JP3874133B2 - Wear-resistant steel - Google Patents
Wear-resistant steel Download PDFInfo
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- JP3874133B2 JP3874133B2 JP29555697A JP29555697A JP3874133B2 JP 3874133 B2 JP3874133 B2 JP 3874133B2 JP 29555697 A JP29555697 A JP 29555697A JP 29555697 A JP29555697 A JP 29555697A JP 3874133 B2 JP3874133 B2 JP 3874133B2
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Description
【０００１】
【発明の属する技術分野】
本発明は耐摩耗性鋼に係り、特に、摺動特性が著しく良好で、油切れ状態や高ＰＶ（２．５ｋｇ／ｍｍ２・ｍ／ｓｅｃ）値条件下での異常摩耗を起こし難い高特性耐摩耗性鋼に関する。
【０００２】
【従来の技術】
ディーゼルエンジン等の内燃機関のピストンリングやその他の摺動部材用途に用いられる耐摩耗性鋼としては、工具鋼、軸受鋼、バネ鋼及びこれらの改良材（表面改質材を含む）などがある。
【０００３】
【発明が解決しようとする課題】
従来の耐摩耗性鋼は、いずれも摺動特性が十分でなく、このため、油切れ状態ないし高ＰＶ値条件下では異常摩耗を起こしやすいという欠点がある。
【０００４】
本発明は上記従来の問題点を解決し、強度、加工性、熱的安定性に優れる上に、摺動特性に優れ、油切れ状態ないし高ＰＶ値条件下において異常摩耗を起こし難い耐摩耗性鋼を提供することを目的とする。
【０００５】
【課題を解決するための手段】
本発明の耐摩耗性鋼は、
炭素：１．５〜２．５０重量％、
珪素：１．５０〜３．００重量％、
マンガン：０．８０〜３．００重量％、
硫黄：０．０１重量％以下及び
モリブデン：０．２０〜２．０重量％
を含み、残部Ｆｅ及び不可避的不純物よりなることを特徴とする。
【０００６】
本発明の耐摩耗性鋼は、更に、ニッケル：３．０重量％以下、アルミニウム：１．０重量％以下、タングステン：１．５重量％以下、バナジウム：２．０重量％以下及び硼素：０．５重量％以下、好ましくは、ニッケル：２．０重量％以下、アルミニウム：０．５重量％以下、タングステン：０．８重量％以下、バナジウム：１．０重量％以下及び硼素：０．１重量％以下よりなる群から選ばれる１種又は２種以上を含んでいても良い。
【０００７】
上記組成範囲の合金であれば、強度、加工性、熱的安定性を損なうことなく、摺動特性を片状黒鉛鋳鉄と同程度或いはそれ以上に向上させることができ、油切れ状態ないし高ＰＶ値条件下において異常摩耗を起こし難い耐摩耗性鋼を実現することができる。
【０００８】
【発明の実施の形態】
以下に本発明を詳細に説明する。
【０００９】
本発明の耐摩耗性鋼の合金組成は下記表１に示す通りである。
【００１０】
【表１】
炭素（Ｃ）が１．０重量％未満では、耐摩耗性が良好であるとは言えないが、Ｃが過度に多いと靭性が大幅に低下するので、Ｃの含有割合は１．５〜２．５０重量％である。
【００１２】
珪素（Ｓｉ）が０．８重量％未満では黒鉛化しにくいが、Ｓｉが過度に多いと靭性が大幅に低下するので、Ｓｉの含有割合は１．５０〜３．００重量％である。
【００１３】
マンガン（Ｍｎ）が０．８重量％未満では黒鉛化しにくいが、Ｍｎが過度に多いと靭性が大幅に低下するので、Ｍｎの含有割合は０．８０〜３．００重量％である。
【００１４】
ニッケル（Ｎｉ）は、機械的性質を向上するためのものであるが３．０重量％を超えると耐スカッフ性が低下する。Ｎｉの含有割合は２．０重量％以下である。
【００１５】
アルミニウム（Ａｌ）は黒鉛化、および脱酸するためのものであるが、１．０重量％を超えると靭性が大幅に低下する。Ａｌの含有割合は０．５重量％以下である。
【００１６】
硫黄（Ｓ）が０．０１重量％を超えると靭性が低下するので、０．０１重量％以下とする。
【００１７】
モリブデン（Ｍｏ）の存在で熱的特性の向上という効果が得られるが、Ｍｏが５．０重量％を超えると靭性が低下する。Ｍｏの含有割合は０．２０〜２．０重量％である。
【００１８】
タングステン（Ｗ）は、熱的特性を向上するためのものであるが、１．５重量％を超えると靭性が低下する。Ｗの含有割合は０．８重量％以下である。
【００１９】
バナジウム（Ｖ）は、熱的特性を向上するためのものであるが、Ｖが２．０重量％を超えると靭性が低下する。Ｖの含有割合は１．０重量％以下である。
【００２０】
硼素（Ｂ）は、熱的特性を向上するためのものであるが、０．５重量％を超えると靭性が低下する。Ｂの含有割合は０．１０重量％以下である。
【００２１】
このような本発明の耐摩耗性鋼は、一般に下記のような通常の熱処理を施して使用に供される。また、このような熱処理の他、レーザ焼入れ処理又は深冷処理を施しても良い。
【００２２】
[熱処理方法及び条件]
焼入（温度：７６０℃〜８２０℃）→油中急冷→焼戻（温度１００℃〜６００℃）→放冷
本発明の耐摩耗性鋼は、内燃機関のシリンダ摺動部材（ピストンリング材料、シリンダライナー材料、ピストンスカート材料）、その他、各種摺動部材の構成材料及びボールミル材料として極めて有用である。
【００２３】
【実施例】
以下に実施例及び比較例を挙げて本発明をより具体的に説明する。
【００２４】
実施例１〜７，比較例１，２
表２に示す構成を有し、下記条件で熱処理を行った合金鋼について、下記試験を行ってその特性を調べ、結果を表２に示した。
【００２５】
[熱処理方法及び条件]
焼入（温度：７８０℃）→油中急冷→焼戻（温度５００℃）→放冷
[摺動特性]（ピンオンディスク試験及びアムスラー摩耗試験）
片状黒鉛鋳鉄以上
[機械的強度]
引張強度σＢ≧６０ｋｇ／ｍｍ２
伸び ε ≧１．５％
[熱的特性]（クリープ試験）
片状黒鉛鋳鉄以上
【００２６】
【表２】
表２より、本発明の耐摩耗性鋼は、機械的強度等に優れる上に、摺動特性が著しく良好で異常摩耗が改善されていることが明らかである。
【００２８】
【発明の効果】
以上詳述した通り、本発明によれば、強度、加工性、熱的安定性に優れる上に、摺動特性に優れ、油切れ状態ないし高ＰＶ値条件下において異常摩耗を起こし難い耐摩耗性鋼が提供される。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to wear-resistant steel, and in particular, has excellent sliding properties and high properties that are unlikely to cause abnormal wear under conditions of running out of oil or high PV (2.5 kg / mm 2 · m / sec) value. It relates to wear resistant steel.
[0002]
[Prior art]
Examples of wear-resistant steel used for piston rings and other sliding member applications of internal combustion engines such as diesel engines include tool steel, bearing steel, spring steel, and improved materials (including surface modified materials). .
[0003]
[Problems to be solved by the invention]
None of the conventional wear-resistant steels have sufficient sliding characteristics, and thus has a drawback that abnormal wear tends to occur under oil-out conditions or high PV value conditions.
[0004]
The present invention solves the above-mentioned conventional problems, and is excellent in strength, workability, and thermal stability, and also has excellent sliding properties and wear resistance that hardly causes abnormal wear under oil shortage conditions or high PV value conditions. The purpose is to provide steel.
[0005]
[Means for Solving the Problems]
The wear resistant steel of the present invention is
Carbon: 1.5-2.50 wt%,
Silicon: 1.50 to 3.00% by weight,
Manganese: 0.80 to 3.00% by weight,
Sulfur: 0.01% by weight or less Molybdenum: 0.20-2.0% by weight
And the balance Fe and unavoidable impurities .
[0006]
The wear-resistant steel of the present invention further comprises nickel: 3.0 wt% or less, aluminum: 1.0 wt% or less, tungsten: 1.5 wt% or less, vanadium: 2.0 wt% or less, and boron: 0 0.5 wt% or less, preferably nickel: 2.0 wt% or less, aluminum: 0.5 wt% or less, tungsten: 0.8 wt% or less, vanadium: 1.0 wt% or less, and boron: 0.1 You may contain 1 type, or 2 or more types chosen from the group which consists of weight% or less.
[0007]
If the alloy is in the above composition range, the sliding characteristics can be improved to the same level or higher than that of flake graphite cast iron without impairing the strength, workability, and thermal stability. It is possible to realize a wear-resistant steel that hardly causes abnormal wear under the value condition.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The present invention is described in detail below.
[0009]
Alloy sets formed of wear resisting steel of the present invention are as shown in Table 1 below.
[0010]
[Table 1]
In less than 1.0 wt% carbon (C), although the abrasion resistance can not be said to be good, since C is the tenacity too much decreases significantly, the content of C is 1. 5 to 2.50% by weight.
[0012]
If silicon (Si) is less than 0.8% by weight, it is difficult to graphitize, but if too much Si is present, the toughness is significantly reduced, so the Si content is 1.50 to 3.00% by weight.
[0013]
If manganese (Mn) is less than 0.8% by weight, it is difficult to graphitize, but if Mn is excessively large, toughness is significantly reduced, so the Mn content is 0.80 to 3.00% by weight.
[0014]
Nickel (Ni) is intended to improve mechanical properties, but when it exceeds 3.0% by weight, the scuff resistance is lowered. Containing organic proportion of Ni is 2.0 wt% or less.
[0015]
Aluminum (Al) is used for graphitization and deoxidation, but when it exceeds 1.0% by weight, the toughness is significantly reduced. Containing organic proportion of Al is less than 0.5 wt%.
[0016]
If sulfur (S) exceeds 0.01% by weight, the toughness decreases, so the content is made 0.01% by weight or less.
[0017]
In the presence of molybdenum (Mo), the effect of improving the thermal characteristics can be obtained, but when Mo exceeds 5.0% by weight, the toughness decreases. Containing organic ratio of Mo is from 0.20 to 2.0% by weight.
[0018]
Tungsten (W) is intended to improve thermal characteristics, but when it exceeds 1.5% by weight, the toughness decreases. W containing organic ratio of 0.8 wt% or less.
[0019]
Vanadium (V) is for improving the thermal characteristics, but when V exceeds 2.0% by weight, the toughness decreases. Containing organic proportion of V is 1.0 wt% or less.
[0020]
Boron (B) is for improving the thermal characteristics, but if it exceeds 0.5% by weight, the toughness decreases. Containing organic proportion of B is 0.10 wt% or less.
[0021]
Such wear-resistant steel of the present invention is generally used after being subjected to the following normal heat treatment. In addition to such heat treatment, laser hardening treatment or deep cooling treatment may be performed.
[0022]
[Heat treatment method and conditions]
Quenching (temperature: 760 ° C. to 820 ° C.) → rapid quenching in oil → tempering (temperature 100 ° C. to 600 ° C.) → cooling The wear resistant steel of the present invention is a cylinder sliding member (piston ring material, Cylinder liner material, piston skirt material), and other components for various sliding members and ball mill materials.
[0023]
【Example】
Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples.
[0024]
Examples 1 to 7, Comparative Examples 1 and 2
The alloy steel having the structure shown in Table 2 and heat-treated under the following conditions was subjected to the following test to investigate its characteristics. The results are shown in Table 2.
[0025]
[Heat treatment method and conditions]
Quenching (temperature: 780 ° C) → quenching in oil → tempering (temperature 500 ° C) → cooling
[Sliding characteristics] (Pin-on-disk test and Amsler wear test)
More than flake graphite cast iron
[Mechanical strength]
Tensile strength σ B ≧ 60kg / mm 2
Elongation ε ≧ 1.5%
[Thermal characteristics] (Creep test)
More than flake graphite cast iron 【0026】
[Table 2]
From Table 2, it is clear that the wear-resistant steel of the present invention is excellent in mechanical strength and the like, and has excellent sliding properties and improved abnormal wear.
[0028]
【The invention's effect】
As described above in detail, according to the present invention, in addition to being excellent in strength, workability, and thermal stability, it is excellent in sliding properties and wear resistance that is unlikely to cause abnormal wear under conditions of running out of oil or high PV value. Steel is provided.
Claims (2)
珪素：１．５０〜３．００重量％、
マンガン：０．８〜３．００重量％、
硫黄：０．０１重量％以下及び
モリブデン：０．２０〜２．０重量％
を含み、残部Ｆｅ及び不可避的不純物よりなることを特徴とする耐摩耗性鋼。Carbon: 1.5-2.50 wt%,
Silicon: 1.50 to 3.00% by weight,
Manganese: 0.8 to 3.00% by weight,
Sulfur: 0.01% by weight or less Molybdenum: 0.20-2.0% by weight
A wear-resistant steel comprising the balance Fe and inevitable impurities .
珪素：１．５０〜３．００重量％、
マンガン：０．８〜３．００重量％、
硫黄：０．０１重量％以下及び
モリブデン：０．２０〜２．０重量％と、
ニッケル：２．０重量％以下、アルミニウム：０．５重量％以下、タングステン：０．８重量％以下、バナジウム：１．０重量％以下及び硼素：０．１重量％以下よりなる群から選ばれる１種又は２種以上とを含み、残部Ｆｅ及び不可避的不純物よりなることを特徴とする耐摩耗性鋼。Carbon: 1.5-2.50 wt%,
Silicon: 1.50 to 3.00% by weight,
Manganese: 0.8 to 3.00% by weight,
Sulfur: 0.01 wt% or less and molybdenum: 0.20-2.0 wt%,
Selected from the group consisting of nickel: 2.0 wt% or less, aluminum: 0.5 wt% or less, tungsten: 0.8 wt% or less, vanadium: 1.0 wt% or less, and boron: 0.1 wt% or less. A wear-resistant steel comprising one or two or more types, the balance being Fe and inevitable impurities .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29555697A JP3874133B2 (en) | 1997-10-28 | 1997-10-28 | Wear-resistant steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29555697A JP3874133B2 (en) | 1997-10-28 | 1997-10-28 | Wear-resistant steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11131180A JPH11131180A (en) | 1999-05-18 |
| JP3874133B2 true JP3874133B2 (en) | 2007-01-31 |
Family
ID=17822177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29555697A Expired - Fee Related JP3874133B2 (en) | 1997-10-28 | 1997-10-28 | Wear-resistant steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3874133B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5274762B2 (en) * | 2006-10-17 | 2013-08-28 | 電気興業株式会社 | Heat treatment method |
| US8845831B2 (en) | 2009-02-02 | 2014-09-30 | Denki Kogyo Co., Ltd. | Heat treatment method |
| DE102009010728C5 (en) | 2009-02-26 | 2019-08-14 | Federal-Mogul Burscheid Gmbh | Piston rings and cylinder liners |
| CN103205635A (en) * | 2013-04-10 | 2013-07-17 | 江苏迅达复合材料科技有限公司 | Method for producing VD high-alloyed tool steel |
| CN104498824A (en) * | 2014-12-02 | 2015-04-08 | 阜新蒙古族自治县晟宇铸造有限公司 | High-wear-resistance steel and preparation method thereof |
-
1997
- 1997-10-28 JP JP29555697A patent/JP3874133B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11131180A (en) | 1999-05-18 |
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