JPH0527698B2 - - Google Patents
Info
- Publication number
- JPH0527698B2 JPH0527698B2 JP1132964A JP13296489A JPH0527698B2 JP H0527698 B2 JPH0527698 B2 JP H0527698B2 JP 1132964 A JP1132964 A JP 1132964A JP 13296489 A JP13296489 A JP 13296489A JP H0527698 B2 JPH0527698 B2 JP H0527698B2
- Authority
- JP
- Japan
- Prior art keywords
- wear resistance
- elongation
- manganese
- mechanical strength
- tensile strength
- 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.)
- Expired - Fee Related
Links
- 229910052782 aluminium Inorganic materials 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- FHTCLMVMBMJAEE-UHFFFAOYSA-N bis($l^{2}-silanylidene)manganese Chemical compound [Si]=[Mn]=[Si] FHTCLMVMBMJAEE-UHFFFAOYSA-N 0.000 claims description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 229910000906 Bronze Inorganic materials 0.000 claims description 7
- 239000010974 bronze Substances 0.000 claims description 7
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 239000011572 manganese Substances 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 238000005496 tempering Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000943 NiAl Inorganic materials 0.000 description 1
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007528 sand casting Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Landscapes
- Sliding-Contact Bearings (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Description
産業上の利用分野
本発明は耐摩耗性に優れ、且つ機械的強度が要
求される摺動部材などに有効なアルミニウム青銅
に関するものである。
従来の技術
従来、摺動部材の形成に用いる銅合金の中で耐
摩耗性及び強度のあるものとしては、一般にJIS
に規定されているアルミニウム青銅、高力黄銅等
が使用されている。
ところが最近、摺動部材等の使用条件が苛酷と
なり、従来のものより耐摩耗性に優れ、且つ機械
的強度を低下させないものが要求されている。
例えば、基礎等の補修を行うため大型の石油タ
ンクを上昇させるジヤツキ装置及び高荷重のウオ
ーム減速機のごとく、苛酷な耐摩耗性と機械的強
度を要求されるものが存在する。これらのものに
おいては、機械的強度として、引張強さ65Kgｆ／
mm2以上、伸び15％以上、硬度HB180（10/3000）
以上を満足するものであつて、しかも高い耐摩耗
性を有するものでなければならない。
従来、耐摩耗性を向上させるために、マンガン
珪化物を分散させたものが、特開昭55−16749号
および特開昭52−138014号公報記載の発明として
知られている。しかし、これらの発明は機械的強
度が低く、上述の様な苛酷な条件でのジヤツキ装
置、ウオーム減速機等には使用出来なかつた。
また、従来は、苛酷な条件で使用できるもので
あつて、耐摩耗性に優れ且つ機械的強度として、
引張強さ65Kgｆ／mm2以上、伸び15％以上、硬度
HB180（10/3000）以上を満足するものは開発さ
れていない。
発明が解決しようとする課題
本発明は上述のごとき課題を解決しようとする
ものであつて、耐摩耗性を向上させるために、基
地中にマンガン珪化物を分散させ、同時に機械的
強度が、引張強さ65Kgｆ／mm2以上、伸び15％以
上、硬度HB180（10/3000）以上を満足させよう
とするものである。
課題を解決するための手段
本発明は上述のごとき課題を解決するため、重
量比でアルミニウム8.5〜10.5％、鉄2.0〜5.0％、
マンガン0.5〜2.0％、ニツケル0.5〜5.0％、シリ
コン0.5〜1.5および残部銅からなり、基地中にマ
ンガン珪化物を分散させ、700〜850℃焼入、570
〜700℃焼戻の熱処理を行い、機械的強度が、引
張強さ65Kgｆ／mm2以上、伸び15％以上、硬度
HB180（10/3000）以上を満足させるものである
事を特徴とするものである。
本発明者等は、耐摩耗性を向上させるために、
基地中にマンガン珪化物を分散させ、同時に機械
的強度も引張強さ65Kgｆ／mm2以上、伸び15％以
上、硬度HB180（10/3000）以上を満足させるた
めの研究を行つた。その結果、アルミニウム青銅
に適正なマンガン珪化物を分散させ、熱処理を行
うことが有効であるという知見を得て、上記の本
発明を完成したものである。
本発明に於いて、アルミニウムは機械的特性に
最も影響を及ぼす成分である。アルミニウム量の
増加とともに引張り強さは増大するが、伸びは減
少する。そのため、アルミニウム量が8.5wt％以
下だと引張強さは、65Kgｆ／mm2以下となり、
10.5wt％以上だと伸びは15％以下になる。そのた
めアルミニウム量は8.5〜10.5wt％でなければ成
らない。
また、鉄は、組織を微細にして強度を上昇させ
る効果があるが、鉄量が2.0wt％以下だと微細化
の効果がなく、5.0wt％以上だと伸びは低下する。
そのため、鉄量は2.0〜5.0wt％でなければ成らな
い。
また、マンガンは、素地を強化する他シリコン
と化合し、耐摩耗性向上に有効なマンガン珪化物
をつくる効果があるが、その含有量が0.5wt％以
下ではその効果が得られず、また2.0wt％以上含
有させると耐摩耗性向上の効果はあるが、伸びが
低下する。そのためマンガン量は0.5〜2.0wt％で
なければ成らない。
また、ニツケルは、素地に固溶し、素地を強化
させる効果があるが、その含有量が0.5wt％以下
ではその効果がなく、5.0wt％以上だと、相
（NiAl）が層状となり伸びが低下する。そのため
ニツケル量は0.5〜5.0wt％でなければ成らない。
また、シリコンは、マンガンと化合し、耐摩耗
性向上に有効なマンガン珪化物をつくる効果があ
るが、シリコンが0.5wt％以下ではマンガン珪化
物の分散相が少なく、耐摩耗性の向上に寄与しな
いが、1.5wt％以上だと耐摩耗性は維持するが、
機械的強度が低下する。このためシリコンは0.5
〜1.5wt％でなければならない。
また、従来のアルミニウム青銅より、耐摩耗性
が優れ、且つ機械的強度も引張強さ65Kgｆ／mm2以
上、伸び15％以上、硬度HB180（10/3000）以上
のものを得るためには、適正な熱処理を行うこと
が必要である。その熱処理条件は、研究の結果、
700〜850℃焼入、570〜700℃焼戻が適正であるこ
とがわかつた。
実施例
以下本発明の実施例を説明する。
表１に示す成分基地をもつ本発明合金及び比較
合金の供試材は、通常の高周波誘導炉を用いた。
そして、黒鉛るつぼ中で大気溶解後、この溶湯の
半分を金型圧力鋳造にて80mmφ×200mmＬの鋳塊
を得た。また、残りの溶湯を砂型に鋳込み
JISH5114に規定されたＦ号供試材を得た。
次に、この供試材から摩耗試験片５×５×20mm
及び引張試験用JIS4号試験片を切り出した。各試
験片は表１に記載の通り、700〜850℃×1Hで焼
入、570〜700℃×1Hで焼戻の熱処理を行つた。
摩耗試験の条件
試験装置：葉山式摩耗試験機
相手剤：SUS410
乾式 周速15ｍ／分
湿式 周速30ｍ／分
潤滑条件：滴下にて潤滑油（No.46）を約30c.c.／Ｈ
供給
また、表１でNo.１〜９は本発明合金、No.10〜16
は比較合金の実施例である。また鋳造法のＰは、
圧力鋳造を示し、Ｓは砂型鋳造を示している。
比較合金のNo.10は、耐摩性は良好であるが、シ
リコン含有量が多いため引つ張り強さが低下し、
又Al含有量が少ないにもかかわらず伸びが低下
している。
また、No.14は、マンガン含有量が高い比較例で
あり、耐摩耗性も悪く伸びも低い。
また、No.16は、通常のアルミニウム青銅であ
り、機械的性質は良好だが耐摩耗性は劣る。
また、No.15は、本発明のNo.８の熱処理条件を本
発明の範囲外に変えたもので、伸びが不足してい
る。
また、No.11、12、13は本発明で限定したアルミ
ニウムの含有量8.5〜10.5％に対し、いずれも8.5
％以下であり、これらの耐摩性は良好であるが、
引張強さ及び硬度はいずれも低いので要求を満足
しない。
発明の効果
以上の通り、本発明は耐摩耗性に優れ且つ機械
的強度も、引つ張り強さ65Kgｆ／mm2以上、伸び15
％以上、硬度HB180（10/3000）以上を満足する
ものである。そのため、従来の耐摩耗性アルミニ
ウム青銅に比較し、耐摩耗性が優れており、且つ
その耐摩耗性を低下させることがなく、機械的強
度も高いものである。
従つて、苛酷な条件で使用する摺動部材などに
利用する場合、下きな利点を有するものである。
INDUSTRIAL APPLICATION FIELD The present invention relates to aluminum bronze which has excellent wear resistance and is effective for sliding members etc. which require mechanical strength. Conventional technology Conventionally, among the copper alloys used for forming sliding members, those with wear resistance and strength are generally JIS
Aluminum bronze, high-strength brass, etc. specified in However, recently, the usage conditions for sliding members and the like have become more severe, and there is a demand for materials that have better wear resistance than conventional materials and do not reduce their mechanical strength. For example, there are things that require severe abrasion resistance and mechanical strength, such as jacking devices that raise large oil tanks for repairing foundations, etc., and heavy-duty worm reducers. In these products, the mechanical strength is tensile strength of 65Kgf/
mm 2 or more, elongation 15% or more, hardness HB180 (10/3000)
It must satisfy the above requirements and also have high wear resistance. Conventionally, in order to improve wear resistance, a method in which manganese silicide is dispersed has been known as the invention described in JP-A-55-16749 and JP-A-52-138014. However, these inventions have low mechanical strength and cannot be used in jacking devices, worm reducers, etc. under the above-mentioned severe conditions. In addition, conventional products can be used under harsh conditions and have excellent wear resistance and mechanical strength.
Tensile strength 65Kgf/ mm2 or more, elongation 15% or more, hardness
Nothing has been developed that satisfies HB180 (10/3000) or higher. Problems to be Solved by the Invention The present invention attempts to solve the above-mentioned problems, and in order to improve wear resistance, manganese silicide is dispersed in the base, and at the same time mechanical strength and tensile strength are improved. It is intended to satisfy the following requirements: strength of 65 kgf/mm 2 or more, elongation of 15% or more, and hardness of HB180 (10/3000) or more. Means for Solving the Problems In order to solve the above-mentioned problems, the present invention has a weight ratio of 8.5 to 10.5% aluminum, 2.0 to 5.0% iron,
Consists of 0.5~2.0% manganese, 0.5~5.0% nickel, 0.5~1.5% silicon, and the balance copper, with manganese silicide dispersed in the base, quenched at 700~850℃, 570℃
~700℃ tempering heat treatment, mechanical strength: tensile strength 65Kgf/mm2 or more, elongation 15% or more, hardness
It is characterized by satisfying HB180 (10/3000) or higher. In order to improve wear resistance, the present inventors
Research was conducted to disperse manganese silicide in the matrix and at the same time satisfy mechanical strengths of tensile strength of 65 Kgf/mm 2 or more, elongation of 15% or more, and hardness of HB180 (10/3000) or more. As a result, the present invention was completed based on the knowledge that it is effective to disperse appropriate manganese silicide in aluminum bronze and heat treat it. In the present invention, aluminum is the component that most affects mechanical properties. As the amount of aluminum increases, the tensile strength increases, but the elongation decreases. Therefore, if the aluminum content is less than 8.5wt%, the tensile strength will be less than 65Kgf/ mm2 ,
If it is more than 10.5wt%, the growth will be less than 15%. Therefore, the amount of aluminum must be 8.5 to 10.5 wt%. Further, iron has the effect of making the structure finer and increasing strength, but if the iron content is less than 2.0wt%, there is no refinement effect, and if it is more than 5.0wt%, elongation decreases.
Therefore, the iron content must be 2.0 to 5.0 wt%. In addition, manganese has the effect of strengthening the substrate and combining with silicon to create manganese silicide, which is effective in improving wear resistance, but this effect cannot be obtained if the content is less than 0.5 wt%, and if the content is less than 0.5 wt%, When it is contained in wt% or more, it has the effect of improving wear resistance, but elongation decreases. Therefore, the amount of manganese must be 0.5 to 2.0 wt%. In addition, nickel is dissolved in the base material and has the effect of strengthening the base material, but if the content is less than 0.5wt%, it has no effect, and if it is more than 5.0wt%, the phase (NiAl) becomes layered and elongation is reduced. descend. Therefore, the amount of nickel must be 0.5 to 5.0 wt%. In addition, silicon has the effect of combining with manganese and creating manganese silicide, which is effective in improving wear resistance, but when silicon is less than 0.5 wt%, there is little dispersed phase of manganese silicide, which contributes to improving wear resistance. However, if it is 1.5wt% or more, wear resistance will be maintained, but
Mechanical strength decreases. Therefore silicon is 0.5
Must be ~1.5wt%. In addition, in order to have better wear resistance than conventional aluminum bronze, as well as mechanical strength of tensile strength of 65 kgf/mm 2 or more, elongation of 15% or more, and hardness of HB180 (10/3000) or more, it is necessary to It is necessary to perform appropriate heat treatment. As a result of research, the heat treatment conditions are as follows:
It was found that quenching at 700-850°C and tempering at 570-700°C are appropriate. Examples Examples of the present invention will be described below. Test materials of the present invention alloy and comparative alloy having the component bases shown in Table 1 were prepared using an ordinary high frequency induction furnace.
After melting in the atmosphere in a graphite crucible, half of this molten metal was pressure cast with a die to obtain an ingot of 80 mmφ x 200 mmL. Also, pour the remaining molten metal into the sand mold.
A No. F test material specified in JISH5114 was obtained. Next, a wear test piece of 5 x 5 x 20 mm was prepared from this sample material.
And a JIS No. 4 test piece for tensile test was cut out. As shown in Table 1, each test piece was heat-treated by quenching at 700-850°C for 1 hour and tempering at 570-700°C for 1 hour. Wear test conditions Test equipment: Hayama type abrasion tester Compatible material: SUS410 Dry method Circumferential speed 15 m/min Wet method Circumferential speed 30 m/min Lubricating conditions: Approximately 30 c.c./h of lubricating oil (No. 46) by dripping
Supply Also, in Table 1, Nos. 1 to 9 are alloys of the present invention, and Nos. 10 to 16 are alloys of the present invention.
is an example of a comparative alloy. In addition, P of the casting method is
Pressure casting is indicated, and S indicates sand casting. Comparative alloy No. 10 has good wear resistance, but its tensile strength decreases due to the high silicon content.
In addition, the elongation decreased despite the low Al content. Moreover, No. 14 is a comparative example with a high manganese content, and has poor wear resistance and low elongation. Moreover, No. 16 is ordinary aluminum bronze, which has good mechanical properties but poor wear resistance. In addition, No. 15 was obtained by changing the heat treatment conditions of No. 8 of the present invention outside the scope of the present invention, and the elongation was insufficient. In addition, Nos. 11, 12, and 13 all have an aluminum content of 8.5% to 10.5%, which is limited in the present invention.
% or less, and their wear resistance is good, but
The tensile strength and hardness are both low, so the requirements are not met. Effects of the Invention As described above, the present invention has excellent abrasion resistance and mechanical strength, with a tensile strength of 65 Kgf/mm 2 or more and an elongation of 15
% or more and hardness of HB180 (10/3000) or more. Therefore, compared to conventional wear-resistant aluminum bronze, it has excellent wear resistance, does not reduce its wear resistance, and has high mechanical strength. Therefore, when used in sliding members used under severe conditions, it has significant advantages.
【表】【table】
Claims (1)
5.0％、マンガン0.5〜2.0％、ニツケル0.5〜5.0％、
シリコン0.5〜1.5および残部銅からなり、基地中
にマンガン珪化物を分散させ、700〜850℃焼入、
570〜700℃焼戻の熱処理を行い、機械的強度が、
引張強さ65Kgｆ／mm2以上、伸び15％以上、硬度
HB18010/3000以上を満足させるものである事を
特徴とする耐摩耗性アルミニウム青銅。1. Aluminum 8.5~10.5%, iron 2.0~ by weight
5.0%, manganese 0.5-2.0%, nickel 0.5-5.0%,
Consisting of 0.5~1.5% silicon and the balance copper, manganese silicide is dispersed in the base, quenched at 700~850℃,
Heat treatment of 570-700℃ tempering is performed to improve mechanical strength
Tensile strength 65Kgf/ mm2 or more, elongation 15% or more, hardness
A wear-resistant aluminum bronze characterized by satisfying HB18010/3000 or higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13296489A JPH032340A (en) | 1989-05-26 | 1989-05-26 | Wear resistant aluminum bronze |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13296489A JPH032340A (en) | 1989-05-26 | 1989-05-26 | Wear resistant aluminum bronze |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH032340A JPH032340A (en) | 1991-01-08 |
| JPH0527698B2 true JPH0527698B2 (en) | 1993-04-22 |
Family
ID=15093623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13296489A Granted JPH032340A (en) | 1989-05-26 | 1989-05-26 | Wear resistant aluminum bronze |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH032340A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE244776T1 (en) * | 1999-10-29 | 2003-07-15 | Man B & W Diesel As | METHOD FOR PRODUCING MACHINE PARTS PROVIDED WITH AT LEAST ONE SLIDING SURFACE |
| CN104862522B (en) * | 2015-04-24 | 2016-11-23 | 中国科学院宁波材料技术与工程研究所 | A kind of nickel aluminum bronze and preparation method thereof |
| CN105568044A (en) * | 2015-12-25 | 2016-05-11 | 常州大学 | Copper alloy material for worm wheel of elevator traction machine and preparation technique and application of copper alloy material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52138014A (en) * | 1976-05-14 | 1977-11-17 | Hitachi Ltd | Wear resistant aluminum bronze |
| JPS5516749A (en) * | 1978-07-24 | 1980-02-05 | Nissan Motor Co Ltd | Coated electrode for surface hardening pudding |
-
1989
- 1989-05-26 JP JP13296489A patent/JPH032340A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52138014A (en) * | 1976-05-14 | 1977-11-17 | Hitachi Ltd | Wear resistant aluminum bronze |
| JPS5516749A (en) * | 1978-07-24 | 1980-02-05 | Nissan Motor Co Ltd | Coated electrode for surface hardening pudding |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH032340A (en) | 1991-01-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5012231B2 (en) | High-strength spheroidal graphite cast iron with excellent wear resistance | |
| CN103114245B (en) | A kind of abrasion-proof backing block and preparation method thereof | |
| WO2019080457A1 (en) | Nitrogen-containing microalloying spring steel and preparation method therefor | |
| WO2019080458A1 (en) | Micro-alloyed spring steel and preparation method thereof | |
| JP2022550358A (en) | Alloy structural steel and its manufacturing method | |
| CN108165828A (en) | A kind of abrasion-proof zinc-base alloy and preparation method thereof | |
| JPS6338418B2 (en) | ||
| JP4523230B2 (en) | Strengthened durable tool steel, method for producing the same, method for producing a member made of the steel, and member obtained | |
| CN109609835B (en) | High-toughness wear-resistant nodular cast iron and preparation process and application thereof | |
| JP5282546B2 (en) | High-strength, thick-walled spheroidal graphite cast iron with excellent wear resistance | |
| JP3723706B2 (en) | High-strength spheroidal graphite cast iron and method for producing the same | |
| JPH0527698B2 (en) | ||
| JP4256601B2 (en) | High strength spheroidal graphite cast iron | |
| JPS61177355A (en) | Outer layer material of composite roll for rolling | |
| JP5282547B2 (en) | High-strength, thick-walled spheroidal graphite cast iron with excellent wear resistance | |
| US20040022663A1 (en) | Production method of aluminum alloy for sliding bearing | |
| JP2798970B2 (en) | Wear-resistant sheave | |
| JP2636008B2 (en) | High strength and high wear resistant ductile cast iron material and method of manufacturing the same | |
| CN114787407B (en) | Alloy for high stress gouging abrasion | |
| JP2002275575A (en) | High strength spheroidal graphite cast iron and production method therefor | |
| SU1108123A1 (en) | Grey cast iron | |
| JPS62161909A (en) | Additive for manufacturing spheroidal graphite cast iron and vermicular cast iron | |
| JP2795557B2 (en) | Composite roll | |
| RU2144094C1 (en) | Steel | |
| SU1749290A1 (en) | Alloy addition for steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080422 Year of fee payment: 15 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090422 Year of fee payment: 16 |
|
| LAPS | Cancellation because of no payment of annual fees |