JPH04112999A - Water pump vane for cooling engine - Google Patents
Water pump vane for cooling engineInfo
- Publication number
- JPH04112999A JPH04112999A JP23414590A JP23414590A JPH04112999A JP H04112999 A JPH04112999 A JP H04112999A JP 23414590 A JP23414590 A JP 23414590A JP 23414590 A JP23414590 A JP 23414590A JP H04112999 A JPH04112999 A JP H04112999A
- Authority
- JP
- Japan
- Prior art keywords
- water pump
- pump vane
- stainless steel
- toughness
- less
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 238000001816 cooling Methods 0.000 title claims abstract description 15
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 15
- 239000010935 stainless steel Substances 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 3
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 10
- 230000007797 corrosion Effects 0.000 abstract description 10
- 229910052758 niobium Inorganic materials 0.000 abstract description 3
- 239000012535 impurity Substances 0.000 abstract description 2
- 229910000859 α-Fe Inorganic materials 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、エンジン冷却用ウォータポンプベーンに関
するものである。さらに詳しくは、この発明は、耐食性
とともに靭性に優れ、耐久性の良好なエンジン冷却用ウ
ォータポンプベーンに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) This invention relates to a water pump vane for engine cooling. More specifically, the present invention relates to an engine cooling water pump vane that has excellent corrosion resistance, toughness, and good durability.
（従来の技術とその課題）
従来より、自動車等のエンジンの水冷装置として、ラジ
ェターとエンジン水冷部とを連通ずる水路部にウォータ
ポンプを設け、このポンプに、ウォータポンプベーンを
配設してきている。(Prior art and its problems) Traditionally, as a water cooling system for an engine such as an automobile, a water pump has been installed in a water channel that communicates the radiator and the engine water cooling section, and a water pump vane has been installed in this pump. .
このウォータポンプベーンとしては、過去、鋳物や普通
鋼板金加工体が用いられてきたか、耐食性が低いため、
これを改善するためにステンレス鋼が用いられるように
なってきている。In the past, castings or processed ordinary steel sheet metal bodies have been used for these water pump vanes, or because they have low corrosion resistance,
To improve this, stainless steel is being used.
しかしながら、通常でも３０００〜５０００、さらには
８０００回転にも達する回転速度と高圧水圧という苛酷
な環境にさらされる自動車エンジン冷却用等のウォータ
ポンプベーンの場合、これまでのステンレス鋼からなる
ものでは靭性低下のなめに疲労破壊が生じ、羽根部にお
いて折損の発生が避けられないという欠点があった。こ
のため、その耐久性の向上には限界があった。However, in the case of water pump vanes for automobile engine cooling, etc., which are exposed to harsh environments with rotational speeds of 3,000 to 5,000 or even 8,000 rpm and high water pressure, conventional stainless steel vanes have reduced toughness. There was a drawback that fatigue failure occurred at the tip of the blade, and breakage of the blades was unavoidable. For this reason, there was a limit to the improvement of its durability.
このような問題点を解決するための手段として焼鈍加工
によって靭性を向上させることが考えられるが、これま
でのステンレス鋼の場合にはこの加工によってウォータ
ポンプベーンの軸部が軟化し、必要なねじりトルクか得
られないという問題があった。One possible way to solve these problems is to improve the toughness by annealing, but in the case of conventional stainless steel, this process softens the shaft of the water pump vane and reduces the necessary torsion. There was a problem with not being able to get enough torque.
このため、高速回転、高圧水圧という条件に耐え、加工
容易で、かつ低コストな、耐食性、強度および靭性とも
に優れた新しいエンジン冷却用のウォータポンプベーン
の実現が強く望まれていた。Therefore, there has been a strong desire to create a new water pump vane for engine cooling that can withstand high speed rotation and high water pressure conditions, is easy to process, is low cost, and has excellent corrosion resistance, strength, and toughness.
（課題を解決するための手段）
この発明は、上記の通りの課題を解決するものとしてな
されたものであり、重量％として、ｃ ：０．０５％
以下、
Ｐ ： ０．０４０％以下、
Ｓ ：０．０３％以下、
Ｓ ｉ ： １．０％以下、
Ｍｎ：１．０％以下、
Ｃｒ ： １１．５〜２２．０％、
Ｎ ｂ ： ０．０５〜０．８０％、
Ｎ ：０．０３％以下、
残部Ｆｅおよび不純物成分
の組成のフェライト系高靭性ステンレス鋼成形体からな
ることを特徴とするエンジン冷却用ウォータポンプベー
ンを提供するものである。(Means for Solving the Problems) This invention has been made to solve the problems as described above, and in terms of weight %, c: 0.05%
Below, P: 0.040% or less, S: 0.03% or less, Si: 1.0% or less, Mn: 1.0% or less, Cr: 11.5-22.0%, Nb: 0 05 to 0.80%, N: 0.03% or less, the balance being Fe and impurity components. be.
またこの発明は、上記組成に、さらに、Ｃｕ ： ０．
２〜１．０％、
Ｍ ｏ ： ０．０１〜０．５０％、
Ｎ ｉ ： ０．０２〜１．５０％、
Ｔ ｉ ： ０．０５〜０．５０％
から選ばれる１種または２種以上を含む高靭性ステンレ
ス鋼成形体からなることを特徴とするエンジン冷却用ウ
ォータポンプベーンをも提供する。Moreover, this invention further includes Cu: 0.
2 to 1.0%, Mo: 0.01 to 0.50%, Ni: 0.02 to 1.50%, and Ti: 0.05 to 0.50%. The present invention also provides an engine cooling water pump vane characterized by being made of a high-toughness stainless steel molded body including the above.
この発明のポンプベーンは、耐食性、強度、靭性ともに
優れたものとなる。The pump vane of the present invention has excellent corrosion resistance, strength, and toughness.
上記組成の限定については以下の理由による。The above composition limitation is due to the following reasons.
Ｃ：Ｃ（炭素）は強度の向上に寄与する元素であるが、
添加したＮｂと結合して炭化物を形成し、析出した炭化
物は発銹の起点となって耐食性を低下させることがある
。また、Ｎｂの添加効果を低減させる。そのため、添加
割合は０．０５％以下とする。C: C (carbon) is an element that contributes to improving strength,
It combines with the added Nb to form carbides, and the precipitated carbides may become a starting point for rusting and reduce corrosion resistance. Furthermore, the effect of adding Nb is reduced. Therefore, the addition ratio is set to 0.05% or less.
Ｐ：フェライト系ステンレス鋼の冷間加工性を低下させ
、曲げ成形性を悪化させるのでなるべく少くしておく、
このため、０．０４０％以下とする。P: Reduce cold workability and bending formability of ferritic stainless steel, so keep it as low as possible.
Therefore, it is set to 0.040% or less.
Ｓ：上記Ｐと同様に理由により、その割合は０．０３％
以下とする。S: Due to the same reason as P above, the percentage is 0.03%
The following shall apply.
Ｓｉ：鋼溶製時において脱酸作用を有しているとともに
、耐酸化性を増大させる作用がある。しかしながら、多
量すぎると靭性を劣化させる。Si: Has a deoxidizing effect during steel production and also has an effect of increasing oxidation resistance. However, if the amount is too large, the toughness will deteriorate.
このため、１．０％以下とする。Therefore, the content should be 1.0% or less.
Ｍｎ：鋼溶製時において脱酸・脱硫作用を有していると
ともに、機械的性質を改善する。ただし、多すぎるとプ
レスおよび曲げ成形性を害する。Mn: Has deoxidizing and desulfurizing effects during steel melting and improves mechanical properties. However, if it is too large, press and bending properties will be impaired.
このなめ、ＬＯ％以下とする。This lick should be below LO%.
Ｃｒ：フェライト系ステンレス鋼の基本元素であり、良
好な耐食性を得るために１１．５％以上とする。しかし
、あまり過剰であると加工性を低下させ、曲げ成形を良
好とすることができなくなるので、２２．０％以下とす
る。Cr: A basic element of ferritic stainless steel, and should be 11.5% or more in order to obtain good corrosion resistance. However, if it is too excessive, the workability will deteriorate and bending will not be good, so the content should be 22.0% or less.
Ｎｂ：フェライト系ステンレス鋼の靭性を向上させて曲
げ成形性を良好とする。この作用を得るために、０，０
５％以上添加する。Nb: Improves the toughness of ferritic stainless steel and improves bending formability. To obtain this effect, 0,0
Add 5% or more.
しかし、あまり過剰であると、脆性遷移温度が高くなっ
て靭性がかえって劣化することになるので、０．８０％
以下の添加量とする。However, if it is too excessive, the brittle transition temperature will increase and the toughness will deteriorate, so 0.80%
The amount added is as follows.
Ｎ：Ｎｂと結合して窒化物を形成し、析出しな窒化物が
発銹の起点となって耐食性を低下させることがある。ま
た、Ｎｂの添加効果を低減させるので、０．０３％以下
の割合とする。N: Combines with Nb to form nitrides, and precipitated nitrides may become a starting point for rusting and reduce corrosion resistance. Further, since the effect of adding Nb is reduced, the ratio is set to 0.03% or less.
Ｃｕ ；Ｍｏ ；Ｎｉ ；Ｔｉ
これらはフェライト系ステンレス鋼の耐食性を向上させ
るが、あまり過剰であると加工性や靭性および延性を低
下させ、特にＭＯの場合にはあまり多量に加えると強度
が向上しすぎて曲げ成形性を低下させることになる。こ
のため、Ｃｕ ： ０．２〜１．０％、Ｍ ｏ ： ０
．０１〜０．５０％、Ｎｉ：０．０２〜１．５０％およ
びＴ ｉ ： ０．０５〜０．５％の範囲で、これら元
素の１種または２種以上添加することができる。Cu;Mo;Ni;Ti These improve the corrosion resistance of ferritic stainless steel, but if they are in excess, they reduce workability, toughness, and ductility, and especially in the case of MO, adding too much will not improve the strength. If it is too much, the bending formability will be reduced. Therefore, Cu: 0.2-1.0%, Mo: 0
．． One or more of these elements can be added in the ranges of 0.01 to 0.50%, Ni: 0.02 to 1.50%, and Ti: 0.05 to 0.5%.
このような組成成分を有するフェライト系ステンレス鋼
からなるこの発明のエンジン冷却用のウォータポンプベ
ーンは、たとえば帯鋼を円形に打抜き、軸部をプレス加
工によって成形し、羽根部を所定の形状に切断した後に
、羽根部周縁を折り曲げ加工することにより成形するこ
とができる。The water pump vane for engine cooling of the present invention, which is made of ferritic stainless steel having such compositional components, is produced by, for example, punching a steel band into a circular shape, forming the shaft part by press working, and cutting the vane part into a predetermined shape. After that, the blade portion can be shaped by bending the peripheral edge of the blade portion.
以下、実施例を示し、さらに詳しくこの発明のウォータ
ポンプベーンについて説明する。EMBODIMENT OF THE INVENTION Hereinafter, Examples will be shown and the water pump vane of the present invention will be explained in more detail.
実施例１〜２
次の表１の成分〈重量％〉
表
からなるステンレス鋼の帯鋼を円形に打抜き、軸部のプ
レス加工、羽根部切断、および羽根周縁の折り曲げ加工
によって、外径的８０ｍの自動車エンジン冷却用のウォ
ータポンプベーンを製造した。Examples 1 to 2 A stainless steel strip consisting of the ingredients shown in Table 1 below (wt%) was punched into a circular shape, and the shaft part was pressed, the blade part was cut, and the blade periphery was bent to form a material with an outer diameter of 80 m. The company manufactured water pump vanes for automobile engine cooling.
また、比較のために、従来より用いられているステンレ
ス鋼材Ｓ ５ＵＳ４３０によっても同様のウォータポン
プベーンを製造した。このものは、ＮｂおよびＣ，Ｈの
成分割合の点において本発明のものと相違している。す
なわちＮｂが添加されず、ＣおよびＮの量が多い。For comparison, a similar water pump vane was also manufactured using stainless steel S5US430, which has been used in the past. This material differs from that of the present invention in terms of the component proportions of Nb, C, and H. That is, no Nb is added, and the amounts of C and N are large.
両者を使用してその耐久性を評価したところ、実施例１
および２製品
＝７００時間以上たっても折損はない
５ＵＳ４３０製品：４００時間で羽根部折損の発生の結
果が得られた。５ＵＳ４３０製品の場合には、羽根折り
曲げ部に多数の微小クラックが発生していた。When both were used to evaluate their durability, Example 1
and 2 products = no breakage even after 700 hours 5US430 product: blade breakage occurred after 400 hours. In the case of the 5US430 product, a large number of microcracks were generated at the bent portion of the blade.
また、耐誘性について塩水噴霧試験（ＪＩＳＺ２３７１
）を行ったところ、実施例１および２製品には発錆は
なかったが、５ＵＳ４３０製品には発錆が認められた。In addition, the salt spray test (JISZ2371
), there was no rust in the products of Examples 1 and 2, but rust was observed in the 5US430 product.
実施例３
実施例１および２と同様のポンプベーンについて、その
素材の加工硬化特性について評価した。Example 3 Pump vanes similar to those in Examples 1 and 2 were evaluated for their work hardening properties.
表２は冷間圧下率（％）と伸び（％）について示したも
のである。実施例１および２製品の場合には５０％の圧
下率においても４％程度の伸びを示し、加工性に優れて
いることがわがる。Table 2 shows the cold rolling reduction (%) and elongation (%). In the case of the products of Examples 1 and 2, they showed an elongation of about 4% even at a rolling reduction of 50%, indicating that they had excellent workability.
また、圧下率５０％における抗張力についてみると、次
に示したように、５ＵＳ４３０に比べて優れた特性を有
していることがわかる。Furthermore, when looking at the tensile strength at a rolling reduction of 50%, it can be seen that it has superior properties compared to 5US430, as shown below.
実施例１および２製品
８６〜９６眩ｆ／圓２
ＳＵＳ４３０品 ８０〜９０ ｋｓｒ ｆ／ｍｎ ２
また、その硬度も次のように優れたものであった。Example 1 and 2 products 86-96 dazzle f/mn 2 SUS430 product 80-90 ksr f/mn 2
Moreover, its hardness was also excellent as shown below.
実施例１および２製品
Ｈｖ（ｂｇ） ２５０〜２６０
ＳｔｌＳ４３０品 Ｈｖ （ｌｑｒ ） ２２０〜
２３０なお、本発明品の場合には、５０％圧下卑におい
ても圧延方向および圧延方向と直角方向との機械的性質
の差はきわめてわずかであった。Example 1 and 2 products Hv (bg) 250~260 StlS430 product Hv (lqr) 220~
230 In the case of the product of the present invention, even at 50% reduction, the difference in mechanical properties in the rolling direction and in the direction perpendicular to the rolling direction was extremely small.
伸び（Ｅｌｌ
（％）
（発明の効果）
以上詳しく説明した通り、この発明により、耐食性、強
度はもとより、靭性に優れ、加工性の良好な高耐久性エ
ンジン冷却用ウォータポンプベーンが得られる。自動車
用、産業用、船舶、その他のエンジン冷却用として優れ
た性能のウォータポンプベーンか提供される。Elongation (Ell (%)) (Effects of the Invention) As explained in detail above, the present invention provides a highly durable water pump vane for engine cooling that has not only corrosion resistance and strength but also excellent toughness and workability. We offer superior performance water pump vanes for commercial, industrial, marine and other engine cooling applications.
Claims (2)
とするエンジン冷却用ウォータポンプベーン。(1) In weight%, C: 0.05% or less, P: 0.040% or less, S: 0.03% or less, Si: 1.0% or less, Mn: 1.0% or less, Cr: 11 An engine cooling device characterized by being made of a high-toughness stainless steel molded body having a composition of: water pump vane.
ス鋼成形体からなることを特徴とするエンジン冷却用ウ
ォータポンプベーン。(2) In addition to the composition described in claim (1), Cu: 0.2-1.0%, Mo: 0.01-0.50%, Ni: 0.02-1.50%, Ti: 0 A water pump vane for engine cooling, characterized in that it is made of a high-toughness stainless steel molded body containing one or more types selected from .05 to 0.50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23414590A JPH04112999A (en) | 1990-09-03 | 1990-09-03 | Water pump vane for cooling engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23414590A JPH04112999A (en) | 1990-09-03 | 1990-09-03 | Water pump vane for cooling engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04112999A true JPH04112999A (en) | 1992-04-14 |
Family
ID=16966352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23414590A Pending JPH04112999A (en) | 1990-09-03 | 1990-09-03 | Water pump vane for cooling engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04112999A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5456165A (en) * | 1993-04-20 | 1995-10-10 | The Minster Machine Company | Method for adjustment in motion of press shutheight |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49128816A (en) * | 1973-04-16 | 1974-12-10 | ||
| JPH02205631A (en) * | 1989-02-01 | 1990-08-15 | Kobe Steel Ltd | Production of high-mn nonmagnetic steel excellent in very low temperature characteristic after formation and heat treatment of nb3sn |
-
1990
- 1990-09-03 JP JP23414590A patent/JPH04112999A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49128816A (en) * | 1973-04-16 | 1974-12-10 | ||
| JPH02205631A (en) * | 1989-02-01 | 1990-08-15 | Kobe Steel Ltd | Production of high-mn nonmagnetic steel excellent in very low temperature characteristic after formation and heat treatment of nb3sn |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5456165A (en) * | 1993-04-20 | 1995-10-10 | The Minster Machine Company | Method for adjustment in motion of press shutheight |
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