JPS60128247A - Wear-resistant cast steel having high toughness - Google Patents
Wear-resistant cast steel having high toughnessInfo
- Publication number
- JPS60128247A JPS60128247A JP23636783A JP23636783A JPS60128247A JP S60128247 A JPS60128247 A JP S60128247A JP 23636783 A JP23636783 A JP 23636783A JP 23636783 A JP23636783 A JP 23636783A JP S60128247 A JPS60128247 A JP S60128247A
- Authority
- JP
- Japan
- Prior art keywords
- cast steel
- wear
- toughness
- wear resistance
- hardness
- 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.)
- Granted
Links
Landscapes
- Heat Treatment Of Articles (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は主として破砕機、粉砕ミルのライナや中仕切
目板などに使用する高靭性耐摩耗鋳鋼に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-toughness, wear-resistant cast steel mainly used for liners, partition plates, etc. of crushers and grinding mills.
最近では、工業の発達に伴って、破砕機、粉砕ミルは次
第に大型化しており、その使用条件も増々苛酷に々って
いる。Recently, with the development of industry, crushers and grinding mills have gradually become larger in size, and the conditions for their use have become increasingly severe.
′このため、一段と高い靭性と耐摩耗性が要求されるよ
うになってきた。'For this reason, even higher toughness and wear resistance are now required.
従来は、これら耐摩耗鋳鋼品は、高クロム鋳鉄。Traditionally, these wear-resistant cast steel products were made of high chromium cast iron.
高マンガン鋳鋼、低合金鋼などで作られている。It is made of high manganese cast steel, low alloy steel, etc.
一般に、耐摩耗性を向上させるために硬度を高くすると
靭性が低下し、又、靭性を向上させようとすると耐摩耗
性が低下する傾向がある。Generally, when hardness is increased to improve wear resistance, toughness tends to decrease, and when trying to improve toughness, wear resistance tends to decrease.
たとえば、高マンガン鋼は極めて靭性が高いが。For example, high manganese steel is extremely tough.
耐摩耗性はあまりよくない。他方、高クロム鋳鉄は、耐
摩耗性は非常に優れているが、靭性が低い。Abrasion resistance is not very good. On the other hand, high chromium cast iron has very good wear resistance but low toughness.
靭性と耐摩耗性を同時に満足する材質はいまた得られて
いない。A material that satisfies both toughness and wear resistance has not yet been obtained.
そこで９本発明者らは、比較的に良好な靭性と耐摩耗性
を兼そ々えている低合金鋼に注目し２種々検討した結果
、安価で従来の低合金鋼よりもはるかに高い靭性と耐摩
耗性をもつ高靭性耐摩耗鋳鋼を開発した。Therefore, the present inventors focused on low-alloy steel, which has both relatively good toughness and wear resistance, and as a result of examining two different types, they found that it is inexpensive and has much higher toughness than conventional low-alloy steel. We have developed a high-toughness, wear-resistant cast steel with wear resistance.
以下１本発明を説明する。One aspect of the present invention will be explained below.
本発明の高靭性耐摩耗鋳鋼は、５１−Ｍｎ−Ｃｒを基本
成分とし、その化学組成は下記に示すとおりである。The high toughness, wear-resistant cast steel of the present invention has 51-Mn-Cr as a basic component, and its chemical composition is as shown below.
Ｃ：０．２０〜０．５０％ Ｓｉ ：０．５０〜２．００％ Ｍｎ ： ０．５０〜２．００％ Ｏｒ ： １．００〜６．００％、および。C: 0.20-0.50% Si: 0.50-2.00% Mn: 0.50-2.00% Or: 1.00-6.00%, and.
：ｓ：ｏ、ｏｏｏ１〜０．０１係とＴｉ： ０．０１〜
０．１チの中から選んだ１種または２種。:s:o, ooo1~0.01 and Ti: 0.01~
One or two types selected from 0.1chi.
Ｆｅ：残部、および、不可避的な不純物本発明鋳鋼の化
学組成を上述のごとく定めた理由は次のとおりである。Fe: remainder and unavoidable impurities The reason why the chemical composition of the cast steel of the present invention was determined as described above is as follows.
（１）Ｃについて
Ｃは、０．２０％以下では、他の合金元素の添加いかん
にかかわらず、十分な硬さが得られない。(1) Regarding C If C is less than 0.20%, sufficient hardness cannot be obtained regardless of the addition of other alloying elements.
又、０．５０％以上では、衝撃値が低下し、十分々靭性
が得られない。Moreover, if it is 0.50% or more, the impact value decreases and sufficient toughness cannot be obtained.
耐摩粍材料として必要な硬度ＨＲＣ５０以上。Hardness HRC50 or more required as wear-resistant material.
衝撃値１Ｋｇ・ｍ／−以上を得るために２０の範囲を０
．２０〜０．５０チとした。In order to obtain an impact value of 1Kg・m/- or more, the range of 20 is reduced to 0.
．． It was set to 20 to 0.50 inches.
（２） Ｓｉについて Ｓｉは、焼入性とフェライトの硬化に寄与し。(2) About Si Si contributes to hardenability and hardening of ferrite.
低温焼戻し脆性を高温側にずらせる性質を有するが、そ
の含有量が増加するにつれて衝撃値の低下をきたす。It has the property of shifting low-temperature tempering brittleness toward higher temperatures, but as its content increases, the impact value decreases.
このため、その範囲を０．５０〜２．００％とした。Therefore, the range was set to 0.50 to 2.00%.
Ｃ８） Ｍｎについて
Ｍｎは、不純物の除去のため、０．５’０％以上必要で
ある。Ｍｎは、Ｓｉ と同様に焼入性と硬度の向上に寄
与するが、２．００％を越えると衝撃値が低下する。C8) Regarding Mn Mn is required to be 0.5'0% or more in order to remove impurities. Like Si, Mn contributes to improving hardenability and hardness, but if it exceeds 2.00%, the impact value decreases.
このため、その範囲を０．５０〜２．００％とした。Therefore, the range was set to 0.50 to 2.00%.
（４） Ｏｒについて
Ｃｒは、硬さを高める効果が著しいが、１．００係以下
では硬さ、衝撃値ともに不足する。(4) Regarding Or, Cr has a remarkable effect of increasing hardness, but if the coefficient is less than 1.00, both hardness and impact value are insufficient.
又、５．００％を越えると、硬さは高いが、衝撃値が低
下する。If it exceeds 5.00%, the hardness will be high but the impact value will decrease.
このため７その範囲を１．００〜５．００％とした。For this reason, the range of 7 was set at 1.00 to 5.00%.
（５）Ｂについて
Ｂは、ごく少量で焼入性を著しく増大させるとともに、
低温焼戻を行なった場合の粒界を著しく強化して靭性を
向上させる元素で、０．００１％以上で効果をあられし
、０．０１％を越えると、かえって靭性を低下させる。(5) Regarding B B significantly increases hardenability even in a very small amount, and
It is an element that significantly strengthens the grain boundaries and improves toughness when low-temperature tempering is performed. It is effective at 0.001% or more, and when it exceeds 0.01%, it actually reduces toughness.
このため、その範囲を０．００１〜０．０１％とした。Therefore, the range was set to 0.001% to 0.01%.
（（３） Ｔｉについて Ｔｉは、オーステナイトの結晶粒を微細化し。((3) About Ti Ti refines the crystal grains of austenite.
靭性を向上させるとともに、低温焼戻脆性を緩和□する
元素で、ｏ、ｏ１％以上で効果をあられし、０．１チを
越えると、かえって靭性を低下させる。It is an element that improves toughness and alleviates low-temperature temper brittleness. It is effective when O is 1% or more, but when it exceeds 0.1%, it actually reduces toughness.
このため、その範囲を０．０１〜０．１チとした。Therefore, the range was set to 0.01 to 0.1 inches.
以下、実施例により、さらに具体的に本発明鋳鋼を説明
する。Hereinafter, the cast steel of the present invention will be explained in more detail with reference to Examples.
第１表は本発明鋳鋼Ａ、’Ｂ１．Ｃおよび、従来鋳鋼を
、９００℃〜１０００℃の温度に加熱保持した後、急冷
焼入れし、低温焼戻しの熱処理を施して、硬さ試験、衝
撃試験および実機試験を行なった結果を示す表である・
また、第１図は、これら鋳鋼の摩耗試験の結果を示す図
であり、焼戻硬さと摩耗量の関係を示している。Table 1 shows the cast steel A, 'B1. C and a table showing the results of a hardness test, an impact test, and an actual machine test after heating and holding conventional cast steel at a temperature of 900 ° C to 1000 ° C, followed by rapid quenching and low temperature tempering heat treatment. - Fig. 1 is a diagram showing the results of wear tests on these cast steels, and shows the relationship between tempering hardness and amount of wear.
本発明鋳鋼は、ロックウェル硬さくＨＲＯ）５０以上、
シャルピー衝撃値（２ｍＶ）２にり・、ｍ／ａｈ以上の
優れた性能を示し７表中に記した従来鋳鋼に比べて、硬
さ、シャルピー衝撃値ともに高く。The cast steel of the present invention has a Rockwell hardness of HRO) 50 or more,
It exhibits excellent performance with a Charpy impact value (2mV) of 2 m/ah or more, and both hardness and Charpy impact value are higher than the conventional cast steels listed in Table 7.
強靭性に優れていることがわかる。It can be seen that it has excellent toughness.
さらに、第１図に示すように９本発明鋳鋼Ａ。Furthermore, as shown in FIG. 1, nine inventive cast steel A.
Ｂ、Ｏと従来鋳鋼の耐摩耗性を比較すると２本発明鋳鋼
はいずれも優れた耐摩耗性を有することが認められた。Comparing the wear resistance of B, O and conventional cast steel, it was found that both of the two cast steels of the present invention had excellent wear resistance.
このように１本発明においては、硬度、衝撃値ともに高
く高靭性を有する制摩耗鋳鋼を得ることができ、これを
破砕機などのライナに使用した場合、その寿命も著しく
延び、極めて有用である。In this way, according to the present invention, it is possible to obtain anti-wear cast steel having high hardness and impact value and high toughness, and when this is used as a liner for a crusher, etc., its life is significantly extended and it is extremely useful. .
第１図は９本発明鋳鋼と従来鋳鋼における耐摩耗性を比
較するための線図で、焼戻硬さと摩耗量の関係を示す線
図である。FIG. 1 is a diagram for comparing the wear resistance of the cast steel of the present invention and the conventional cast steel, and is a diagram showing the relationship between tempering hardness and amount of wear.
Claims (1)
．００チ。 Ｍｎ ： ０．５０〜２．００％、 Ｏｒ ： １．０
０〜６．００ ％。 および、Ｂ：０．００１〜０．０１％とＴｉ： ０．０
１〜０．１％の中から選んだ１種または２種、残部Ｆｅ
及び不可避的な不純物からなる高靭性耐摩耗鋳鋼。[Claims] C: 0.20 to 0.50, Si: 0.50 to 2
．． 00chi. Mn: 0.50-2.00%, Or: 1.0
0-6.00%. And B: 0.001-0.01% and Ti: 0.0
One or two types selected from 1 to 0.1%, balance Fe
High-toughness wear-resistant cast steel consisting of and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23636783A JPS60128247A (en) | 1983-12-16 | 1983-12-16 | Wear-resistant cast steel having high toughness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23636783A JPS60128247A (en) | 1983-12-16 | 1983-12-16 | Wear-resistant cast steel having high toughness |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24498889A Division JPH02111843A (en) | 1989-09-22 | 1989-09-22 | Cast steel having high toughness and wear resistance for crusher member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60128247A true JPS60128247A (en) | 1985-07-09 |
| JPH0237423B2 JPH0237423B2 (en) | 1990-08-24 |
Family
ID=16999743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23636783A Granted JPS60128247A (en) | 1983-12-16 | 1983-12-16 | Wear-resistant cast steel having high toughness |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60128247A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02179844A (en) * | 1988-12-30 | 1990-07-12 | Aichi Steel Works Ltd | Wear resistant alloy steel |
| US5022933A (en) * | 1988-10-22 | 1991-06-11 | Thyssen Edelstahlwerke Ag | Process for annealing boron-containing steels and product thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5597455A (en) * | 1979-01-18 | 1980-07-24 | Komatsu Ltd | Alloy steel wear resistant to earth and sand |
-
1983
- 1983-12-16 JP JP23636783A patent/JPS60128247A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5597455A (en) * | 1979-01-18 | 1980-07-24 | Komatsu Ltd | Alloy steel wear resistant to earth and sand |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5022933A (en) * | 1988-10-22 | 1991-06-11 | Thyssen Edelstahlwerke Ag | Process for annealing boron-containing steels and product thereof |
| JPH02179844A (en) * | 1988-12-30 | 1990-07-12 | Aichi Steel Works Ltd | Wear resistant alloy steel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0237423B2 (en) | 1990-08-24 |
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