JPH01259128A - Production of exhaust valve - Google Patents
Production of exhaust valveInfo
- Publication number
- JPH01259128A JPH01259128A JP63084582A JP8458288A JPH01259128A JP H01259128 A JPH01259128 A JP H01259128A JP 63084582 A JP63084582 A JP 63084582A JP 8458288 A JP8458288 A JP 8458288A JP H01259128 A JPH01259128 A JP H01259128A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust valve
- bevel
- resisting steel
- heat resisting
- laser beam
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 229910000734 martensite Inorganic materials 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 7
- 239000002344 surface layer Substances 0.000 abstract description 6
- 239000010410 layer Substances 0.000 abstract 1
- 241000270281 Coluber constrictor Species 0.000 description 7
- OQZCSNDVOWYALR-UHFFFAOYSA-N flurochloridone Chemical compound FC(F)(F)C1=CC=CC(N2C(C(Cl)C(CCl)C2)=O)=C1 OQZCSNDVOWYALR-UHFFFAOYSA-N 0.000 description 7
- 238000010791 quenching Methods 0.000 description 6
- 230000000171 quenching effect Effects 0.000 description 6
- 238000003466 welding Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Laser Beam Processing (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はエンジンの排気バルブの製造方法に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a method of manufacturing an exhaust valve for an engine.
例えばディーゼルエンジンの排気バルブでは、その傘部
２は軸部３よりも苛酷な化学的雰囲気で熱負荷に曝され
る関係上、一般に第２図側面図に示すように、オーステ
ナイト系耐熱鋼で作られた傘部２とマルテンサイト系耐
熱鋼で作られた軸部３とを溶接部４にて突合溶接するこ
とにより作られ、その熱処理は軸部のマルテンサイト系
耐熱鋼の特性に合わせて全体的に１０５０℃程度にて焼
入れられ７００゜〜８００℃に焼戻されている。For example, in the exhaust valve of a diesel engine, the cap part 2 is exposed to a heat load in a harsher chemical atmosphere than the shaft part 3, so it is generally made of austenitic heat-resistant steel, as shown in the side view of Figure 2. It is made by butt welding the umbrella part 2 made of the heat-resistant martensitic steel and the shaft part 3 made of martensitic heat-resistant steel at the welding part 4. Generally, it is hardened at about 1050°C and tempered to 700° to 800°C.
これは、傘部のオーステナイト系耐熱鋼の冶金学的特性
に合わせてバルブ全体を熱処理すると、軸部の金属組織
の変化によりその強度及び靭性が低下することによる。This is because if the entire bulb is heat-treated to match the metallurgical properties of the austenitic heat-resistant steel of the cap, the strength and toughness of the shaft decrease due to changes in the metal structure of the shaft.
しかしながら、この種の排気バルブの傘部はオーステナ
イト系耐熱鋼である関係上、その固溶化熱処理は１１０
０〜１２００℃程度で行われることがその耐蝕性を十分
発揮するために望ましく、この点従来の焼入れ温度では
高価な材質にもか＼わらずその耐蝕性が十分発揮される
には至っていない。However, since the head portion of this type of exhaust valve is made of austenitic heat-resistant steel, the solution heat treatment is 110%.
It is desirable to perform the quenching at a temperature of about 0 to 1200° C. in order to fully exhibit its corrosion resistance, and in this respect, conventional quenching temperatures do not allow the corrosion resistance to be fully exhibited despite the use of expensive materials.
そこで、傘部を高周波焼入れすることも一応考えられる
のであるが、加熱にかなり時間がか５す、また熱変形が
生ずるという問題がある。Therefore, induction hardening of the umbrella part may be considered, but there are problems in that heating takes a considerable amount of time and thermal deformation occurs.
本発明はこのような事情に鑑みて提案されたもので、熱
変形を伴うことなく迅速に表面層のみを加熱してオース
テナイト耐熱鋼の耐熱性及び耐蝕性を十分に発揮する長
寿命の排気バルブの製造方法を提供することを目的とす
る。The present invention was proposed in view of these circumstances, and provides a long-life exhaust valve that quickly heats only the surface layer without thermal deformation and fully demonstrates the heat resistance and corrosion resistance of austenitic heat-resistant steel. The purpose is to provide a manufacturing method for.
そのために本発明は、オーステナイト系耐熱鋼よりなる
傘部とマルテンサイト系耐熱鋼よりなる軸部とを突合わ
せ溶接したのち上記軸部の冶金学的特性に合わせて全体
を熱処理する排気バルブの製作方法において、上記熱処
理後、上記バルブをその中心軸線の周りに適宜回転速度
で回転する吉−もにこれを軸方向に移動し、その間レー
ザビームの方向を相対的に変えながらこれを上記外表面
に法線方向に当てることによりその外表面を全体的に焼
入れすることを特徴とする。To this end, the present invention aims to produce an exhaust valve in which a cap made of austenitic heat-resistant steel and a shaft made of martensitic heat-resistant steel are butt welded together, and then the whole is heat-treated in accordance with the metallurgical characteristics of the shaft. In the method, after the heat treatment, the bulb is rotated around its central axis at an appropriate rotational speed, and then moved in the axial direction, while the direction of the laser beam is relatively changed while the bulb is rotated around its central axis at an appropriate rotational speed. It is characterized by hardening the entire outer surface by applying it in the normal direction to.
このような構成により、傘部の軸側の硫酸アタックを受
ける上表面のみをレーサービームにより順次連続的に熱
変形を伴うことなく迅速に表面層のみを加熱してオース
テナイト耐熱鋼の耐熱性及び耐蝕性を十分に発揮する長
寿命の排気バルブの製造方法を得ることができる。With this structure, only the upper surface of the shaft side of the umbrella part that is attacked by sulfuric acid is heated sequentially and continuously by the racer beam, and only the surface layer is rapidly heated without thermal deformation, thereby improving the heat resistance and corrosion resistance of austenitic heat-resistant steel. Therefore, it is possible to obtain a method for manufacturing an exhaust valve that has a long life and fully exhibits its properties.
本発明の一実施例を図面について説明すると、第１図は
その斜視図である。An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view thereof.
上図において、第２図と同一の符番はそれぞれ同図と同
一の部材を示し、５はレーザー光源、６はレーサービー
ムである。In the above figure, the same reference numerals as in FIG. 2 indicate the same members as in the same figure, 5 is a laser light source, and 6 is a laser beam.
このような配置において、排気バルブ】及びレーサー光
源５は始めそれぞれ実線で示す関係位置にあり、排気バ
ルブ１の傘部２の低勾配部ａ部にレーサービーム６のス
ポットが法線方向に当てられると＼もに、排気バルブ１
は図示せざる手段により、その中心軸線の周りに一定速
度で回転しながら一定速度で破線に示す位置まで軸方向
下方に送られ、その間、レーザー光源５は実線位置から
破線位置へ図示せざる手段により回動する。In such an arrangement, the exhaust valve 1 and the racer light source 5 are initially in the relative positions shown by solid lines, and the spot of the racer beam 6 is applied to the low slope part a of the umbrella part 2 of the exhaust valve 1 in the normal direction. To\moni, exhaust valve 1
is sent axially downward at a constant speed to the position shown by the broken line while rotating around its central axis at a constant speed by a means (not shown), while the laser light source 5 is moved from the solid line position to the broken line position by the unillustrated means (not shown). It rotates by.
そうすると、始め傘部２の低勾配部ａが、次に急勾配部
すが順次レーザービーム６の照射を受けて、その際、レ
ーサースポットが当った部分は瞬時にその表面層のみが
加熱されたのちすぐ空冷される結果、焼入られ、傘部及
びレーサー光源が破線位置に達したときは、傘部の上表
面は全面的に焼入れが終わる。Then, first the low slope part a of the umbrella part 2 and then the steep slope part were irradiated with the laser beam 6, and at that time, only the surface layer of the part hit by the racer spot was instantly heated. As a result of being immediately air cooled, the cap section is hardened, and when the cap section and the racer light source reach the dotted line position, the entire upper surface of the cap section is completely hardened.
以上の焼入れの際、焼入れはレーザースポットに照射さ
れた小部分の表層部のみに行われるので、全体的に熱変
形は生ぜず、傘部土面は効率的にその耐食性が、オース
テナイト耐熱鋼の冶金学的特性に一致するまで向上する
。During the above quenching process, the quenching is carried out only on the surface layer of the small area irradiated by the laser spot, so no thermal deformation occurs as a whole, and the corrosion resistance of the soil surface of the umbrella part is effectively improved compared to that of austenitic heat-resistant steel. Improved to match metallurgical properties.
要するに本発明によれば、オーステナイト系耐熱鋼より
なる傘部とマルテンサイト系耐熱鋼よりなる軸部とを突
合わせ溶接したのち上記軸部の冶金学的特性に合わせて
全体を熱処理する排気バルブの製作方法において、上記
熱処理後、上記バルブをその中心軸線の周りに適宜回転
速度で回転すると＼もにこれを軸方向に移動し、その間
レーサービームの方向を相対的に変えながらこれを上記
外表面に法線方向に当てることによりその外表面を全体
的に焼入れすることにより、熱変形を伴うことなく迅速
に表面層のみを加熱してオーステナイト耐熱鋼の耐熱性
及び耐食性を十分に発揮する長寿命の排気バルブの製造
方法を得るから、本発明は産業上極めて有益なものであ
る。In short, according to the present invention, an exhaust valve is provided in which a cap made of austenitic heat-resistant steel and a shaft made of martensitic heat-resistant steel are butt welded, and then the whole is heat-treated in accordance with the metallurgical characteristics of the shaft. In the manufacturing method, after the heat treatment, the bulb is rotated around its central axis at an appropriate rotational speed to move it in the axial direction, and while the direction of the laser beam is relatively changed, it is moved to the outer surface. By quenching the entire outer surface of the steel in the normal direction, only the surface layer is rapidly heated without thermal deformation, resulting in a long life that fully demonstrates the heat resistance and corrosion resistance of austenitic heat-resistant steel. The present invention is industrially extremely useful because it provides a method for manufacturing an exhaust valve.
第１図は本発明の一実施例の焼入れ要領を示す配置図、
第２図は公知のデイ−セルエンジンの排気バルブを示す
側面図である。
１・・排気バルブ、２・・傘部、３・・軸部、４・・溶
接部、５・・レーサー光源、６・・レーサービーム、
ａ・・低勾配部、 ｂ・・急勾配部代理人 弁理士
塚 本 正 文FIG. 1 is a layout diagram showing the quenching procedure of an embodiment of the present invention;
FIG. 2 is a side view showing an exhaust valve of a known day cell engine. 1. Exhaust valve, 2. Umbrella section, 3. Shaft section, 4. Welding section, 5. Racer light source, 6. Racer beam, a.. Low slope section, b.. Steep slope section substitute. People Patent Attorney Masafumi Tsukamoto
Claims (1)
たのち上記軸部の冶金学的特性に合わせて全体を熱処理
する排気バルブの製作方法において、上記熱処理後、上
記バルブをその中心軸線の周りに適宜回転速度で回転す
るとゝもにこれを軸方向に移動し、その間レーザビーム
の方向を相対的に変えながらこれを上記外表面に法線方
向に当てることによりその外表面を全体的に焼入れする
ことを特徴とする排気バルブの製造方法。[Scope of Claims] Manufacture of an exhaust valve in which a cap made of austenitic heat-resistant steel and a shaft made of martensitic heat-resistant steel are butt welded, and then the whole is heat-treated to match the metallurgical characteristics of the shaft. In the method, after the heat treatment, the bulb is rotated around its central axis at an appropriate rotational speed and moved in the axial direction, while the direction of the laser beam is relatively changed while applying it to the outer surface. A method for manufacturing an exhaust valve, characterized in that the entire outer surface of the exhaust valve is hardened by applying it in the normal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63084582A JPH0653893B2 (en) | 1988-04-06 | 1988-04-06 | Exhaust valve manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63084582A JPH0653893B2 (en) | 1988-04-06 | 1988-04-06 | Exhaust valve manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01259128A true JPH01259128A (en) | 1989-10-16 |
| JPH0653893B2 JPH0653893B2 (en) | 1994-07-20 |
Family
ID=13834671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63084582A Expired - Lifetime JPH0653893B2 (en) | 1988-04-06 | 1988-04-06 | Exhaust valve manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0653893B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0801214A1 (en) * | 1996-03-14 | 1997-10-15 | Fuji Oozx Inc. | Poppet valve and method of manufacturing it |
| CN102199698A (en) * | 2010-03-25 | 2011-09-28 | 中国科学院力学研究所 | Laser reinforcing process for valve seat of cylinder head |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109628725B (en) * | 2019-01-31 | 2020-06-23 | 磐石市星环阀片有限公司 | High-strength automobile valve plate heat treatment equipment and machining method thereof |
-
1988
- 1988-04-06 JP JP63084582A patent/JPH0653893B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0801214A1 (en) * | 1996-03-14 | 1997-10-15 | Fuji Oozx Inc. | Poppet valve and method of manufacturing it |
| US5799683A (en) * | 1996-03-14 | 1998-09-01 | Fuji Oozx Inc. | Poppet valve and method of manufacturing it |
| CN102199698A (en) * | 2010-03-25 | 2011-09-28 | 中国科学院力学研究所 | Laser reinforcing process for valve seat of cylinder head |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0653893B2 (en) | 1994-07-20 |
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