JPS6389645A - Valve steel - Google Patents
Valve steelInfo
- Publication number
- JPS6389645A JPS6389645A JP23378286A JP23378286A JPS6389645A JP S6389645 A JPS6389645 A JP S6389645A JP 23378286 A JP23378286 A JP 23378286A JP 23378286 A JP23378286 A JP 23378286A JP S6389645 A JPS6389645 A JP S6389645A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- alloy
- valve steel
- present
- resistance
- 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 24
- 239000010959 steel Substances 0.000 title claims abstract description 23
- 238000005260 corrosion Methods 0.000 claims abstract description 15
- 230000007797 corrosion Effects 0.000 claims abstract description 15
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 6
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 5
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 5
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 5
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 4
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 21
- 239000000956 alloy Substances 0.000 claims description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- 239000010941 cobalt Substances 0.000 claims description 7
- 229910017052 cobalt Inorganic materials 0.000 claims description 7
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 4
- 239000011651 chromium Substances 0.000 claims description 4
- 239000011572 manganese Substances 0.000 claims description 4
- 239000011733 molybdenum Substances 0.000 claims description 4
- 239000010955 niobium Substances 0.000 claims description 4
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 229910000990 Ni alloy Inorganic materials 0.000 abstract 2
- HTUMBQDCCIXGCV-UHFFFAOYSA-N lead oxide Chemical compound [O-2].[Pb+2] HTUMBQDCCIXGCV-UHFFFAOYSA-N 0.000 description 10
- 229910001347 Stellite Inorganic materials 0.000 description 9
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 9
- 239000000047 product Substances 0.000 description 9
- YEXPOXQUZXUXJW-UHFFFAOYSA-N lead(II) oxide Inorganic materials [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229910000464 lead oxide Inorganic materials 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は有鉛ガソリンに対する耐腐食性、耐摩耗性に優
れた弁用鋼に関する。ここで弁用鋼とは、自＃車等の内
燃機関に用いられる吸気弁、排気弁等を構成する材料で
ある。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a valve steel having excellent corrosion resistance and wear resistance against leaded gasoline. Here, valve steel is a material that constitutes intake valves, exhaust valves, etc. used in internal combustion engines such as automobiles.
［従来の技術］
自動車等の内燃機関の燃料にはガソリン系が高い比率で
使用され、国内的には無鉛ガソリンにほぼ移行した。し
かし国外では、有鉛ガソリンの使用が認可されており、
輸出用型では有鉛ガソリン仕様のエンジンが搭載されて
いる。この場合エンジンのバルブは、ガソリン燃料中に
含まれる鉛（Ｐｂ）による腐食に起因する摩耗が発生す
るために、バルブフェース面にステライト系の異種金属
を溶着して用いられることが多い。特に高負荷エンジン
では、弁用鋼として通常５（ＪＨ３５系合金が使用され
、この表面にステライト（＾Ｃｏ−高Ｏｒ合金）の肉盛
りが行われている。[Prior Art] Gasoline-based fuels are used at a high rate for internal combustion engines such as automobiles, and domestically there has been a transition to unleaded gasoline. However, outside Japan, the use of leaded gasoline is approved.
The export model is equipped with a leaded gasoline engine. In this case, engine valves suffer from wear due to corrosion due to lead (Pb) contained in gasoline fuel, so dissimilar metals such as stellite are often welded to the valve face. Particularly in high-load engines, 5 (JH35 series alloy) is usually used as the valve steel, and the surface of this alloy is overlaid with stellite (^Co-high Or alloy).
［発明が解決しようとする問題点］
上記従来の有鉛ガソリン仕様エンジンのバルブでは、ス
テライト合金が使用されているが、ステライト合金は多
量のコバルト（ＣＯ）を含有しており、ｃｏの原料供給
事情が不安定であるという問題があった。またバルブフ
ェース面にステライト合金を肉盛りする工程が増えるた
め、製造工程が複雑化し、生産コストも上昇するという
問題点があった。[Problems to be Solved by the Invention] A stellite alloy is used in the valves of the conventional leaded gasoline specification engine described above, but the stellite alloy contains a large amount of cobalt (CO), and it is difficult to supply the co raw material. The problem was that the situation was unstable. Furthermore, since the process of building up the stellite alloy on the valve face surface is increased, the manufacturing process becomes complicated and the production cost also increases.
本発明は上記した問題点に鑑みなされたものであり、そ
の目的は鉄基で有鉛ガソリンに対する耐腐食性、耐摩耗
性に優れた弁用鋼を捉供することにある。The present invention was made in view of the above-mentioned problems, and its purpose is to provide an iron-based valve steel having excellent corrosion resistance and wear resistance against leaded gasoline.
し問題点を解決するための手段］
本発明者は、有鉛ガソリン対応の耐ＰｂＯ性の良好な材
料を得んとして多数の鉄基合金を検討した結果、本発明
を完成したものである。Means for Solving the Problems] The present inventor has completed the present invention as a result of studying a number of iron-based alloys in an attempt to obtain a material with good PbO resistance that is compatible with leaded gasoline.
即ち、本発明の弁用鋼は重量％で、炭素が０゜２５〜０
．５０％、珪素が０．４０％以下、マンガンが５．０〜
１５．０％、ニッケルが５．０〜１５．０％、クロムが
１８，０〜２７．０％、モリブデン及びタングステンの
少なくとも一種が０゜５〜２．０％、ニオブ及びバナジ
ウムの少なくとも一種が０．１〜１．０％、コバルトが
５．０％以下、窒素が０．３５〜０．５５％、および不
可避の不純物が含まれ、残部鉄の合金からなることを特
徴とする有鉛ガソリンに対する耐腐食性、耐摩耗性に優
れたものである。That is, the valve steel of the present invention has a carbon content of 0°25 to 0% by weight.
．． 50%, silicon 0.40% or less, manganese 5.0~
15.0%, 5.0-15.0% nickel, 18.0-27.0% chromium, 0.5-2.0% at least one of molybdenum and tungsten, and at least one of niobium and vanadium. 0.1-1.0% cobalt, 5.0% or less cobalt, 0.35-0.55% nitrogen, and other unavoidable impurities, with the balance being an alloy of iron. It has excellent corrosion resistance and wear resistance.
本発明の弁用鋼は、時効によって炭窒化物等を組織中に
析出させ、これによって機械的性質が強化される合金で
ある。The valve steel of the present invention is an alloy in which carbonitrides and the like are precipitated into the structure by aging, thereby strengthening mechanical properties.
本発明において炭素は窒素と作用して炭窒化物を生成し
て、組織を強化する為に不可欠である。In the present invention, carbon is essential because it interacts with nitrogen to form carbonitrides and strengthen the structure.
炭素は少なすぎても多すぎても弁用鋼の強度は低下する
。そのため炭素は０．２５〜０．５０％にする必要があ
る。If the carbon content is too low or too high, the strength of the valve steel will decrease. Therefore, carbon needs to be 0.25 to 0.50%.
珪素は耐酸化鉛性に非常に有害な元素であり、含有量は
少ない事が望ましいが溶解時の脱酸剤として有効なので
必要最低限の添加が望ましく０゜４０％以下とした。Silicon is an element that is very harmful to lead oxide resistance, and it is desirable that the content be small, but since it is effective as a deoxidizing agent during melting, it is desirable to add the minimum necessary amount, which is 0.40% or less.
マンガンはオーステナイトを安定化させ、高価なニッケ
ルの代替元素として作用する。マンガンは有鉛ガソリン
燃料時に生ずる酸化鉛に対し有効に作用し、最低限５％
必要である。但し１５％を越えると高温の耐酸化性が劣
化する。ニッケルはオーステナイト生成元素で最低５％
は必要で、１５％以上では強度が低下する。Manganese stabilizes austenite and acts as a replacement element for the expensive nickel. Manganese has an effective effect on lead oxide produced when leaded gasoline fuel is used, and has a minimum content of 5%.
is necessary. However, if it exceeds 15%, high temperature oxidation resistance deteriorates. Nickel is an austenite-forming element with a minimum content of 5%
is necessary, and if it exceeds 15%, the strength will decrease.
クロムは弁用鋼の耐腐食性向上に不可欠な元素で、最低
限１８％必要である。但し２７％を越えるとシグマ相が
多量に析出して脆くなる。Chromium is an essential element for improving the corrosion resistance of valve steel, and is required at a minimum of 18%. However, if it exceeds 27%, a large amount of sigma phase will precipitate, resulting in brittleness.
モリブデン、タングステンは基地に固溶すると同時に一
部炭窒化物を形成して高温の強度を維持する。そのため
モリブデン及びタングステンの少なくとも一種は最低限
０．５％が必要であり、２゜０％で効果は飽和する。Molybdenum and tungsten form a solid solution in the matrix and at the same time partially form carbonitrides to maintain high-temperature strength. Therefore, at least one of molybdenum and tungsten is required to be present at a minimum of 0.5%, and the effect is saturated at 2.0%.
ニオブとバナジウムは微細な炭窒化物を形成し、オース
テナイトの結晶粒粗大化を防止して、高温強度の低下に
有効に作用する。そのためニオブ及びバナジウムの少な
くとも一種は０．１〜１．０％にする必要がある。Niobium and vanadium form fine carbonitrides, prevent coarsening of austenite crystal grains, and effectively reduce high-temperature strength. Therefore, at least one of niobium and vanadium must be contained in an amount of 0.1 to 1.0%.
コバルトは、本発明合金の中で特に顕著な作用をもたら
す元素で耐ＰｂＯ性の向上に寄与する。Cobalt is an element that has a particularly remarkable effect in the alloy of the present invention and contributes to improving the PbO resistance.
コバルトは、添加量に比例して上記効果を発揮するが、
５％以上では効果が飽和する。Cobalt exhibits the above effects in proportion to the amount added, but
At 5% or more, the effect is saturated.
窒素は炭素と作用して炭窒化物を形成して高温の強度を
維持する。そのため窒素は最低限０．３５％必要である
。但し０．５５％以上は本発明合金に固溶しない。Nitrogen interacts with carbon to form carbonitrides to maintain high-temperature strength. Therefore, a minimum nitrogen content of 0.35% is required. However, 0.55% or more is not dissolved in the alloy of the present invention.
本発明の弁用鋼は上記した主要元素と不可避の不純物と
残部Ｆｅから構成される合金である。The valve steel of the present invention is an alloy composed of the above-mentioned main elements, unavoidable impurities, and the remainder Fe.
次に本発明の弁用鋼の代表的な製造方法を説明する。ま
ず、大気溶解炉にて溶解精錬後、造塊し、鍛造、圧延で
所定の棒鋼を製造する。次に棒鋼を１１００℃にて１５
分から６０分保持した後水冷する。この処理は固溶化処
理であり、炭窒化物を地に固溶させるために行う。そし
て水冷した後再び７５０℃に加熱して４時間保持しその
後空冷する。Next, a typical manufacturing method of the valve steel of the present invention will be explained. First, it is melted and refined in an atmospheric melting furnace, then ingot-formed, forged, and rolled to produce a specified steel bar. Next, the steel bar was heated to 1100℃ for 15 minutes.
After holding for 60 minutes, cool with water. This treatment is a solid solution treatment, and is performed to dissolve carbonitrides into the ground. After cooling with water, it is heated again to 750°C, held for 4 hours, and then cooled in air.
し発明の効果〕
本発明の弁用鋼は、耐腐食性（耐ＰｂＯ性）、耐摩耗性
に優れたものである。従って有鉛ガソリン仕様エンジン
の弁フェースに使用した場合でも、摩耗量が少ないもの
となる。即ちＰｂＯ腐食量は９２０℃ＸＩＨで１００ｍ
Ｑ／ａ１− Ｈ以下、ＪＩｓ−３ＵＨ３５系合金の約半
分であり、高ｃ。Effects of the Invention The valve steel of the present invention has excellent corrosion resistance (PbO resistance) and wear resistance. Therefore, even when used on the valve face of a leaded gasoline specification engine, the amount of wear is small. In other words, the amount of PbO corrosion is 100m at 920℃XIH
Q/a1-H or less, about half that of JIs-3UH35 series alloys, and high c.
−高Ｃｒ系のステライトＮ００６とほぼ同等の値を示す
。しかして、有鉛ガソリン仕様の排気弁用鋼として、肉
盛りをしなくても使用出来る。- Shows almost the same value as high Cr Stellite N006. Therefore, it can be used as an exhaust valve steel for leaded gasoline without any build-up.
本発明の効果を以下の試験例で立証する。The effects of the present invention will be demonstrated in the following test examples.
［試験例］
まず大気高周波炉にて３ｋＱのインゴットをつくり、鍛
造、圧延によって７種類の試料を作製した。７種類の試
料の合金組成は第１表に示す。ここで試料Ｎ００１〜Ｎ
００３は本発明品であり、試料Ｎｏ、４〜Ｎｏ、７は比
較例である。比較例のうち試料Ｎｏ、６は従来弁用鋼と
して用いられているＪ ｌ５−８ＵＨ３５系合金であり
、又試料Ｎｏ、７はステライト合金Ｎｏ、６である。[Test Example] First, a 3 kQ ingot was made in an atmospheric high frequency furnace, and seven types of samples were made by forging and rolling. The alloy compositions of the seven samples are shown in Table 1. Here, samples N001 to N
003 is a product of the present invention, and samples No. 4 to No. 7 are comparative examples. Among the comparative examples, sample No. 6 is a J15-8UH35 alloy conventionally used as valve steel, and sample No. 7 is a stellite alloy No. 6.
そして第１表に示す組成の各試料を約１１ｏＯ℃に３０
分保持した後水冷した。次に再び７５０℃に加熱して４
時間保持した後空冷した。Then, each sample having the composition shown in Table 1 was heated to about 11oO℃ for 30 minutes.
After holding for a minute, it was cooled with water. Next, heat to 750℃ again and
After holding for an hour, it was air cooled.
まず本発明品及び比較例を用いて耐Ｐｂｏ腐食試験を行
った。試験方法は、アルミナルツボ中に一酸化鉛を９２
０℃に加熱し、φ１０ｘｌＯＪの各試料を１時間浸漬し
腐食減量を測定した。結果を第２表に示す。First, a Pbo corrosion resistance test was conducted using the products of the present invention and comparative examples. The test method was to place 92% of lead monoxide in an alumina crucible.
It was heated to 0° C., and each sample of φ10×1 OJ was immersed for 1 hour to measure the corrosion loss. The results are shown in Table 2.
本発明品である試料Ｎ０１１〜Ｎｏ、３の場合ＰｂＯ腐
食減回は８０〜１００ｍｇ／ｃｍ２−Ｈであり、これに
対し試料Ｎｏ、６の場合には２３０ｍＱ／Ｃ１１ｚ−Ｈ
と大きかった。試料Ｎ０９７は５０ｍΩ／Ｃ１・Ｈであ
り、本発明品は、ステライト合金ＮＯ３６に匹敵する腐
食減量である。In the case of samples No. 3 to No. 3, which are products of the present invention, the PbO corrosion reduction is 80 to 100 mg/cm2-H, whereas in the case of sample No. 6, it is 230 mQ/C11z-H.
It was big. Sample No. 097 has a resistance of 50 mΩ/C1·H, and the product of the present invention has a corrosion loss comparable to that of Stellite alloy NO36.
本発明品を排気弁に成形し、有鉛ガソリン仕様エンジン
にて実機評価を行った。試験条件は回転数６６０Ｏｒｐ
ｍ、２００ｈｒｔ’あり、排気弁の作動温度は７８０〜
８３０℃であった。試験の結果を図に示す。The product of the present invention was molded into an exhaust valve and evaluated using a leaded gasoline engine. Test conditions are rotation speed 660 Orp.
m, 200hr', the operating temperature of the exhaust valve is 780~
The temperature was 830°C. The results of the test are shown in the figure.
試験後のバルブフェース摩耗量は、本発明品では平均１
５μｍ〜２５μｍ１比較材の５ＵＨ３５系合金では平均
４０μｍ１肉盛りパルプ（ＳＵＨ３５系合金にステライ
ト合金Ｎ０８６を溶着）では平均１０μｍであった。The valve face wear amount after the test was 1 on average for the product of the present invention.
5 μm to 25 μm 1 Comparative material of 5UH35 alloy had an average of 40 μm and 1 overlay pulp (Stellite alloy N086 welded to SUH35 alloy) had an average of 10 μm.
図に示すバルブフェース摩耗量と耐ＰｂＯ性とは明らか
に相関が認められ、耐ＰｂＯ性の向上により耐摩耗性の
向上が計られる。よって本発明品は十分な耐摩耗性を有
しており、バルブフェースに肉盛りを行わなくとも有鉛
燃料用のバルブとしての性能を確保出来る。There is a clear correlation between the amount of valve face wear shown in the figure and the PbO resistance, and an improvement in the PbO resistance means that the wear resistance is improved. Therefore, the product of the present invention has sufficient wear resistance, and can ensure performance as a valve for leaded fuel without building up the valve face.
次に本発明品および比較例を用いて熱間疲労強度を調べ
た。試験温度は８５０℃とし、試験方法は小野式回転曲
げ疲労試験により行なった。試験結果を第３表に示す。Next, hot fatigue strength was examined using the products of the present invention and comparative examples. The test temperature was 850°C, and the test method was the Ono rotary bending fatigue test. The test results are shown in Table 3.
（以下余白）
第 ２ 表 ９２０℃に於（プる耐Ｐ
ｂｏ性第 ３ 表 ８５０℃に於ける熱間
疲労強度本発明品である試料Ｎｏ、１〜Ｎ００３の場合
いずれも１５ｋＯｆ／ｍｓ２以上であった。この値は汎
用弁用鋼であるＪＩＳ−８ＵＨ３５系合金と同等以上で
ある。(Left below) Table 2 At 920℃ (P resistance)
Table 3: Hot fatigue strength at 850°C In all cases of samples No. 1 to No. 003, which are products of the present invention, the strength was 15 kOf/ms2 or more. This value is equal to or higher than that of JIS-8UH35 series alloy, which is a general-purpose valve steel.
図はｐｂｏ＊食減量とバルブフェース摩耗量との関係を
示すグラフである。
特許出願人 トヨタ自動車株式会社同 東
北特殊鋼株式会社
同 愛三工業株式会社
代理人 弁理士 大川 宏
同 弁理士 丸山明夫The figure is a graph showing the relationship between pbo* food loss and valve face wear amount. Patent applicant Toyota Motor Corporation Tohoku Steel Co., Ltd. Aisan Kogyo Co., Ltd. Agent Patent attorney Hirodo Okawa Patent attorney Akio Maruyama
Claims (3)
．４０％以下、マンガンが５．０〜１５．０％、ニッケ
ルが５．０〜１５．０％、クロムが１８．０〜２７．０
％、モリブデン及びタングステンの少なくとも一種が０
．５〜２．０％、ニオブ及びバナジウムの少なくとも一
種が０．１〜１００％、コバルトが５．０％以下、窒素
が０．３５〜０．５５％、および不可避の不純物が含ま
れ残部鉄の合金からなることを特徴とする有鉛ガソリン
に対する耐腐食性、耐摩耗性に優れた弁用鋼。(1) 0.25 to 0.50% carbon and 0 silicon by weight%
．． 40% or less, manganese 5.0-15.0%, nickel 5.0-15.0%, chromium 18.0-27.0%
%, at least one of molybdenum and tungsten is 0
．． 5 to 2.0%, at least one of niobium and vanadium 0.1 to 100%, cobalt 5.0% or less, nitrogen 0.35 to 0.55%, and unavoidable impurities, the balance being iron. A valve steel that is made of an alloy and has excellent corrosion resistance and wear resistance against leaded gasoline.
量は１００ｍｇ／ｃｍ＾２・Ｈ以下である特許請求の範
囲第１項記載の弁用鋼。(2) The valve steel according to claim 1, which has a lead oxidation corrosion resistance loss of 100 mg/cm^2·H or less when held at 920° C. for 1 hour.
２以上である特許請求の範囲第１項記載の弁用鋼。(3) Fatigue strength at 850℃ is 15kgf/mm^
The valve steel according to claim 1, which is 2 or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23378286A JPS6389645A (en) | 1986-10-01 | 1986-10-01 | Valve steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23378286A JPS6389645A (en) | 1986-10-01 | 1986-10-01 | Valve steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6389645A true JPS6389645A (en) | 1988-04-20 |
Family
ID=16960480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23378286A Pending JPS6389645A (en) | 1986-10-01 | 1986-10-01 | Valve steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6389645A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03177543A (en) * | 1989-12-05 | 1991-08-01 | Toyota Motor Corp | Valve steel |
| US5064610A (en) * | 1989-08-02 | 1991-11-12 | Hitachi Metals, Ltd. | Heat resistant steel for use as material of engine valve |
| JPH03291359A (en) * | 1990-04-10 | 1991-12-20 | Fuji Oozx Kk | Heat resisting material for internal combustion engine exhaust valve and the like |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5040099A (en) * | 1973-07-16 | 1975-04-12 | ||
| JPS51122613A (en) * | 1975-04-21 | 1976-10-26 | Daido Steel Co Ltd | Drawing workable high performance exhaust valve steel |
| JPS6077964A (en) * | 1983-10-04 | 1985-05-02 | Toyota Motor Corp | Steel used for valve |
-
1986
- 1986-10-01 JP JP23378286A patent/JPS6389645A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5040099A (en) * | 1973-07-16 | 1975-04-12 | ||
| JPS51122613A (en) * | 1975-04-21 | 1976-10-26 | Daido Steel Co Ltd | Drawing workable high performance exhaust valve steel |
| JPS6077964A (en) * | 1983-10-04 | 1985-05-02 | Toyota Motor Corp | Steel used for valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5064610A (en) * | 1989-08-02 | 1991-11-12 | Hitachi Metals, Ltd. | Heat resistant steel for use as material of engine valve |
| JPH03177543A (en) * | 1989-12-05 | 1991-08-01 | Toyota Motor Corp | Valve steel |
| JPH03291359A (en) * | 1990-04-10 | 1991-12-20 | Fuji Oozx Kk | Heat resisting material for internal combustion engine exhaust valve and the like |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114672738B (en) | High performance iron-based alloys for engine valve train applications, methods of making and uses thereof | |
| WO2010070949A1 (en) | Spheroidal graphite cast iron | |
| JP3422561B2 (en) | Heat and creep resistant steel with martensitic structure obtained by heat treatment | |
| JPH02290950A (en) | Ferritic heat resisting steel excellent in strength at high temperature | |
| JP4222705B2 (en) | Manufacturing method of high purity high Cr ferritic heat resistant steel and high purity high Cr ferritic heat resistant steel | |
| CN111394640A (en) | Iron-nickel gas valve alloy and preparation method thereof | |
| US20040184946A1 (en) | High-strength, heat-resistant alloy for exhaust valves with improved overaging-resistance | |
| US3990892A (en) | Wear resistant and heat resistant alloy steels | |
| US20070221298A1 (en) | Ni-based super alloy | |
| US4650645A (en) | Heat-resisting steels | |
| US4871512A (en) | Alloys for exhaust valve | |
| US5064610A (en) | Heat resistant steel for use as material of engine valve | |
| JP2947913B2 (en) | Rotor shaft for high temperature steam turbine and method of manufacturing the same | |
| JPS6389645A (en) | Valve steel | |
| JPH03177543A (en) | Valve steel | |
| JPS6070166A (en) | Creep and oxidation resistant low-alloy steel | |
| JPH1036944A (en) | Martensitic heat resistant steel | |
| JPH0364588B2 (en) | ||
| JPS6043473A (en) | Anticorrosive chromium-nickel-manganese-iron alloy | |
| JPS59211557A (en) | Heat-resistant steel | |
| JPS6213428B2 (en) | ||
| JP3744083B2 (en) | Heat-resistant alloy with excellent cold workability | |
| JP2896228B2 (en) | Manufacturing method of engine valve | |
| JPH04193932A (en) | Heat resistant alloy for engine valve | |
| JPH03122257A (en) | Piston ring material |