such as label dies.
Claims (10)
Ｃ：０．４〜０．８
Ｓｉ：０．４〜１．２
Ｍｎ：０．２〜０．５５
Ｃｒ：３．５〜４．５
Ｗ：１．５〜４．０
Ｍｏ：１．０〜１．８
残部Ｆｅ及び通常存在する不純物を有する鋼からなることを特徴とするストリップ鋼製品。 The following composition in mass%:
C: 0.4 to 0.8
Si: 0.4 to 1.2
Mn: 0.2 to 0.55
Cr: 3.5 to 4.5
W: 1.5-4.0
Mo: 1.0-1.8
A strip steel product, characterized by comprising steel with the balance Fe and impurities that are normally present.
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| Application Number | Priority Date | Filing Date | Title |
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| SE1050861A SE535064C2 (en) | 2010-08-23 | 2010-08-23 | Cold rolled and cured strip steel product |
| SE1050861-2 | 2010-08-23 |
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| JP2012041632A true JP2012041632A (en) | 2012-03-01 |
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| EP (1) | EP2423345B1 (en) |
| JP (1) | JP5908686B2 (en) |
| CN (1) | CN102373373B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2018504521A (en) * | 2014-12-10 | 2018-02-15 | フェストアルピーネ プレジション ストリップ アーベーＶｏｅｓｔａｌｐｉｎｅ Ｐｒｅｃｉｓｉｏｎ Ｓｔｒｉｐ Ａｂ | Long-life cermet coated creping blade |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2896714B1 (en) * | 2014-01-17 | 2016-04-13 | voestalpine Precision Strip AB | Creping blade and method for its manufacturing |
| EP3165367A1 (en) | 2015-11-04 | 2017-05-10 | BTG Eclépens S.A. | Doctor blade, inking arrangement and use of doctor blade in flexographic printing |
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| JPH07268542A (en) * | 1994-02-17 | 1995-10-17 | Uddeholm Strip Steel Ab | Alloy steel composition |
| JPH11229031A (en) * | 1998-02-13 | 1999-08-24 | Hitachi Metals Ltd | Production of high speed tool steel tool |
| JPH11279640A (en) * | 1998-03-30 | 1999-10-12 | Hitachi Metals Ltd | High speed tool steel strip excellent in flatness, and its manufacture |
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| FR2509640A1 (en) * | 1981-07-17 | 1983-01-21 | Creusot Loire | PROCESS FOR PRODUCING A COMPOSITE METAL PART AND PRODUCTS OBTAINED |
| JPH10298709A (en) * | 1997-04-25 | 1998-11-10 | Hitachi Metals Ltd | Tool steel for hot working excellent in wear resistance, and tool steel product |
| SE512970C2 (en) * | 1998-10-30 | 2000-06-12 | Erasteel Kloster Ab | Steel, the use of the steel, the product made of the steel and the way of making the steel |
| US6632301B2 (en) | 2000-12-01 | 2003-10-14 | Benton Graphics, Inc. | Method and apparatus for bainite blades |
| JP2004315840A (en) * | 2003-04-11 | 2004-11-11 | Daido Steel Co Ltd | Cold working tool steel superior in machinability, and manufacturing method therefor |
| SE526191C2 (en) * | 2003-12-19 | 2005-07-26 | Sandvik Ab | Egg-provided tools and methods for making them |
| JP4403875B2 (en) * | 2004-05-14 | 2010-01-27 | 大同特殊鋼株式会社 | Cold work tool steel |
| JP4857811B2 (en) * | 2006-02-27 | 2012-01-18 | Ｊｆｅスチール株式会社 | Steel for knives |
| CN101153374B (en) * | 2006-09-27 | 2010-09-08 | 宝山钢铁股份有限公司 | Steel for paper cutter blade and method of producing the same |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07268542A (en) * | 1994-02-17 | 1995-10-17 | Uddeholm Strip Steel Ab | Alloy steel composition |
| JPH11229031A (en) * | 1998-02-13 | 1999-08-24 | Hitachi Metals Ltd | Production of high speed tool steel tool |
| JPH11279640A (en) * | 1998-03-30 | 1999-10-12 | Hitachi Metals Ltd | High speed tool steel strip excellent in flatness, and its manufacture |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2018504521A (en) * | 2014-12-10 | 2018-02-15 | フェストアルピーネ プレジション ストリップ アーベーＶｏｅｓｔａｌｐｉｎｅ Ｐｒｅｃｉｓｉｏｎ Ｓｔｒｉｐ Ａｂ | Long-life cermet coated creping blade |
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| CN102373373B (en) | 2016-01-06 |
| SE1050861A1 (en) | 2012-02-24 |
| JP5908686B2 (en) | 2016-04-26 |
| SE535064C2 (en) | 2012-04-03 |
| EP2423345A1 (en) | 2012-02-29 |
| CN102373373A (en) | 2012-03-14 |
| EP2423345B1 (en) | 2017-10-18 |
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