JP3115563B2 - Manufacturing method of wear-resistant cast steel - Google Patents
Manufacturing method of wear-resistant cast steelInfo
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- JP3115563B2 JP3115563B2 JP11131618A JP13161899A JP3115563B2 JP 3115563 B2 JP3115563 B2 JP 3115563B2 JP 11131618 A JP11131618 A JP 11131618A JP 13161899 A JP13161899 A JP 13161899A JP 3115563 B2 JP3115563 B2 JP 3115563B2
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- temperature
- casting
- wear
- cast steel
- resistant cast
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Description
【０００１】[0001]
【発明の属する技術分野】本発明は、耐摩耗鋳鋼の製造
方法に関し、特に、セメントや窯業等で使用されるグラ
インディングミルの裏板や中仕切目板等に用いられる耐
摩耗鋳鋼の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a wear-resistant cast steel, and more particularly, to a method for producing a wear-resistant cast steel used for a backing plate, a middle partition plate, etc. of a grinding mill used in cement, ceramics and the like. About.
【０００２】[0002]
【従来の技術】従来、この種の耐摩耗鋳鋼の製造方法と
しては、Ｃ（炭素）０．２０〜０．３５wt％、Ｓｉ（シ
リコン）１．３０〜２．８０wt％、Ｍｎ（マンガン）
０．５０〜１．５０wt％、Ｃｒ（クロム）３．００〜
４．５０wt％、Ｍｏ（モリブデン）０．１０〜０．５０
wt％、及び残部がＦｅ（鉄）からなる鋳造物を９５０〜
１０８０℃の温度に加熱後急冷し、その後低温焼戻しし
たり（特公昭５４−４２８１１号公報参照）、Ｃ０．２
０〜０．３５wt％、Ｓｉ１．３０〜２．８０wt％、Ｍｎ
０．５０〜１．５０wt％、Ｃｒ３．００〜４．５０wt
％、Ｍｏ０．１０〜０．５０wt％、Ｔｉ（チタン）、Ｚ
ｒ（ジルコニウム）、Ｖ（バナジウム）、ボロン（Ｂ）
及びＣｂ（コロンビウム）の１種以上０．０３〜０．１
０wt％、及び残部がＦｅからなる鋳造物を９５０〜１０
８０℃の温度に加熱後急冷し、その後５００〜６５０℃
の温度で焼戻ししたり（特公昭５６−４３１０２号公報
参照）、あるいはＣ０．２〜０．５wt％、Ｓｉ１．２〜
２．５wt％、Ｍｎ０．４〜１．２wt％、Ｃｒ２．５〜
４．５wt％、Ｍｏ０．１〜０．５wt％、Ｎｉ（ニッケ
ル）０．５〜２．０wt％、Ｔｉ、Ｚｒ、Ｖ及びＮｂ（ニ
オブ）の１種以上、０．０３〜０．１０wt％、及び残部
が実質的にＦｅからなる鋳造物を９５０〜１１００℃の
温度に加熱後急冷し、その後低温焼戻しする（特開昭６
４−７９３５０号公報参照）方法が知られている。な
お、鋳造物を９５０〜１１００℃の温度に加熱後に急冷
する焼入れは、通常、油焼入れによって行われるもので
あり、又、低温焼戻しは、通常、２５０〜３００℃の温
度で、かつ、高温焼戻しは、通常、５００〜６５０℃の
温度で行われるものである。2. Description of the Related Art Conventionally, as a method for producing this type of wear-resistant cast steel, 0.20 to 0.35% by weight of C (carbon), 1.30 to 2.80% by weight of Si (silicon), and Mn (manganese)
0.50 to 1.50 wt%, Cr (chromium) 3.00 to
4.50 wt%, Mo (molybdenum) 0.10 to 0.50
wt% and the balance of Fe (iron)
After heating to a temperature of 1080 ° C., it is quenched and then tempered at a low temperature (see Japanese Patent Publication No. 54-42811).
0 to 0.35 wt%, Si 1.30 to 2.80 wt%, Mn
0.50 to 1.50 wt%, Cr 3.00 to 4.50 wt%
%, Mo 0.10 to 0.50 wt%, Ti (titanium), Z
r (zirconium), V (vanadium), boron (B)
And at least one of Cb (Columbium) 0.03 to 0.1
0 wt% and the balance of Fe is 950-10
After heating to a temperature of 80 ° C., quenching, then 500-650 ° C.
Tempering (see Japanese Patent Publication No. 56-43102), or C0.2-0.5 wt%, Si1.2-
2.5wt%, Mn0.4 ~ 1.2wt%, Cr2.5 ~
4.5 wt%, Mo 0.1 to 0.5 wt%, Ni (nickel) 0.5 to 2.0 wt%, at least one of Ti, Zr, V and Nb (niobium), 0.03 to 0.10 wt% And a balance substantially consisting of Fe, heated to a temperature of 950 to 1100 ° C., rapidly cooled, and then tempered at a low temperature.
A method is known. The quenching, in which the casting is rapidly cooled after being heated to a temperature of 950 to 1100 ° C., is usually performed by oil quenching, and the low-temperature tempering is usually performed at a temperature of 250 to 300 ° C. and at a high temperature. Is usually performed at a temperature of 500 to 650 ° C.
【０００３】[0003]
【発明が解決しようとする課題】しかし、従来の耐摩耗
鋳鋼の製造方法のいずれも、Ｃｒの含有量が２．５〜
４．５wt％と多く、かつ、９５０〜１１００℃の温度に
加熱後急冷焼入れしているので、焼入れ過程で割れが生
じる不具合がある。又、鋳造物の型ばらしは、小形の鋳
物で早い場合、鋳造後２時間程度経過してから行なわ
れ、この時点での鋳造物の温度は、６００℃を超え１０
００℃以下であり、その温度から空気中で冷却されるた
め、組織が不均一となると共に、冷却過程で硬くなり、
割れが生じることがある。このことは、合金量が多い鋳
造物の場合、一層顕著となる。そこで、本発明は、割れ
の発生を防止し得る耐摩耗鋳鋼の製造方法を提供するこ
とを目的とする。However, in any of the conventional methods for producing wear-resistant cast steel, the content of Cr is 2.5 to 2.5%.
Since it is rapidly quenched after heating to a temperature of 950 to 1100 ° C. as large as 4.5 wt%, there is a problem that cracks occur during the quenching process. In addition, if the casting is to be released with a small casting, it is performed about 2 hours after the casting, and the temperature of the casting at this point exceeds 600 ° C.
Since it is below 00 ° C and cooled in air from that temperature, the tissue becomes non-uniform and hardens during the cooling process,
Cracks may occur. This becomes more remarkable in the case of a casting having a large amount of alloy. Therefore, an object of the present invention is to provide a method for producing a wear-resistant cast steel capable of preventing occurrence of cracks.
【０００４】[0004]
【課題を解決するための手段】前記課題を解決するた
め、本発明の第１の耐摩耗鋳鋼の製造方法は、Ｃ０．３
〜０．５wt％、Ｓｉ０．５〜１．５wt％、Ｍｎ０．５〜
１．５wt％、Ｃｒ３．０〜５．０wt％、Ｍｏ０．０５〜
０．５wt％、及び残部がＦｅと不可避不純物からなる鋳
造物を９００〜１０５０℃の温度に加熱後衝風冷却し、
３００〜４００℃の温度で焼戻しすることを特徴とす
る。前記衝風冷却は、鋳造物の温度が１００〜３００℃
になるまで行うことが好ましい。又、第２の耐摩耗鋳鋼
の製造方法は、第１の方法において、前記鋳造物の型ば
らしを鋳造物の温度が２００〜６００℃になった時点で
行うことを特徴とする。In order to solve the above-mentioned problems, a first method for producing a wear-resistant cast steel according to the present invention comprises the steps of:
~ 0.5wt%, Si0.5 ~ 1.5wt%, Mn0.5 ~
1.5 wt%, Cr 3.0-5.0 wt%, Mo0.05-
0.5 wt%, and the balance consisting of Fe and inevitable impurities is heated to a temperature of 900 to 1050 ° C. and then cooled by blast,
It is characterized by tempering at a temperature of 300 to 400C. The blast cooling is performed when the temperature of the casting is 100 to 300 ° C.
It is preferable to perform until it becomes. Further, a second method for producing a wear-resistant cast steel is characterized in that, in the first method, the casting is separated when the temperature of the casting reaches 200 to 600 ° C.
【０００５】鋳造物は、Ｃ０．３５〜０．４５wt％、Ｓ
ｉ０．８〜１．５wt％、Ｍｎ０．６〜１．２wt％、Ｃｒ
３．５〜４．５wt％、Ｍｏ０．１５〜０．４０wt％、及
び残部がＦｅと不可避不純物からなることが好ましく、
より好ましくはＣ０．３８〜０．４３wt％、Ｓｉ１．０
〜１．４wt％、Ｍｎ０．７〜１．０wt％、Ｃｒ３．８〜
４．３wt％、Ｍｏ０．２８〜０．３３wt％、及び残部が
Ｆｅと不可避不純物からなることである。[0005] The cast material has a C content of 0.35 to 0.45 wt%,
i0.8-1.5wt%, Mn0.6-1.2wt%, Cr
It is preferable that 3.5 to 4.5 wt%, Mo is 0.15 to 0.40 wt%, and the balance is Fe and inevitable impurities.
More preferably, C 0.38 to 0.43 wt%, Si 1.0
~ 1.4wt%, Mn0.7 ~ 1.0wt%, Cr3.8 ~
4.3 wt%, Mo 0.28 to 0.33 wt%, and the balance consists of Fe and inevitable impurities.
【０００６】Ｃは、鋳鋼の硬さ（耐摩耗性）を確保する
ためのものであり、その含有量が、０．３wt％未満であ
ると、所望の硬さが得られない、一方、０．５wt％を超
えると、所望の衝撃値（靱性）が得られない。Ｃの含有
量は、０．３５〜０．４５wt％が好ましく、より好まし
くは０．３８〜０．４３wt％である。C is for ensuring the hardness (wear resistance) of the cast steel. If the content is less than 0.3% by weight, the desired hardness cannot be obtained. If it exceeds 0.5 wt%, a desired impact value (toughness) cannot be obtained. The content of C is preferably 0.35 to 0.45 wt%, more preferably 0.38 to 0.43 wt%.
【０００７】Ｓｉは、Ｃｒ、Ｍｏと共に低温焼戻し脆性
を高温側へ移行させる性質を有するものであり、その含
有量が、０．５wt％未満であると、強度が低下し、一
方、１．５wt％を超えると、衝撃値、硬度が低下する。
Ｓｉの含有量は、０．８〜１．５wt％が好ましく、より
好ましくは１．０〜１．４wt％である。[0007] Si has the property of shifting the low-temperature temper brittleness to the high-temperature side together with Cr and Mo. If the content is less than 0.5 wt%, the strength is reduced, while 1.5 wt%. %, The impact value and hardness decrease.
The content of Si is preferably 0.8 to 1.5 wt%, more preferably 1.0 to 1.4 wt%.
【０００８】Ｍｎは、脱酸脱硫に寄与するものであり、
その含有量が、０．５wt％未満であると、脱酸脱硫効果
が得られない、一方、１．５wt％を超えると、衝撃値が
低下する。Ｍｎの含有量は、０．６〜１．２wt％が好ま
しく、より好ましくは０．７〜１．０wt％である。[0008] Mn contributes to deoxidation and desulfurization,
If the content is less than 0.5 wt%, the deoxidizing and desulfurizing effect cannot be obtained, while if it exceeds 1.5 wt%, the impact value decreases. The content of Mn is preferably from 0.6 to 1.2 wt%, more preferably from 0.7 to 1.0 wt%.
【０００９】Ｃｒは、低温焼戻し脆性を高温側へ移行さ
せる性質を有するものであり、その含有量が、３．０wt
％未満であると、焼入れ性が低下し、一方、５．０wt％
を超えると、耐摩性は向上するが靱性が低下する。Ｃｒ
の含有量は、３．５〜４．５wt％が好ましく、より好ま
しくは３．８〜４．３wt％である。[0009] Cr has the property of shifting the low-temperature temper brittleness to the high-temperature side, and its content is 3.0 wt%.
%, The hardenability decreases, while 5.0 wt%
If it exceeds, the abrasion resistance is improved, but the toughness is reduced. Cr
Is preferably 3.5 to 4.5% by weight, more preferably 3.8 to 4.3% by weight.
【００１０】Ｍｏは、焼入性を高め、強度を増す性質を
有するものであり、その含有量が０．０５wt％未満であ
ると、高温焼入れ後の焼戻し軟化抵抗を増す効果が得ら
れない、一方、０．５wt％を超えると、上記効果が一定
となり、経済的メリットがない。Ｍｏの含有量は、０．
１５〜０．４０wt％が好ましく、より好ましくは０．２
８〜０．３３wt％である。Mo has the property of increasing the hardenability and increasing the strength, and if its content is less than 0.05 wt%, the effect of increasing the tempering softening resistance after high-temperature quenching cannot be obtained. On the other hand, when the content exceeds 0.5% by weight, the above-mentioned effect becomes constant and there is no economic merit. The content of Mo is 0.1.
It is preferably from 15 to 0.40% by weight, more preferably from 0.2 to 0.40% by weight.
8 to 0.33 wt%.
【００１１】衝風冷却は、鋳造物の温度が１００℃未満
になるまで行うと、焼入れ効果が定常状態となってメリ
ットが無く、かつ、生産性が低下する、一方、鋳造物の
温度が３００℃を超えるまででは、復熱によって焼入れ
効果が低減する。衝風冷却は、鋳造物の温度が１２０〜
２５０℃になるまで行うことが好ましく、より好ましく
は鋳造物の温度が１５０〜２００℃になるまで行うこと
である。If the impingement cooling is performed until the temperature of the casting becomes less than 100 ° C., the quenching effect becomes a steady state and there is no merit, and the productivity is reduced. Until the temperature exceeds ℃, the quenching effect is reduced by reheating. The impingement cooling has a casting temperature of 120-
It is preferably carried out until the temperature reaches 250 ° C., more preferably until the temperature of the casting reaches 150 to 200 ° C.
【００１２】鋳造物の型ばらしを鋳造物の温度が２００
〜６００℃になった時点で行うことによって、焼入れが
抑制される。鋳造物の型ばらしは、鋳造物の温度が２０
０℃未満になった時点で行うと、焼入れ抑制効果が定常
状態となってメリットが無く、かつ、生産性が低下す
る、一方、鋳造物の温度が６００℃を超えた時点で行う
と、その後の急冷により焼きが入り、割れが生じ易くな
る。鋳造物の型ばらしは、鋳造物の温度が２００〜５０
０℃になった時点で行うことが好ましく、より好ましく
は鋳造物の温度が２００〜３００℃になった時点で行う
ことである。When the temperature of the casting is 200
The quenching is suppressed by performing the process when the temperature reaches ~ 600 ° C. When the casting is released, the temperature of the casting is 20
If performed at a time point of less than 0 ° C., the quenching suppression effect will be in a steady state and there is no merit, and productivity will be reduced. On the other hand, if performed at a time point when the temperature of the casting exceeds 600 ° C., then Is quenched due to rapid cooling, and cracks easily occur. When the casting is released, the temperature of the casting is 200 to 50.
It is preferably performed when the temperature reaches 0 ° C, more preferably when the temperature of the casting reaches 200 to 300 ° C.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施の形態につい
て具体例を参照して説明する。先ず、Ｃ、Ｓｉ、Ｍｎ、
Ｃｒ、Ｍｏの各元素を表１に示す割合で含有し（表１に
おいては、鋳造物の割れに特に影響を与えるＣとＣｒの
含有割合を変え、Ｓｉ、Ｍｎ、Ｍｏの含有割合をそれぞ
れの範囲内の適宜の値とした。）、かつ、残部がＦｅと
不可避不純物からなる各種のテストピース（Ｎｏ．１〜
Ｎｏ．９）となる鋳造物をそれぞれ所要の温度で鋳込ん
だ後、鋳造物を表２に示す各温度になった時点で型ばら
しを行ったところ、各鋳造物の割れの有無は、表２に示
すようになった。Embodiments of the present invention will be described below with reference to specific examples. First, C, Si, Mn,
Each element of Cr and Mo is contained in the proportions shown in Table 1 (in Table 1, the contents of C and Cr, which particularly affect the cracks of the casting, are changed, and the contents of Si, Mn, and Mo are respectively changed. Various test pieces (No. 1 to No. 1) with the balance being Fe and unavoidable impurities were used.
No. After casting the castings at 9), the castings were separated at the respective temperatures shown in Table 2. When the castings were separated, the presence or absence of cracks in each casting was determined in Table 2. It began to show.
【００１４】[0014]
【表１】 [Table 1]
【００１５】[0015]
【表２】 [Table 2]
【００１６】表１、表２から、Ｃ０．２５wt％以下、Ｃ
ｒ２．５０wt％以下を含有する鋳造物は、型ばらしを鋳
造物の温度が１０００℃以上で行っても割れを生じない
が、Ｃ０．３０wt％、Ｃｒ３．００wt％をそれぞれ超え
て含有する鋳造物は、型ばらしを鋳造物の温度が６００
℃以下になった時点で行わないと割れを生じ、特にＣ
０．５０wt％、Ｃｒ５．００wt％をそれぞれ超えて含有
する鋳造物は、型ばらしを鋳造物の温度が５５０℃未満
になった時点で行わないと割れを生じることが分かる。From Tables 1 and 2, it is found that C is not more than 0.25 wt%,
Castings containing 2.50 wt% or less of r do not crack even if the casting is separated at a temperature of 1000 ° C. or more, but casts containing more than 0.30 wt% of C and 3.00 wt% of Cr, respectively. When the temperature of the casting is 600
If it is not performed at the time when the temperature becomes lower than or equal to
It can be seen that a casting containing more than 0.50 wt% and Cr 5.00 wt%, respectively, will crack if the mold is not separated when the temperature of the casting becomes lower than 550 ° C.
【００１７】次に、２２０℃の温度で型ばらしを行った
各鋳造物を、９００〜１０５０℃の温度に加熱後、それ
ぞれの鋳造物の温度が表３に示す温度になるまで衝風冷
却する焼準処理を施したところ、割れの有無及び硬度
は、表３に示すようになった。Next, each of the castings that had been separated at a temperature of 220 ° C. was heated to a temperature of 900 to 1050 ° C., and then subjected to blast cooling until the temperature of each casting reached the temperature shown in Table 3. As a result of normalizing, the presence / absence of cracks and the hardness were as shown in Table 3.
【００１８】[0018]
【表３】 [Table 3]
【００１９】表３から、Ｃ０．３〜０．５wt％、Ｃｒ
３．０〜５．０wt％含有するものは、衝風冷却を１００
〜３００℃の温度になるまで行うことにより割れが生ぜ
ず、かつ、硬度がＨＲＣ５３〜５７．５となることが分
かる。From Table 3, it can be seen that C 0.3-0.5 wt%, Cr
Those containing 3.0 to 5.0 wt% have 100% blast cooling.
It can be seen that cracking does not occur and the hardness becomes HRC 53 to 57.5 by performing the process until the temperature reaches to 300 ° C.
【００２０】次いで、各鋳造物（衝風冷却後の温度１０
０℃のものを除く）に、３００〜４００℃の温度（具体
的には３５０℃）で焼戻し処理を施したところ、硬度及
び衝撃値は、表４に示すようになった。Next, each of the castings (at a temperature of 10
When tempering was performed at a temperature of 300 to 400 ° C. (specifically, 350 ° C.), hardness and impact values were as shown in Table 4.
【００２１】[0021]
【表４】 [Table 4]
【００２２】表４から、Ｃ０．３〜０．５wt％、Ｓｉ
０．５〜１．５wt％、Ｍｎ０．５〜１．５wt％、Ｃｒ
３．０〜５．０wt％、Ｍｏ０．０５〜０．５wt％、及び
残部がＦｅと不可避不純物からなる鋳造物を所要温度で
鋳込んだ後、鋳造物の温度が２００〜６００℃になった
時点で型ばらしを行い、鋳造物を９００〜１０５０℃の
温度に加熱後鋳造物の温度が１００〜３００℃になるま
で衝風冷却し、しかる後に３００〜４００℃の温度で焼
戻しすることにより、型ばらし後の鋳造物の割れ及び焼
準処理後の鋳造物の割れを生じることなく、硬さ５２．
０〜５６．０ＨＲＣ、衝撃値１５〜５０Ｊ／cm2 の耐摩
耗鋳鋼（製品）が得られることが分かる。From Table 4, it can be seen that C 0.3-0.5 wt%, Si
0.5-1.5wt%, Mn0.5-1.5wt%, Cr
After casting at a required temperature a casting composed of 3.0 to 5.0 wt%, Mo 0.05 to 0.5 wt%, and the balance being Fe and unavoidable impurities, the temperature of the casting reached 200 to 600 ° C. At the time, the mold is separated, the casting is heated to a temperature of 900 to 1050 ° C., and then cooled by blast until the temperature of the casting reaches 100 to 300 ° C., and then tempered at a temperature of 300 to 400 ° C., Hardness without cracking of the casting after mold release and cracking of the casting after normalizing treatment.
It can be seen that a wear-resistant cast steel (product) having 0 to 56.0 HRC and an impact value of 15 to 50 J / cm 2 can be obtained.
【００２３】[0023]
【発明の効果】以上説明したように、本発明の第１の耐
摩耗鋳鋼の製造方法によれば、鋳造物の焼準処理時にお
ける焼入れ効果が発揮されるので、焼準処理時の割れの
発生を防止し、かつ、高い硬度を得ることができる。
又、第２の耐摩耗鋳鋼の製造方法によれば、第１の方法
によって得られる作用効果の他、鋳造物の型ばらし後の
焼入れが抑制されるので、鋳造物の型ばらし後の割れの
発生を防止できる。As described above, according to the first method for producing a wear-resistant cast steel of the present invention, a quenching effect is exerted at the time of normalizing the cast product, so that cracks at the time of normalizing are reduced. Generation can be prevented and high hardness can be obtained.
Further, according to the second method for producing a wear-resistant cast steel, in addition to the effects obtained by the first method, quenching after the casting is separated from the mold is suppressed. Occurrence can be prevented.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特公 昭54−42811（ＪＰ，Ｂ２) 特公 昭54−22769（ＪＰ，Ｂ２) 特公 昭56−43102（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) C22C 38/00 - 38/60 C21D 6/00 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-B-54-42811 (JP, B2) JP-B 54-22769 (JP, B2) JP-B 56-43102 (JP, B2) (58) Field (Int. Cl. 7 , DB name) C22C 38/00-38/60 C21D 6/00
Claims (3)
１．５wt％、Ｍｎ０．５〜１．５wt％、Ｃｒ３．０〜
５．０wt％、Ｍｏ０．０５〜０．５wt％、及び残部がＦ
ｅと不可避不純物からなる鋳造物を９００〜１０５０℃
の温度に加熱後衝風冷却し、３００〜４００℃の温度で
焼戻しすることを特徴とする耐摩耗鋳鋼の製造方法。1. C. 0.3-0.5 wt%, Si 0.5-
1.5 wt%, Mn 0.5-1.5 wt%, Cr 3.0-
5.0 wt%, Mo 0.05-0.5 wt%, and the balance F
900 to 1050 ° C for castings consisting of e and unavoidable impurities
A method for producing a wear-resistant cast steel, comprising heating to a temperature of 0.15 g, cooling by impingement, and tempering at a temperature of 300 to 400 ° C.
３００℃になるまで行うことを特徴とする請求項１記載
の耐摩耗鋳鋼の製造方法。2. The method according to claim 1, wherein the blast cooling is performed when the temperature of the casting is 100 to 100.
The method for producing a wear-resistant cast steel according to claim 1, wherein the method is performed until the temperature reaches 300 ° C.
２００〜６００℃になった時点で行うことを特徴とする
請求項１又は２記載の耐摩耗鋳鋼の製造方法。3. The method for producing a wear-resistant cast steel according to claim 1, wherein the casting is unmolded when the temperature of the casting becomes 200 to 600 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11131618A JP3115563B2 (en) | 1999-05-12 | 1999-05-12 | Manufacturing method of wear-resistant cast steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11131618A JP3115563B2 (en) | 1999-05-12 | 1999-05-12 | Manufacturing method of wear-resistant cast steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
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| JP3115563B2 true JP3115563B2 (en) | 2000-12-11 |
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|---|---|---|---|
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| CN104328346A (en) * | 2014-11-08 | 2015-02-04 | 江苏天舜金属材料集团有限公司 | Processing process of wear-resisting anti-impact type pile foundation steel protective barrel |
| WO2016170866A1 (en) * | 2015-04-21 | 2016-10-27 | 株式会社小松製作所 | Steel for chisels and chisel |
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