JPH03243743A - Wear-resistant steel for ordinary and medium temperature use having high hardness in medium and ordinary temperature range - Google Patents
Wear-resistant steel for ordinary and medium temperature use having high hardness in medium and ordinary temperature rangeInfo
- Publication number
- JPH03243743A JPH03243743A JP3743190A JP3743190A JPH03243743A JP H03243743 A JPH03243743 A JP H03243743A JP 3743190 A JP3743190 A JP 3743190A JP 3743190 A JP3743190 A JP 3743190A JP H03243743 A JPH03243743 A JP H03243743A
- Authority
- JP
- Japan
- Prior art keywords
- hardness
- medium
- room temperature
- steel
- ordinary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 58
- 239000010959 steel Substances 0.000 title claims abstract description 58
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 12
- 239000012535 impurity Substances 0.000 claims abstract description 10
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims description 6
- 229910052796 boron Inorganic materials 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- 229910052720 vanadium Inorganic materials 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 235000019589 hardness Nutrition 0.000 description 84
- 230000000694 effects Effects 0.000 description 19
- 230000001965 increasing effect Effects 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 239000002893 slag Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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
- C22C38/04—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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、建設、土木分野で使用される産業機械・部品
・運搬機器（パワーショベル、ブルドーザ、ホッパ、パ
ケット等）等に用いられる耐摩耗鋼（常温ブリネル硬度
：ＨＢ≧３２１）に関するもので、特に、スラグ処理場
等で、対象とする材料（土砂、スラグ、岩等）が３００
’Ｃ〜４００’Ｃ程度の中湿度になっている場合にも高
硬度を有し、優れた耐摩耗性を示す中常温用耐摩耗鋼に
関する。[Detailed description of the invention] [Industrial application field] The present invention is a wear-resistant product used in industrial machinery, parts, transportation equipment (power shovels, bulldozers, hoppers, packets, etc.) used in the construction and civil engineering fields. This relates to steel (room-temperature Brinell hardness: HB≧321), especially in slag treatment plants where the target materials (soil, slag, rocks, etc.)
The present invention relates to a wear-resistant steel for use at medium and ordinary temperatures, which has high hardness and exhibits excellent wear resistance even when the humidity is at medium humidity of about 'C to 400'C.
建設、土木分野で使用される産業機械・部品・運搬機器
（パワーショベル、ブルドーザ、ホッパ、パケット等）
等に用いられる鋼は、それらの機械、機器、部品等の寿
命を長くするため、耐摩耗性に優れた耐摩耗鋼が使用さ
れている。鋼の耐摩耗性は、鋼の硬度を高くすることで
向上することから、（、ｒ、 Ｎｏ等の合金元素を添加
した合金鋼を焼入等の熱処理を行って製造する高硬度鋼
が使用されてきた。Industrial machinery, parts, and transportation equipment used in construction and civil engineering fields (power shovels, bulldozers, hoppers, packets, etc.)
In order to extend the life of these machines, equipment, parts, etc., wear-resistant steel with excellent wear resistance is used. The wear resistance of steel can be improved by increasing the hardness of the steel, so high-hardness steel is used, which is manufactured by heat-treating alloy steel with alloying elements such as (, r, and no) added. It has been.
これらの高硬度鋼は、特開昭６２−１４２７２６号、特
開昭６３−１６９３５９号、特開平１−１４２０２３号
等に示されるように常温で高硬度が確保されるように製
造されており、取り分けこれら３つの先行技術では常温
の硬度（ＨＢ等）を約３００以上にし、更に夫々溶接性
、靭性、曲げ加工性等の改善が図られている。These high-hardness steels are manufactured to ensure high hardness at room temperature, as shown in JP-A-62-142726, JP-A-63-169359, JP-A-1-142023, etc. Particularly, in these three prior arts, the room temperature hardness (HB, etc.) is set at about 300 or more, and further improvements are made in weldability, toughness, bending workability, etc., respectively.
しかし、スラグ処理場等では、上記の産業機械や運搬機
器等により処理される土砂、スラグ、岩等が３００〜４
００℃程度の中湿度まで達し、常温での使用を前提とし
たこれまでの耐摩耗鋼ではその硬度を保持しておくこと
が難しく、実際の使用には不十分であった。However, at slag treatment plants, etc., the amount of soil, slag, rocks, etc. processed by the above-mentioned industrial machinery and transportation equipment is 300 to 40%.
With conventional wear-resistant steels that are designed to be used at room temperatures, which can reach medium humidity levels of around 00°C, it is difficult to maintain that hardness, making them insufficient for actual use.
一方、これまでに中温度域で良好な耐摩耗性を有する耐
摩耗鋼が実用化されておらず、常温での耐摩耗性に優れ
るこれまでの鋼を使用せざるを得なかった。On the other hand, no wear-resistant steel that has good wear resistance in the medium temperature range has been put into practical use so far, and conventional steels that have excellent wear resistance at room temperature have to be used.
本発明は以上の様な従来技術の問題を解決するためなさ
れたもので、常温ばかりでなく３００〜４００℃程度の
中温度域でも優れた耐摩耗性を保持する鋼を提供せんと
するものである。The present invention was made to solve the problems of the prior art as described above, and aims to provide a steel that maintains excellent wear resistance not only at room temperature but also in the medium temperature range of 300 to 400 degrees Celsius. be.
上記の様にスラグ処理場等での使用を考えた場合、そこ
で用いられる機器等には、■常温でＨＢ≧３００の高い
硬度を有し、■３００〜４００℃程度の中温度域におい
ても十分に高い硬度を有しているということが望まれる
。As mentioned above, when considering use in slag treatment plants, etc., the equipment used there should: ■ have a high hardness of HB ≥ 300 at room temperature, and ■ have sufficient hardness even in the medium temperature range of 300 to 400 degrees Celsius. It is desired that the material has high hardness.
中温度域で高い硬度を確保する一つの方法としては、中
温度域での硬度の低下分を考慮して常温での硬度をより
高くすることが考えられるが、この方法では常温硬度が
著しく高くなり、加工性、延靭性が低下すると共に溶接
性も劣化する。そのため常温での硬度を著しく高めるこ
となく、中温度域での硬度低下を小さくし、中温度域で
も十分高い硬度を確保できれば、それが一番望ましいも
のとなる。特にスラブ処理現場における処理対象やその
環境を考えた場合、この様な中温度域での硬度の目標値
としては、３００℃程度以下では常温硬度の９０％以上
、４００℃程度では常温硬度の７０％以上を確保したい
。One way to ensure high hardness in the medium temperature range is to increase the hardness at room temperature by taking into account the decrease in hardness in the medium temperature range, but this method results in significantly higher hardness at room temperature. As a result, workability, ductility and toughness are reduced, and weldability is also deteriorated. Therefore, it would be most desirable if the decrease in hardness in the medium temperature range could be reduced without significantly increasing the hardness at room temperature, and if a sufficiently high hardness could be ensured even in the medium temperature range. Especially when considering the processing target and its environment at a slab processing site, the target value for hardness in such a medium temperature range is 90% or more of room temperature hardness at about 300℃ or less, and 70% of room temperature hardness at about 400℃. I want to secure more than %.
この様な要請の基に、本発明者等による鋭意研鑵の結果
、Ｓｉの添加が中温度域における硬度確保に有効である
ことを見い出し、本発明の耐摩耗鋼はＳｉ量を通常より
多くして、常温ばかりでなく中温度域でも高い硬度が確
保できるようなものにした。Based on such requests, the inventors of the present invention conducted intensive research and found that the addition of Si is effective in ensuring hardness in the medium temperature range, and the wear-resistant steel of the present invention has a higher amount of Si than usual. This made it possible to ensure high hardness not only at room temperature but also in the medium temperature range.
添付図面は本発明者等の行った試験で得られたＳｉ添加
量と中室温域における硬度の関係を示すグラフ図である
。同図によれば、常温硬度はＳｉ添加量が増加してもほ
とんど変化せず、ＨＢ＝約５００であるが、３００℃で
の硬度はＳｉ添加量が約０．８ｗｔ％以上で高い値を示
し、ＨＢ （３００℃）／ＨＢ（常温）２９０％である
。又４００℃においても、Ｓｉ添加量と共に硬度は高く
なり、特に１ 、６ｗｔ％以上で顕著な硬度上昇があり
、４００℃近傍の温度域でもその効果が示される。The attached drawing is a graph showing the relationship between the amount of Si added and the hardness in the medium room temperature range, which was obtained in a test conducted by the present inventors. According to the same figure, the hardness at room temperature hardly changes even if the amount of Si added increases, and is HB=about 500, but the hardness at 300°C shows a high value when the amount of Si added is about 0.8 wt% or more. HB (300°C)/HB (normal temperature) 290%. Further, even at 400°C, the hardness increases with the amount of Si added, and in particular, there is a remarkable increase in hardness at 1.6 wt% or more, and this effect is exhibited even in the temperature range around 400°C.
この様に、Ｓｉ添加は常温での硬度を上昇させることな
く中温度域での硬度上昇にのみ効果がある。In this way, the addition of Si is effective only in increasing the hardness in the medium temperature range without increasing the hardness at room temperature.
Ｓｉによる中温度域での硬度上昇効果は３００℃程度ま
では、約０．８ｗｔ％以上であればその効果が現われ始
める。４００℃程度では１ 、６ｗｔ％以上で顕著な効
果があるが、１ 、６ｗｔ％以下でも添加量と共に硬度
上昇効果が認められる。５００℃以上においても、Ｓｉ
添加による硬度上昇効果は認められるが、その効果は小
さくなっている。上述の様に中温度域における硬度の目
標値は、３００℃程度以下で常温硬度の９０％以上、４
００°Ｃ程度で常温効果の７０％以上であるので、この
目標値に従えば中室温域で安定して高い硬度を得るため
には、Ｓｉ添加量を０．８ｔｇｔ％以上にする必要があ
る。The hardness increasing effect of Si in the medium temperature range starts to appear up to about 300° C. when the content is about 0.8 wt% or more. At about 400° C., there is a noticeable effect at 1.6 wt% or more, but even at 1.6 wt% or less, the effect of increasing hardness is observed as the amount added increases. Even at temperatures above 500°C, Si
Although the effect of increasing hardness due to addition is recognized, the effect is small. As mentioned above, the target value of hardness in the medium temperature range is 90% or more of room temperature hardness at about 300℃ or less, 4
Since the room temperature effect is more than 70% at around 00°C, according to this target value, in order to obtain stable high hardness in the medium room temperature range, the amount of Si added must be 0.8tgt% or more. .
この様な実験結果を基に本発明は創案されたものであり
、次の様な構成からなる。The present invention was devised based on such experimental results, and consists of the following configuration.
まず本願第１発明の耐摩耗鋼の構成は、Ｃ：０．０８〜
０．４ｗｔ％、Ｓｉ ： ０．８〜２，５ｗｔ％、Ｍｎ
： ０．１−２．０ＩＩＩｔ％を含み、残部Ｆｅおよ
び不可避不純物から成る鋼で、常温ブリネル硬度（ＨＢ
）≧３２１であることを基本的特徴としている。First, the structure of the wear-resistant steel of the first invention of the present application is C: 0.08~
0.4wt%, Si: 0.8-2.5wt%, Mn
: A steel containing 0.1-2.0IIIt%, the balance consisting of Fe and unavoidable impurities, and has a Brinell hardness at room temperature (HB
)≧321.
又第２発明では、Ｃ： ０．０８〜０．４す１％、Ｓｉ
： ０．８〜２．５ｗｔ％、Ｍｎ ： ０．１〜２．
０ｗｔ％を含有すると共に、Ｃｕ ： ０．１〜２，０
ｔｉｔ％、 Ｎｉ ： ０．１〜１０．０ｗｔ％、Ｃｒ
：０．１〜３．０ｗｔ％、Ｍｏ：０．１〜３．０ｗｔ％
、Ｂ ： ０．０００３〜０．０１ｗｔ％の元素の内１
種又は２種以上を含み、残部Ｆｅおよび不可避不純物か
ら戒る鋼で、常温ブリネル硬度（ＨＢ ）≧３２１であ
ることを特徴としている。Further, in the second invention, C: 0.08 to 0.41%, Si
: 0.8-2.5wt%, Mn: 0.1-2.
Contains 0 wt% and Cu: 0.1 to 2.0
tit%, Ni: 0.1-10.0wt%, Cr
:0.1-3.0wt%, Mo:0.1-3.0wt%
, B: 1 of the elements of 0.0003 to 0.01 wt%
This steel is characterized by containing one or more types of iron, remaining Fe and unavoidable impurities, and having a Brinell hardness (HB) at room temperature of 321 or more.
更に第３発明では、Ｃ： ０．０８〜０．４ｗｔ％、Ｓ
ｉ：０．８〜２．５ｗｔ％、Ｍｎ ： ０．１〜２．０
ｗｔ％を含有すると共に、Ｎｂ ： ０．００５〜Ｏ，
１ｗｔ％、Ｖ ： ０．０１〜０，１ｔｙｔ％、Ｔｉ：
ｏ、ｏｏｓ〜０．１ｗｔ％の元素の内１種又は２種以上
を含み、残部Ｆｅおよび不可避不純物から成る鋼で、常
温ブリネル硬度（ＨＢ）≧３２１であることを特徴とし
ている。Furthermore, in the third invention, C: 0.08 to 0.4 wt%, S
i: 0.8-2.5wt%, Mn: 0.1-2.0
Nb: 0.005~O,
1wt%, V: 0.01-0.1tyt%, Ti:
A steel containing one or more of the following elements: o, oos to 0.1 wt%, with the balance consisting of Fe and unavoidable impurities, and is characterized by a room temperature Brinell hardness (HB) of 321 or more.
加えて第４発明では、ｃ ： ｏ、ｏａ〜０．４ｔｉｔ
％、Ｓｉ：０．８〜２．５ｗｔ％、Ｍｎ ： ０．１〜
２．０ｗｔ％を含有し、Ｃｕ：０．１〜２．０ｗｔ％、
Ｎｉ ： ０．１−１０．０ｗｔ％、Ｃｒ：０．１〜３
、Ｏｕｔ％、Ｍｏ：０．１〜３．（ｌｉｔ％、Ｂ ：
０．０００３〜０．０１ｗｔ％の元素の内１種又は２種
以上を含むと共に、更Ｌ；！ｂ ： ０．００５〜０．
１ｗｔ％、Ｖ ： ０．０１〜０．１．ｗｔ％、Ｔｉ：
ｏ、ｏｏｓ〜０．１ｗｔ％の元素の内１種又は２種以上
を含有し、残部Ｆｅおよび不可避不純物から戊る鋼で、
常温ブリネル硬度（ＨＢ ）≧３２１であることを特徴
としている。In addition, in the fourth invention, c: o, oa ~ 0.4tit
%, Si: 0.8~2.5wt%, Mn: 0.1~
Contains 2.0 wt%, Cu: 0.1 to 2.0 wt%,
Ni: 0.1-10.0wt%, Cr: 0.1-3
, Out%, Mo: 0.1-3. (lit%, B:
Contains 0.0003 to 0.01 wt% of one or more elements, and further contains L;! b: 0.005-0.
1wt%, V: 0.01-0.1. wt%, Ti:
A steel containing one or more of the elements o, oos ~ 0.1 wt%, with the remainder being Fe and unavoidable impurities,
It is characterized by a room temperature Brinell hardness (HB)≧321.
以下本発明の構成で規定する鋼の成分等につき、詳細に
説明する。The components of the steel specified in the structure of the present invention will be explained in detail below.
まず第１発明における鋼成分ではＦｅ及び不可避不純物
以外に必須の基本成分としてＣ，Ｓｉ、 Ｍｎの３戊分
を規定している。First, in the steel composition in the first invention, C, Si, and Mn are defined as essential basic components other than Fe and unavoidable impurities.
・Ｃ： ０．０８〜０．４ｗｔ％
Ｃは鋼の硬度を高める重要な元素であり、本発明のよう
な耐摩耗鋼で高い硬度を安定して確保するためには必須
の元素である。しかしながら、大量の添加は常温での硬
度を著しく高め加工性、延靭性を低下させるだけでなく
、溶接性も劣化させる。従って、高硬度を確保するため
の下限の添加量として０．０８ｗｔ％とし、上限として
０．４ｗｔ％とした。-C: 0.08 to 0.4 wt% C is an important element that increases the hardness of steel, and is an essential element in order to stably secure high hardness in wear-resistant steel such as the present invention. However, addition of a large amount not only significantly increases hardness at room temperature and reduces workability and ductility, but also deteriorates weldability. Therefore, the lower limit of the addition amount to ensure high hardness was set at 0.08 wt%, and the upper limit was set at 0.4 wt%.
・Ｓｉ ： ０．８〜２．５ｗｔ％
Ｓｉは、前記図面にも示したように常温硬度を高めるこ
となく、中温での硬度を向上させる有効な元素であり、
本発明の重要な構成因子である。中温硬度を高く維持す
るためには、少なくとも０ 、 ａｎｔ％以上の添加が
必要である。また、Ｓｉの大量添加はδフェライトを生
成することがあり、常温硬度が低下するとともにコスト
も高くなるため、上限を２．５ｗｔ％とした。-Si: 0.8 to 2.5 wt% Si is an effective element that improves the hardness at medium temperature without increasing the hardness at room temperature, as shown in the drawing above.
This is an important component of the present invention. In order to maintain high medium temperature hardness, it is necessary to add at least 0.0 ant% or more. Furthermore, addition of a large amount of Si may generate δ ferrite, which lowers hardness at room temperature and increases cost, so the upper limit was set at 2.5 wt%.
・Ｍｎ ： ０．１〜２．０ｗｔ％
Ｍｎは焼入性を高める元素であるが、０，１ｗｔ％未満
ではこの効果を発揮することができず、２．０ｗｔ％を
超える添加では、溶接性が劣化するとともに、コストが
上昇するので、０．１〜２．０ｗｔ％の範囲とする。・Mn: 0.1 to 2.0 wt% Mn is an element that improves hardenability, but if it is less than 0.1 wt%, it cannot exhibit this effect, and if it is added in excess of 2.0 wt%, it will reduce weldability. Since this causes deterioration and increases cost, the content is set in the range of 0.1 to 2.0 wt%.
これらの成分が規定される他、本発明では常温ブリネル
硬度についても規定される。In addition to specifying these components, the present invention also specifies room-temperature Brinell hardness.
・常温ブリネル硬度≧３２１
本発明で常温ブリネル硬度について規定したのは、常温
における耐摩耗性の確保という要請があることもさるこ
とながら、ＳＬ等の含有量が上述の範囲に調整されてい
ても常温ブリネル硬度がある値を境にそれを下回る場合
には、中温度域における硬度の低下が著しくなり、本発
明の目的を達成することができなくなるからである。本
発明者等の実験結果によれば、常温ブリネル硬度が３２
１を下回る場合、ＨＢ（３００℃）／ＨＢ（常＠）＜９
０％又はＨＢ （４００℃）／ＨＢ（常温）＜７０％と
なることが明らかとなったので、この常温ブリネル硬度
の下限値を３２１と規定した。・Room temperature Brinell hardness ≧ 321 The reason why the room temperature Brinell hardness is specified in the present invention is that there is a need to ensure wear resistance at room temperature, and even if the content of SL etc. is adjusted to the above range. This is because if the room temperature Brinell hardness falls below a certain value, the hardness decreases significantly in the medium temperature range, making it impossible to achieve the object of the present invention. According to the experimental results of the present inventors, the Brinell hardness at room temperature is 32.
If it is less than 1, HB(300℃)/HB(normal@)<9
0% or HB (400° C.)/HB (room temperature) < 70%, so the lower limit of this room temperature Brinell hardness was defined as 321.
但し、上述の様に常温ブリネル硬度を極端に高くした場
合、加工性、延靭性、溶接性の劣化が著しくなるので、
これら諸性能の許要限度に応じて常温ブリネル硬度を適
宜設定し、約５５０以上にならないようにするのが望ま
しい。However, as mentioned above, if the room temperature Brinell hardness is made extremely high, the deterioration of workability, ductility, and weldability will be significant.
It is desirable to appropriately set the normal temperature Brinell hardness according to the permissible limits of these various performances, and keep it from exceeding about 550.
次に第２発明では、上記第１発明の成分以外にもＣｕ、
Ｎｉ、 Ｃｒ、 Ｍｏ、 Ｂのうち１種乃至２種以上
を含むこととしている。又、常温ブリネル硬度条件につ
いても同様な理由で規定した。Next, in the second invention, in addition to the components of the first invention, Cu,
It is assumed that one or more of Ni, Cr, Mo, and B are included. Further, room temperature Brinell hardness conditions were also specified for the same reason.
・Ｃｕ ： ０．１〜２．０ｗｔ％
Ｃｕは焼入性を高める元素であり２本発明のように常温
硬度を高く維持するためには有効な元素であるが、０．
ｈｔ％未満ではこの効果を発揮することができず、２．
（ｈｔ％を超える添加では、熱間加工性が低下するとと
もに、コストも上昇するので、０．１〜２．０ｗｔ％の
範囲とする。・Cu: 0.1 to 2.0 wt% Cu is an element that improves hardenability and is an effective element for maintaining high room temperature hardness as in the present invention, but 0.1 to 2.0 wt%
If the content is less than ht%, this effect cannot be exhibited, and 2.
(Addition of more than ht% lowers hot workability and increases cost, so the range is set to 0.1 to 2.0 wt%.
・Ｎｉ ： ０．１〜１０．０ｉｇｔ％Ｎｉは焼入性を
高めるとともに、低温靭性を向上させる元素であるが、
０，１ｗｔ％未満ではこの効果を発揮することができず
、 １０．０ｗｔ％を超える添加では、コストが顕著に
上昇するので、０．１〜１０．０ｗｔ％の範囲とする。・Ni: 0.1 to 10.0igt%Ni is an element that improves hardenability and low-temperature toughness,
If it is less than 0.1 wt%, this effect cannot be exhibited, and if it is added in excess of 10.0 wt%, the cost will increase significantly, so the range is set from 0.1 to 10.0 wt%.
・Ｃｒ ： ０．１〜３．０ｗｔ％
Ｃｒは焼入性を高める元素であるが、Ｏ，１ｗｔ％未満
ではこの効果を発揮することができず。- Cr: 0.1 to 3.0 wt% Cr is an element that improves hardenability, but this effect cannot be exhibited if O is less than 1 wt%.
３ 、０ｗｔ％を超える添加では、溶接性が劣化すると
ともに、コストが上昇するので、０．１〜３．（ｈｔ％
の範囲とする。3. Addition of more than 0 wt% deteriorates weldability and increases cost; therefore, addition of 0.1 to 3. (ht%
The range shall be .
・Ｍｏ ： ０．１〜３．０ｗｔ％
Ｍｏは焼入性を高める元素であるが、０，１ｗｔ％未満
ではこの効果を発揮することができず、３、（ｈｔ％を
超える添加では、溶接性が劣化するとともに、コストが
上昇するので、０．１〜３．（ｈｔ％の範囲とする。・Mo: 0.1 to 3.0 wt% Mo is an element that improves hardenability, but if it is less than 0.1 wt%, it cannot exhibit this effect, and if it is added in excess of 3. Since the properties deteriorate and the cost increases, it is set in the range of 0.1 to 3.(ht%).
・Ｂ ： ０．０００３〜０．０１ｗｔ％Ｂは微量添加
で焼入性を高める元素であるが、０．０００３ｗｔ％未
満ではこの効果を発揮することができず、０．０１ｗｔ
％を超える添加では、溶接性が劣化するとともに、むし
ろ焼入性が低下するので、０．０００３〜０．０１ｗｔ
％の範囲とする。・B: 0.0003 to 0.01wt% B is an element that improves hardenability when added in a small amount, but this effect cannot be exhibited at less than 0.0003wt%, and 0.01wt%
If the addition exceeds 0.0003 to 0.01wt, the weldability will deteriorate and the hardenability will also decrease.
% range.
そして第３発明では、上述の第１発明の成分以外にＮｂ
、 Ｖ、 Ｔｉのうち１種又は２種以上を含むこととし
ている。ここでも常温ブリネル硬度条件については同様
な理由で規定した。In the third invention, in addition to the components of the first invention, Nb
, V, and Ti. Here too, the room temperature Brinell hardness conditions were specified for the same reason.
・Ｎｂ ： ０．００５〜０．１ｗｔ％Ｎｂは析出強度
に有効な元素であり、鋼の硬度を上昇させる効果を有し
ているが、０．００５ｗｔ％未満ではこの効果を発揮す
ることができず。・Nb: 0.005 to 0.1 wt% Nb is an effective element for precipitation strength and has the effect of increasing the hardness of steel, but if it is less than 0.005 wt%, it cannot exhibit this effect. figure.
０．１ｗｔ％を超える添加では溶接性が劣化するので、
ｏ、ｏｏｓ〜０．１ｗｔ％の範囲とする。Addition of more than 0.1 wt% deteriorates weldability, so
o, oos to 0.1 wt%.
・Ｖ ： ０．０１〜０．１ｗｔ％
■は析出強化に有効な元素であり、鋼の硬度を上昇させ
る効果を有しているが、０．０１ｗｔ％未満ではこの効
果を発揮することができず、０．１ｗｔ％を超える添加
では溶接性が劣化するので、０．Ｏ１〜０．１ｗｔ％の
範囲とする。・V: 0.01 to 0.1 wt% ■ is an effective element for precipitation strengthening and has the effect of increasing the hardness of steel, but if it is less than 0.01 wt%, this effect cannot be exhibited. However, if the addition exceeds 0.1 wt%, weldability deteriorates, so if the addition exceeds 0.1 wt%, weldability will deteriorate. The range is O1 to 0.1 wt%.
・Ｔｉ ： ０．００５〜０．１ｗｔ％Ｔｉは析出強化
に有効な元素であり、鋼の硬度を上昇させる効果を有し
ているが、０．００５ｗｔ％未満ではこの効果を発揮す
ることができず、０、 １ｗｔ％を超える添加では溶接
性が劣化するので、０，００５〜０．１ｗｔ％の範囲と
する。・Ti: 0.005 to 0.1 wt% Ti is an effective element for precipitation strengthening and has the effect of increasing the hardness of steel, but if it is less than 0.005 wt%, it cannot exhibit this effect. First, if it is added in excess of 0.1 wt%, weldability deteriorates, so the content should be in the range of 0,005 to 0.1 wt%.
更に第４発明では、第１発明の基本成分の他、第２発明
で示した５戒分のうち少なくとも１種以上を含み、加え
て第３発明で示した３成分のうち少なくともこれらを１
種以上含有するようにしており、夫々の成分限定理由に
ついては同じであるのでその詳細は省略する。又常温ブ
リネル硬度条件も同様な理由で規定した。Furthermore, the fourth invention includes, in addition to the basic components of the first invention, at least one of the five precepts shown in the second invention, and in addition, at least one of the three components shown in the third invention.
Since the reasons for limiting each component are the same, details thereof will be omitted. Further, room temperature Brinell hardness conditions were also specified for the same reason.
尚、本発明においては、加工方法、熱処理方法等に関し
ても何等規定する必要がなく、焼入処理、焼戻処理、時
効処理、応力除去焼鈍等の熱処理を実施しても本発明の
目的を損なうものではない。In addition, in the present invention, there is no need to specify any processing method, heat treatment method, etc., and even if heat treatment such as quenching treatment, tempering treatment, aging treatment, stress relief annealing, etc. is performed, the purpose of the present invention will be lost. It's not a thing.
本発明者等は下記衣１に成分組成の示されたものを表２
のプロセスに従って製造し、鋼Ａ乃至Ｏを得た。これら
の特性値を調べ、夫々常温硬度（ＨＢ（ＲＴ）） 、中
温硬度（ＨＢ （３００℃）、ＨＢ（４００℃）〕、及
び上記常温硬度に対する中温硬度の比率として表２に示
した（この比率は中温硬度の各位の脇に示されている）
。The present inventors added the ingredients shown in Table 2 to Clothing 1 below.
Steels A to O were obtained. These characteristic values were investigated and shown in Table 2 as room temperature hardness (HB (RT)), medium temperature hardness (HB (300℃), HB (400℃)), and the ratio of medium temperature hardness to the above room temperature hardness. Ratios are shown beside each medium hardness level)
.
表 ２
製造方法
特性値
注）板厚：全て１５ｍ＋ｎ材のデータ例ＲＱ：普通圧延
後空冷→９００℃加熱後焼入ＲＱＴ：ＲＱ後、焼戻処理
（）の数字が処理温度ＤＱ ： １１００℃スラグ加
熱−９００℃圧延仕上げ後−直接焼入ＤＱＴ：ＤＱ後、
焼戻処理
ＨＢ（ＲＴ） ：常温での表面ブリネル硬度の実測値Ｈ
ａ （３００℃）：３００℃でのブリネル硬度（引張試
験結果からの換算値））ＩＱ（４００℃）：４００℃で
のブリネル硬度（引張試験結果からの換算値）木：（％
）表示は、）ＩＢ （ＲＴ）との比率＜ＥＸ＞ ＨＢ（
３００℃）／ＨＢ（ＲＴ） ｏｒ ＨＢ（４００℃）／
Ｈ［１（ＲＴ）表中、鋼Ａ−Ｌは本発明鋼であり、鋼Ｍ
〜Ｏは比較鋼である。本発明鋼Ａ−Ｃは、基本成分系で
Ｓｉの添加量を変化させたものであり、本発明鋼Ｄ〜Ｌ
は、基本成分系にその他の合金元素を添加した鋼である
。比較鋼Ｍ、Ｏは本発明のＳｉ添加量の範囲以下であり
、また比較鋼ＮはＣ添加量が本発明の範囲以外である。Table 2 Manufacturing method characteristic values Note) Plate thickness: Data example for all 15m+n materials RQ: Normal rolling followed by air cooling → 900°C heating followed by quenching RQT: After RQ, the number in parentheses indicates the processing temperature DQ: 1100°C slag Heating - After rolling at 900°C - Direct quenching DQT: After DQ,
Tempering treatment HB (RT): Actual value H of surface Brinell hardness at room temperature
a (300°C): Brinell hardness at 300°C (converted value from tensile test results)) IQ (400°C): Brinell hardness at 400°C (converted value from tensile test results) Wood: (%
) Display is the ratio of ) IB (RT) <EX> HB (
300℃)/HB(RT) or HB(400℃)/
H [1 (RT) In the table, steels A-L are the steels of the present invention, and steel M
-O is comparative steel. Inventive steels A-C are those in which the amount of Si added is changed in the basic composition system, and inventive steels D to L
is a steel with other alloying elements added to the basic composition system. Comparative steels M and O have a Si addition amount below the range of the present invention, and comparative steel N has a C addition amount outside the range of the present invention.
本発明鋼である鋼Ａ−Ｌでは、それぞれの化学成分に応
じて常温硬度は異なっているが、ＨＢ≧３２１を満足す
る十分に高い値である。また、３００℃、４００℃での
中温硬度も十分に高くなっており、本発明の目標として
いる範囲（それぞれ常温硬度の９０％以上、７０％以上
）を満足している。また、製造プロセスもＲＱ、ＤＱお
よび焼戻処理の有無等いくつか実施しているが、どのプ
ロセスにおいても本発明の目標性能を満足している。Steels A-L, which are the steels of the present invention, have different room temperature hardnesses depending on their chemical components, but are sufficiently high values that satisfy HB≧321. Further, the medium temperature hardness at 300° C. and 400° C. is sufficiently high, and satisfies the target range of the present invention (90% or more and 70% or more of the room temperature hardness, respectively). In addition, several manufacturing processes were carried out, including RQ, DQ, and the presence or absence of tempering, but all of the processes satisfied the target performance of the present invention.
これに対し、比較鋼Ｍは、本発明鋼Ａ−Ｃの比較対象と
なる鋼であるが、Ｓｉ添加量が少なくなっている。該比
較鋼Ｍの常温硬度は本発明＠Ａ−Ｃとほぼ同等であり、
ＨＢ＝約５００を示すが、中温域での硬度は本発明鋼に
比較して低くなっており、特に３００℃での硬度は常温
硬度の８３％であり、本発明の目標値である９０％に達
していない。さらに、４００℃での硬度も常温硬度の６
６％と低く本発明での目安である７０％以上を満足して
いない。同様に、比較鋼Ｏは１本発明鋼Ｊの比較対象鋼
であり、常温硬度は本発明ＩＪとほぼ同等であるが、３
００℃、４００℃での硬度は規定値以下である。一方、
比較１１Ｎは、本発明鋼Ｂの比較対象鋼である。Ｓｉ添
加量は本発明の範囲内であるため、中温での硬度は高い
値であるが、Ｃ添加量が本発明の規定値以下となってい
るため、常温硬度ＨＢ≧３２１を満足していない。On the other hand, comparative steel M is a steel to be compared with the present invention steels A-C, but has a smaller amount of Si added. The room temperature hardness of the comparative steel M is almost the same as that of the present invention @A-C,
HB=approximately 500, but the hardness in the medium temperature range is lower than that of the steel of the present invention. In particular, the hardness at 300°C is 83% of the room temperature hardness, which is 90%, which is the target value of the present invention. has not been reached. Furthermore, the hardness at 400℃ is 6 of the room temperature hardness.
It is as low as 6%, which does not satisfy the standard of 70% or more according to the present invention. Similarly, comparative steel O is a steel to be compared with 1 inventive steel J, and has almost the same hardness at room temperature as inventive steel IJ, but 3
The hardness at 00°C and 400°C is below the specified value. on the other hand,
Comparison 11N is a steel to which the invention steel B is compared. Since the amount of Si added is within the range of the present invention, the hardness at medium temperature is a high value, but since the amount of C added is below the specified value of the present invention, the room temperature hardness HB≧321 is not satisfied. .
〔発明の効果）
以上のように、本発明によって、従来使用中の摩擦が顕
著で機械１部品等の寿命の短くなることの多かった中温
域で使用される従来の耐摩耗鋼に対して、中温域で良好
な耐摩耗性を有する耐摩耗鋼が得られ、機械、部品等の
中常温域での寿命を長くする効果がある。[Effects of the Invention] As described above, the present invention improves the wear resistance of conventional wear-resistant steels used in medium-temperature ranges, where friction during use was significant and often shortened the life of single machine parts. A wear-resistant steel with good wear resistance in the medium temperature range can be obtained, which has the effect of extending the life of machines, parts, etc. in the medium temperature range.
添付図面はＳｉ添加量と中室温硬度の関係を示すグラフ
図である。The attached drawing is a graph showing the relationship between the amount of Si added and the mid-room temperature hardness.
Claims (4)
．５ｗｔ％、Ｍｎ：０．１〜２．０ｗｔ％を含み、残部
Ｆｅおよび不可避不純物から成る鋼で、常温ブリネル硬
度（ＨＢ）≧３２１であることを特徴とする中常温域で
高い硬度を有する中常温用耐摩耗鋼。(1) C: 0.08-0.4wt%, Si: 0.8-2
．． 5 wt%, Mn: 0.1 to 2.0 wt%, and the balance is Fe and unavoidable impurities, and has high hardness in the medium temperature range, characterized by a room temperature Brinell hardness (HB) ≧ 321. Wear-resistant steel for room temperature use.
．５ｗｔ％、Ｍｎ：０．１〜２．０ｗｔ％を含有すると
共に、Ｃｕ：０．１〜２．０ｗｔ％、Ｎｉ：０．１〜１
０．０ｗｔ％、Ｃｒ：０．１〜３．０ｗｔ％、Ｍｏ：０
．１〜３．０ｗｔ％、Ｂ：０．０００３〜０．０１ｗｔ
％の元素の内１種又は２種以上を含み、残部Ｆｅおよび
不可避不純物から成る鋼で、常温ブリネル硬度（ＨＢ）
≧３２１であることを特徴とする中常温域で高い硬度を
有する中常温用耐摩耗鋼。(2) C: 0.08-0.4wt%, Si: 0.8-2
．． 5 wt%, Mn: 0.1 to 2.0 wt%, Cu: 0.1 to 2.0 wt%, Ni: 0.1 to 1
0.0wt%, Cr: 0.1-3.0wt%, Mo: 0
．． 1-3.0wt%, B: 0.0003-0.01wt
Steel containing one or more of the following elements, with the balance consisting of Fe and unavoidable impurities, and has a Brinell hardness (HB) of
A wear-resistant steel for medium to normal temperatures having high hardness in the medium to normal temperature range, characterized in that ≧321.
．５ｗｔ％、Ｍｎ：０．１〜２．０ｗｔ％を含有すると
共に、Ｎｂ：０．００５〜０．１ｗｔ％、Ｖ：０．０１
〜０．１ｗｔ％、Ｔｉ：０．００５〜０．１ｗｔ％の元
素の内１種又は２種以上を含み、残部Ｆｅおよび不可避
不純物から成る鋼で、常温ブリネル硬度（ＨＢ）≧３２
１であることを特徴とする中常温域で高い硬度を有する
中常温用耐摩耗鋼。(3) C: 0.08-0.4wt%, Si: 0.8-2
．． 5 wt%, Mn: 0.1 to 2.0 wt%, Nb: 0.005 to 0.1 wt%, V: 0.01
~0.1wt%, Ti: 0.005~0.1wt% of the elements, and the balance consists of Fe and unavoidable impurities, with a room temperature Brinell hardness (HB) ≧32.
1. A wear-resistant steel for medium to normal temperatures having high hardness in the medium to normal temperature range.
．５ｗｔ％、Ｍｎ：０．１〜２．０ｗｔ％を含有し、Ｃ
ｕ：０．１〜２．０ｗｔ％、Ｎｉ：０．１〜１０．０ｗ
ｔ％、Ｃｒ：０．１〜３．０ｗｔ％、Ｍｏ：０．１〜３
．０ｗｔ％、Ｂ：０．０００３〜０．０１ｗｔ％の元素
の内１種又は２種以上を含むと共に、更にＮｂ：０．０
０５〜０．１ｗｔ％、Ｖ：０．０１〜０．１ｗｔ％、Ｔ
ｉ：０．００５〜０．１ｗｔ％の元素の内１種又は２種
以上を含有し、残部Ｆｅおよび不可避不純物から成る鋼
で、常温ブリネル硬度（ＨＢ）≧３２１であることを特
徴とする中常温域で高い硬度を有する中常温用耐摩耗鋼
。(4) C: 0.08-0.4wt%, Si: 0.8-2
．． 5 wt%, Mn: 0.1 to 2.0 wt%, C
u: 0.1-2.0wt%, Ni: 0.1-10.0w
t%, Cr: 0.1-3.0wt%, Mo: 0.1-3
．． 0 wt%, B: 0.0003 to 0.01 wt%, containing one or more of the elements, and further Nb: 0.0
05-0.1wt%, V: 0.01-0.1wt%, T
i: A steel containing one or more of the following elements in an amount of 0.005 to 0.1 wt%, with the balance consisting of Fe and unavoidable impurities, and is characterized by having a Brinell hardness (HB) at room temperature of 321 or more. Wear-resistant steel for medium to room temperatures with high hardness in the room temperature range.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3743190A JPH03243743A (en) | 1990-02-20 | 1990-02-20 | Wear-resistant steel for ordinary and medium temperature use having high hardness in medium and ordinary temperature range |
| CA 2034874 CA2034874A1 (en) | 1990-02-20 | 1991-01-24 | Wear-resistant steel for intermediate and room temperature service |
| EP91101082A EP0445519A1 (en) | 1990-02-20 | 1991-01-28 | Wear-resistant steel for intermediate and room temperature service |
| FI910727A FI910727A (en) | 1990-02-20 | 1991-02-14 | NOETNINGSBESTAENDIGT STAOL FOER ATT ANVAENDAS VID MEDELHOEG OCH RUMSTEMPERATUR. |
| AU71078/91A AU7107891A (en) | 1990-02-20 | 1991-02-15 | Wear-resistant steel for intermediate and room temperature service |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3743190A JPH03243743A (en) | 1990-02-20 | 1990-02-20 | Wear-resistant steel for ordinary and medium temperature use having high hardness in medium and ordinary temperature range |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03243743A true JPH03243743A (en) | 1991-10-30 |
Family
ID=12497328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3743190A Pending JPH03243743A (en) | 1990-02-20 | 1990-02-20 | Wear-resistant steel for ordinary and medium temperature use having high hardness in medium and ordinary temperature range |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0445519A1 (en) |
| JP (1) | JPH03243743A (en) |
| AU (1) | AU7107891A (en) |
| CA (1) | CA2034874A1 (en) |
| FI (1) | FI910727A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293222C (en) * | 2003-12-11 | 2007-01-03 | 杨军 | Easy cut by flame abrasion-resistant steel in high rigidity, in toughness and preparation method |
| WO2009087990A1 (en) | 2008-01-07 | 2009-07-16 | Nippon Steel Corporation | Wear-resistant steel sheet having excellent wear resistant at high temperature and processability upon bending, and method for production thereof |
| US8684235B2 (en) | 2007-02-14 | 2014-04-01 | Kao Corporation | Trigger-type liquid sprayer |
| JP2017061721A (en) * | 2015-09-25 | 2017-03-30 | Ｊｆｅスチール株式会社 | Abrasion resistant steel sheet and manufacturing method therefor |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5131965A (en) * | 1990-12-24 | 1992-07-21 | Caterpillar Inc. | Deep hardening steel article having improved fracture toughness |
| US5366568A (en) * | 1993-10-13 | 1994-11-22 | Bruce Douglas G | Method of producing primarily tempered martensite steel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5442812A (en) * | 1977-09-12 | 1979-04-05 | Nat Jutaku Kenzai | Method of constructing building |
| JPS5565350A (en) * | 1978-11-10 | 1980-05-16 | Mitsubishi Heavy Ind Ltd | High toughness, wear resistant steel |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH317544A (en) * | 1956-06-07 | 1956-11-30 | Monteforno Acciajerie E Lamina | Structural steel |
| US2863763A (en) * | 1957-03-19 | 1958-12-09 | Samuel J Rosenberg | Ductile and tough high strength steel |
| SU266215A1 (en) * | 1968-01-09 | 1970-03-17 | Чел бинский ордена Ленина завод дорожных машин Колющенко | |
| GB1202513A (en) * | 1969-01-15 | 1970-08-19 | Stoody Co | Process of forming a layer of added steel to a steel workpiece |
| SU342941A1 (en) * | 1970-01-20 | 1972-06-22 | М. П. Браун, И. Н. Попов , Э. И. Мировский |
-
1990
- 1990-02-20 JP JP3743190A patent/JPH03243743A/en active Pending
-
1991
- 1991-01-24 CA CA 2034874 patent/CA2034874A1/en not_active Abandoned
- 1991-01-28 EP EP91101082A patent/EP0445519A1/en not_active Withdrawn
- 1991-02-14 FI FI910727A patent/FI910727A/en unknown
- 1991-02-15 AU AU71078/91A patent/AU7107891A/en not_active Abandoned
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5442812A (en) * | 1977-09-12 | 1979-04-05 | Nat Jutaku Kenzai | Method of constructing building |
| JPS5565350A (en) * | 1978-11-10 | 1980-05-16 | Mitsubishi Heavy Ind Ltd | High toughness, wear resistant steel |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293222C (en) * | 2003-12-11 | 2007-01-03 | 杨军 | Easy cut by flame abrasion-resistant steel in high rigidity, in toughness and preparation method |
| US8684235B2 (en) | 2007-02-14 | 2014-04-01 | Kao Corporation | Trigger-type liquid sprayer |
| WO2009087990A1 (en) | 2008-01-07 | 2009-07-16 | Nippon Steel Corporation | Wear-resistant steel sheet having excellent wear resistant at high temperature and processability upon bending, and method for production thereof |
| JP2017061721A (en) * | 2015-09-25 | 2017-03-30 | Ｊｆｅスチール株式会社 | Abrasion resistant steel sheet and manufacturing method therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0445519A1 (en) | 1991-09-11 |
| FI910727A0 (en) | 1991-02-14 |
| AU7107891A (en) | 1991-08-22 |
| CA2034874A1 (en) | 1991-08-21 |
| FI910727A (en) | 1991-08-21 |
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