JPH0960510A - Manufacture of engine valve made of titanium alloy - Google Patents
Manufacture of engine valve made of titanium alloyInfo
- Publication number
- JPH0960510A JPH0960510A JP23920695A JP23920695A JPH0960510A JP H0960510 A JPH0960510 A JP H0960510A JP 23920695 A JP23920695 A JP 23920695A JP 23920695 A JP23920695 A JP 23920695A JP H0960510 A JPH0960510 A JP H0960510A
- Authority
- JP
- Japan
- Prior art keywords
- engine valve
- alloy
- rib
- alloy engine
- treating
- 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
- Forging (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、Ｔｉ合金製エン
ジンバルブの製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a Ti alloy engine valve.
【０００２】[0002]
【従来の技術】従来、Ｔｉ合金製エンジンバルブは、強
靭で耐熱鋼製エンジンバルブに比べて軽量であるところ
から、これを組込むことによりエンジンの回転数を大幅
に増大することができると言われている。しかし、Ｔｉ
合金製エンジンバルブは高価であるために、スポーツカ
ー、レーシングカーなどの特殊な自動車のエンジンバル
ブに使用されていた。2. Description of the Related Art Conventionally, Ti alloy engine valves are tougher and lighter than heat-resistant steel engine valves, and it is said that the engine speed can be greatly increased by incorporating them. ing. However, Ti
Since alloy engine valves are expensive, they have been used for engine valves of special cars such as sports cars and racing cars.
【０００３】しかし、近年、自動車を軽量化して燃費を
減少させるべく、通常の自家用車のエンジンバルブにＴ
ｉ合金製エンジンバルブを採用する試みもなされてい
る。このＴｉ合金製エンジンバルブに使用されるＴｉ合
金は、重量％で、Ｔｉ−６％Ａｌ−４％Ｖ合金、Ｔｉ−
６％Ａｌ−２％Ｓｎ−４％Ｚｒ−２％Ｍｏ−０．１％Ｓ
ｎ合金、Ｔｉ−６％Ａｌ−２％Ｓｎ−４％Ｚｒ−２％Ｍ
ｏ合金、Ｔｉ−６％Ａｌ−６％Ｖ−２％Ｓｎ合金、Ｔｉ
−３３．３％Ａｌ−２．７％Ｃｒ−４．８％Ｎｂ合金な
どが知られており、これらＴｉ合金を真空溶解したの
ち、Ｔｉ合金溶湯を金型に遠心鋳造してＴｉ合金製エン
ジンバルブ鋳物を製造する。However, in recent years, in order to reduce the weight of automobiles and reduce fuel consumption, engine valves for ordinary private cars have been designed with T
Attempts have also been made to adopt i-alloy engine valves. The Ti alloy used for the engine valve made of this Ti alloy is, in weight%, Ti-6% Al-4% V alloy, Ti-
6% Al-2% Sn-4% Zr-2% Mo-0.1% S
n alloy, Ti-6% Al-2% Sn-4% Zr-2% M
o alloy, Ti-6% Al-6% V-2% Sn alloy, Ti
-33.3% Al-2.7% Cr-4.8% Nb alloys and the like are known. After these Ti alloys are vacuum melted, a Ti alloy molten metal is centrifugally cast into a mold to make a Ti alloy engine. Manufacture valve castings.
【０００４】得られたＴｉ合金製エンジンバルブ鋳物
は、鋳物内部に発生した微小な巣をつぶすためのＨＩＰ
処理または歪除去のための熱処理が施される。The obtained Ti alloy engine valve casting is a HIP for crushing minute cavities generated inside the casting.
A heat treatment for treatment or strain removal is performed.
【０００５】例えば、Ｔｉ合金製エンジンバルブ鋳物の
ＨＩＰ処理は、図３に示されるように、Ｔｉ合金製エン
ジンバルブ鋳物１を容器２内にステム部３を上に向けて
装入し、Ａｒガス雰囲気中、温度：１３００℃、圧力：
２０００kgｆ／cm2 で所定時間保持して行う。For example, in the HIP treatment of a Ti alloy engine valve casting, as shown in FIG. 3, a Ti alloy engine valve casting 1 is placed in a container 2 with the stem portion 3 facing upward, and Ar gas is introduced. In the atmosphere, temperature: 1300 ° C, pressure:
It is carried out by holding at 2000 kgf / cm 2 for a predetermined time.
【０００６】また、Ｔｉ合金製エンジンバルブ鋳物の熱
処理は大気中、温度：１３００℃にＴｉ合金製エンジン
バルブ鋳物をステム部を上に向けて立てた状態に保持し
て行なう。ＨＩＰ処理または熱処理したＴｉ合金製エン
ジンバルブ鋳物は、必要に応じて表面研削または研摩さ
れてＴｉ合金製エンジンバルブを作製する。Further, the heat treatment of the Ti alloy engine valve casting is carried out in the atmosphere at a temperature of 1300 ° C. while keeping the Ti alloy engine valve casting standing with the stem portion facing upward. The HIP-treated or heat-treated Ti alloy engine valve casting is subjected to surface grinding or polishing as necessary to produce a Ti alloy engine valve.
【０００７】[0007]
【発明が解決しようとする課題】上述のように、遠心鋳
造して得られたＴｉ合金製エンジンバルブ鋳物は、ＨＩ
Ｐ処理または熱処理が施されるが、上記ＨＩＰ処理また
は熱処理中にＴｉ合金製エンジンバルブ鋳物１は、図４
に示されるように、ステム部３とヘッド部４の付け根部
５からステム部３が傾斜するように変形し、かかる変形
の生じたＴｉ合金製エンジンバルブ鋳物１′のステム部
３をヘッド部４に対して直角に矯正することは困難であ
る。したがって、図４に示されるように変形したＴｉ合
金製エンジンバルブ鋳物１′は不良品として廃棄処分さ
れ、エンジンバルブの歩留りが低下する。上記Ｔｉ合金
製エンジンバルブ鋳物の変形はヘッド部を台の開口（図
示せず）に支持してステム部を下方に向けてぶらさげた
状態でＨＩＰ処理または熱処理を行っても発生するとこ
ろから、Ｔｉ合金製エンジンバルブ鋳物の巣などの鋳造
欠陥が付け根部に主として発生することによるものと考
えられるが明らかではない。As described above, the Ti alloy engine valve casting obtained by centrifugal casting is HI
P treatment or heat treatment is performed, but during the above HIP treatment or heat treatment, the Ti alloy engine valve casting 1 is
As shown in FIG. 3, the stem portion 3 and the base portion 5 of the head portion 4 are deformed so that the stem portion 3 is inclined, and the stem portion 3 of the Ti alloy engine valve casting 1 ′ in which such deformation occurs is attached to the head portion 4. It is difficult to correct it at right angles to. Therefore, the Ti alloy engine valve casting 1'which is deformed as shown in FIG. 4 is discarded as a defective product, and the yield of the engine valve is reduced. Deformation of the Ti alloy engine valve casting occurs even if HIP treatment or heat treatment is performed with the head portion supported by the opening (not shown) of the base and the stem portion hung downward. It is thought that this is because casting defects such as alloy engine valve casting cavities mainly occur at the root portion, but it is not clear.
【０００８】[0008]
【課題を解決するための手段】そこで、本発明者等は、
ＨＩＰ処理または熱処理中にＴｉ合金製エンジンバルブ
鋳物が変形するのを防止すべく研究を行った結果、図１
に示されるような少なくともステム部３とヘッド部４の
付け根部５に、少なくとも１個のリブ６の付いたＴｉ合
金製エンジンバルブ鋳物中間体１０を作製し、このリブ
６の付いたＴｉ合金製エンジンバルブ中間体１０にＨＩ
Ｐ処理または熱処理を施すと、付け根部５からの変形は
全く発生せず、ＨＩＰ処理または熱処理後のＴｉ合金製
エンジンバルブ中間体１０のリブ６を除去することによ
り不良品を全く生ずることなくＴｉ合金製エンジンバル
ブを製造することができるという知見を得たのである。Means for Solving the Problems Accordingly, the present inventors have
As a result of research to prevent the Ti alloy engine valve casting from being deformed during HIP treatment or heat treatment, as shown in FIG.
As shown in Fig. 3, a Ti alloy engine valve casting intermediate 10 having at least one rib 6 is produced on at least the stem portion 3 and the root portion 5 of the head portion 4, and the Ti alloy engine valve casting intermediate body 10 having the rib 6 is produced. HI on the engine valve intermediate 10
When P treatment or heat treatment is applied, no deformation from the root portion 5 occurs at all, and by removing the rib 6 of the Ti alloy engine valve intermediate 10 after the HIP treatment or heat treatment, no defective product is produced and Ti We have obtained the knowledge that alloy engine valves can be manufactured.
【０００９】この発明は、かかる知見に基いてなされた
ものであって、少なくともステム部３とヘッド部４の付
け根部５に少なくとも１個のリブを設けたＴｉ合金製エ
ンジンバルブ鋳物中間体をＨＩＰ処理または熱処理した
のち、上記リブを削除するＴｉ合金製エンジンバルブの
製造法に特徴を有するものである。The present invention was made on the basis of the above findings, and HIPs a Ti alloy engine valve casting intermediate body in which at least one rib is provided in at least the root portion 5 of the stem portion 3 and the head portion 4. It is characterized by a method of manufacturing a Ti alloy engine valve in which the rib is removed after the treatment or heat treatment.
【００１０】この発明のＴｉ合金製エンジンバルブの製
造法で用いるＴｉ合金製エンジンバルブ中間体に設けら
れたリブ６は付け根部５のみにステム部の軸方向に平行
に１個設けられていれば十分であるが、複数個のリブを
等間隔に設ける方が一層好ましい。If only one rib 6 provided on the Ti alloy engine valve intermediate used in the method for manufacturing a Ti alloy engine valve of the present invention is provided only in the base portion 5 in parallel to the axial direction of the stem portion. Although sufficient, it is more preferable to provide a plurality of ribs at equal intervals.
【００１１】上記リブ６は、図１に示されるように、ス
テム部３の長さ方向に沿って一部設ければ十分である
が、リブ６を図２に示されるようにステム部３の全長に
亘って設けてもよい。As shown in FIG. 1, it is sufficient for the rib 6 to be partially provided along the lengthwise direction of the stem portion 3. However, the rib 6 of the stem portion 3 is provided as shown in FIG. It may be provided over the entire length.
【００１２】[0012]
実施例１ 直径：９mm、長さ：１２５mmのステム部および外径：４
２mmのヘッド部を有し、ステム部から付け根部を通って
ヘッド部に至る幅：３mm、高さ：３mmの寸法を有するリ
ブを等間隔に３個設けたＴｉ−３４．２Ａｌからなる組
成のＴｉ合金製エンジンバルブ鋳物中間体を１０個作製
し、これらＴｉ合金製エンジンバルブ鋳物中間体を容器
内にステム部が上を向くように並べて装入し、Ａｒガス
雰囲気中、温度：１３００℃、圧力：２０００kgｆ／cm
2 で３．５時間保持の条件のＨＩＰ処理を行ったが、ス
テム部が傾斜する変形は全く生じなかった。Example 1 Stem part having a diameter of 9 mm and a length of 125 mm and an outer diameter of 4
A composition of Ti-34.2Al having a head portion of 2 mm, and three ribs having a width of 3 mm and a height of 3 mm from the stem portion to the head portion through the base portion are provided at equal intervals. Ten Ti alloy engine valve casting intermediates were produced, and these Ti alloy engine valve casting intermediates were loaded side by side in a container so that the stem portions face upward. In an Ar gas atmosphere, temperature: 1300 ° C. Pressure: 2000kgf / cm
When the HIP treatment was performed under the condition of 2 for 3.5 hours, the stem portion was not deformed at all.
【００１３】従来例１ ステム部およびヘッド部の寸法並びに合金の成分組成が
実施例１と全く同じリブのないＴｉ合金製エンジンバル
ブ鋳物を１０個作製し、これらを実施例１と全く同様に
容器内に並べたのち、実施例１と同一条件のＨＩＰ処理
を行ったところ、ＨＩＰ処理されたＴｉ合金製エンジン
バルブ鋳物１０個の内９個にステム部が傾斜する変形が
生じた。Conventional Example 1 Ten ribless engine valve castings made of Ti alloy having the same stem and head dimensions and alloy composition as those of Example 1 were prepared. When the HIP treatment was performed under the same conditions as in Example 1 after arranging them inside, the stem part was inclined and deformed in 9 out of 10 HIP-treated Ti alloy engine valve castings.
【００１４】実施例２ 実施例１で用意したＴｉ合金製エンジンバルブ鋳物中間
体１０個を大気中、温度：１３００℃、３．５時間保持
の熱処理を行ったが、ステム部が傾斜する変形は全く生
じなかった。Example 2 Ten Ti alloy engine valve casting intermediates prepared in Example 1 were heat-treated in the atmosphere at a temperature of 1300 ° C. for 3.5 hours. It didn't happen at all.
【００１５】従来例２ 従来例１で用意したリブのないＴｉ合金製エンジンバル
ブ鋳物１０個を実施例２と同じ条件の熱処理を行ったと
ころ、熱処理したＴｉ合金製エンジンバルブ鋳物１０個
の内３個にステム部が傾斜する変形が生じた。Conventional Example 2 Ten rib-free Ti alloy engine valve castings prepared in Conventional Example 1 were heat-treated under the same conditions as in Example 2, and three of the 10 heat-treated Ti alloy engine valve castings were used. The stem was deformed so that the stem part was inclined.
【図１】この発明のＴｉ合金製エンジンバルブの製造法
で使用するＴｉ合金製エンジンバルブ鋳物中間体の斜視
図である。FIG. 1 is a perspective view of a Ti alloy engine valve casting intermediate used in a method for manufacturing a Ti alloy engine valve of the present invention.
【図２】この発明のＴｉ合金製エンジンバルブの製造法
で使用するＴｉ合金製エンジンバルブ鋳物中間体の斜視
図である。FIG. 2 is a perspective view of a Ti alloy engine valve casting intermediate used in the method for manufacturing a Ti alloy engine valve of the present invention.
【図３】従来のＴｉ合金製エンジンバルブ鋳物のＨＩＰ
処理方法を説明するための説明図である。FIG. 3 HIP of a conventional Ti alloy engine valve casting
It is explanatory drawing for demonstrating a processing method.
【図４】従来のＴｉ合金製エンジンバルブ鋳物をＨＩＰ
処理した場合に生じる変形の説明図である。FIG. 4 HIP of a conventional Ti alloy engine valve casting
It is explanatory drawing of the deformation | transformation which arises when it processes.
１ Ｔｉ合金製エンジンバルブ鋳物 ２ 容器 ３ ステム部 ４ ヘッド部 ５ 付け根部 ６ リブ １０ Ｔｉ合金製エンジンバルブ鋳物中間体 １′ 変形したＴｉ合金製エンジンバルブ鋳物 DESCRIPTION OF SYMBOLS 1 Ti alloy engine valve casting 2 Container 3 Stem portion 4 Head portion 5 Base portion 6 Rib 10 Ti alloy engine valve casting intermediate 1 'Deformed Ti alloy engine valve casting
Claims (2)
部に少なくとも１個のリブを設けたＴｉ合金製エンジン
バルブ鋳物中間体をＨＩＰ処理または熱処理したのち、
上記リブを削除することを特徴とするＴｉ合金製エンジ
ンバルブの製造法。1. A Ti alloy engine valve casting intermediate having at least one rib provided at least at the base of a stem and a head is subjected to HIP treatment or heat treatment,
A method for manufacturing a Ti alloy engine valve, characterized in that the ribs are removed.
から付け根部を通ってヘッド部に至るように設けられて
いることを特徴とする請求項１記載のＴｉ合金製エンジ
ンバルブの製造法。2. The method for manufacturing a Ti alloy engine valve according to claim 1, wherein the at least one rib is provided so as to extend from the stem portion to the head portion through the root portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23920695A JP3158990B2 (en) | 1995-08-24 | 1995-08-24 | Manufacturing method of Ti alloy engine valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23920695A JP3158990B2 (en) | 1995-08-24 | 1995-08-24 | Manufacturing method of Ti alloy engine valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0960510A true JPH0960510A (en) | 1997-03-04 |
| JP3158990B2 JP3158990B2 (en) | 2001-04-23 |
Family
ID=17041321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23920695A Expired - Fee Related JP3158990B2 (en) | 1995-08-24 | 1995-08-24 | Manufacturing method of Ti alloy engine valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3158990B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006017412A (en) * | 2004-07-02 | 2006-01-19 | Kuroki Kogyosho:Kk | Method for charging lost wax casting into hip device |
-
1995
- 1995-08-24 JP JP23920695A patent/JP3158990B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006017412A (en) * | 2004-07-02 | 2006-01-19 | Kuroki Kogyosho:Kk | Method for charging lost wax casting into hip device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3158990B2 (en) | 2001-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111225990B (en) | Method for producing a nickel-base alloy | |
| JP3786452B2 (en) | Method for thermomechanically treating a product formed of an approximate gamma titanium aluminide alloy | |
| CA2597248C (en) | Method for casting titanium alloy | |
| JPH10195564A (en) | High strengh nickel superalloy article having machined surface | |
| JP4035664B2 (en) | Simple manufacturing method and apparatus for heat-treatable aluminum alloy castings | |
| US7797832B2 (en) | Cast aluminum wheel manufacturing and products | |
| JPH0960510A (en) | Manufacture of engine valve made of titanium alloy | |
| JP3608546B2 (en) | Mold for casting and manufacturing method thereof | |
| KR970014875A (en) | METHOD FOR MANUFACTURING MOISTURE MATERIAL FOR COPY ALLOY FOR STEEL STEEL CASTING AND METHOD THEREOF | |
| US20090159161A1 (en) | METHOD FOR FABRICATING A THICK Ti64 ALLOY ARTICLE TO HAVE A HIGHER SURFACE YIELD AND TENSILE STRENGTHS AND A LOWER CENTERLINE YIELD AND TENSILE STRENGTHS | |
| US20060225818A1 (en) | Process for casting a beta-titanium alloy | |
| JPS647140B2 (en) | ||
| JPH032359A (en) | Production of flanged cylindrical member | |
| US4810312A (en) | Treatment of superalloy surfaces | |
| CN112317705B (en) | Ingot mold, smelting system and production method of large-ingot-shaped alloy ingot | |
| Lane | Investment-Cast Superalloys Challenge Wrought Materials | |
| JP2003191054A (en) | METHOD FOR PRODUCING Zn-Al BASE ALLOY WIRE ROD FOR THERMAL-SPRAYED COATING | |
| SU407976A1 (en) | ||
| RU2258575C1 (en) | Method of production of difficult to form forging of high-alloy steels and alloys | |
| GB2124939A (en) | Method of hot-forming metals prone to crack during rolling | |
| US1547931A (en) | Production of ingots and other metal castings | |
| JPH02295628A (en) | Production of forging | |
| JPH08155062A (en) | Production of hollow club head made of titanium alloy for golf club | |
| SU1752825A1 (en) | Method of heat treatment of semi-products | |
| Stinson et al. | Improvement of HCF properties in Ti-6 Al-4 V castings via thermochemical treatment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20010116 |
|
| LAPS | Cancellation because of no payment of annual fees |