JPH01205026A - Method for improving pitting resistance of steel-made member - Google Patents
Method for improving pitting resistance of steel-made memberInfo
- Publication number
- JPH01205026A JPH01205026A JP2954688A JP2954688A JPH01205026A JP H01205026 A JPH01205026 A JP H01205026A JP 2954688 A JP2954688 A JP 2954688A JP 2954688 A JP2954688 A JP 2954688A JP H01205026 A JPH01205026 A JP H01205026A
- Authority
- JP
- Japan
- Prior art keywords
- gear
- shot
- steel
- quenching
- prescribed
- 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
- 238000000034 method Methods 0.000 title claims description 17
- 238000005480 shot peening Methods 0.000 claims abstract description 26
- 239000002245 particle Substances 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 28
- 239000010959 steel Substances 0.000 claims description 28
- 238000005496 tempering Methods 0.000 abstract description 18
- 239000002344 surface layer Substances 0.000 abstract description 16
- 238000010438 heat treatment Methods 0.000 abstract description 15
- 238000010791 quenching Methods 0.000 abstract description 10
- 230000000171 quenching effect Effects 0.000 abstract description 9
- 238000005256 carbonitriding Methods 0.000 abstract description 4
- 238000005255 carburizing Methods 0.000 abstract description 4
- 238000007664 blowing Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 7
- 238000005452 bending Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 6
- 230000035882 stress Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000003679 aging effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Landscapes
- Heat Treatment Of Articles (AREA)
- 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、鋼製部材の耐ピッチング性向上方法の改良に
関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a method for improving pitting resistance of steel members.
（従来の技術）
従来より、例えば自動車等車両のトランスミッションに
用いられるミッションギヤ等には高負荷が作用すること
から、曲げ疲労強度に加えて面疲労強度いわゆるピッチ
ング強度の向上が要求される。特に、エンジンの高出力
化が叫ばれている昨今においてはなおさらのことである
。そして、このような曲げ疲労強度およびピッチング強
度を向上させる方法として、例えば特開昭６０−２１８
４２３号公報に開示されているように、鋼製部材を浸炭
焼入れしたのち焼戻しし、次いで、この焼戻し後の鋼製
部材に対しショットピーニングを施した後、上記焼戻し
時における焼戻し温度よりも低い温度で熱処理（いわゆ
る低温焼戻し）を施すことにより、上記ショットピーニ
ングにより高加工度を受けた鋼製部材表面層の靭性の回
復を図る方法が知られている。(Prior Art) Conventionally, since high loads are applied to mission gears used in transmissions of vehicles such as automobiles, it has been required to improve surface fatigue strength, so-called pitching strength, in addition to bending fatigue strength. This is especially true in these days when there is a demand for higher engine output. As a method for improving such bending fatigue strength and pitting strength, for example, Japanese Patent Application Laid-Open No. 60-218
As disclosed in Publication No. 423, a steel member is carburized and quenched, then tempered, and then shot peened is applied to the tempered steel member at a temperature lower than the tempering temperature during the above-mentioned tempering. There is a known method for restoring the toughness of the surface layer of a steel member that has been subjected to a high degree of working by shot peening, by performing heat treatment (so-called low-temperature tempering).
（発明が解決しようとする課題）
ところが、上記の公報例のやり方では、焼戻しされた鋼
製部材をショットピーニングした後、低温度焼戻しを行
っていることから、所期の目的である曲げ疲労強度の確
保およびピッチング強度の向上を図るには上記の段階を
踏まなければならず、量産する観点より製作効率の向上
を図ることが望まれる。(Problem to be Solved by the Invention) However, in the method disclosed in the above-mentioned publication example, the tempered steel member is shot peened and then low-temperature tempered. In order to ensure this and improve pitching strength, the above steps must be taken, and from the perspective of mass production, it is desirable to improve manufacturing efficiency.
本発明はかかる点に鑑みてなされたものであり、その目
的とするところは、焼戻し後の鋼製部材に対しショット
ピーニングを施す際に適切な手段を講することにより、
ショットピーニング時に、ショットピーニングにより高
加工度を受けた鋼製部材表面層の靭性の回復を図って高
面圧・高すべり率負荷の下での表面亀裂感受性を低下せ
しめ得、これにより曲げ疲労強度を確保しつつピッチン
グ強度の向上を図り、耐ピッチング性の優れた鋼製部材
を効率よく得んとすることにある。The present invention has been made in view of these points, and its purpose is to take appropriate measures when subjecting steel members after tempering to shot peening.
During shot peening, shot peening can restore the toughness of the surface layer of steel parts that have been subjected to high working conditions, reducing surface crack susceptibility under high surface pressure and high slip rate loads, thereby improving bending fatigue strength. The object of the present invention is to efficiently obtain a steel member having excellent pitting resistance by improving pitching strength while ensuring the following properties.
（課題を解決するための手段）
上記の目的を達成するため、本発明の解決手段は、まず
、鋼製部材を浸炭焼入れもしくは浸炭窒化焼入れしたの
ち焼戻しする。次いで、この焼戻し後の鋼製部材に対し
ショット粒子を加熱エアと共にエアノズル方式により噴
出させることにより、鋼製部材を１００〜２００℃に加
熱した状態でショットピーニングするようにする。(Means for Solving the Problems) In order to achieve the above object, the solving means of the present invention first subjects a steel member to carburizing and quenching or carbonitriding and quenching, and then tempers it. Next, shot peening is performed on the tempered steel member while the steel member is heated to 100 to 200° C. by jetting shot particles together with heated air using an air nozzle method.
（作用）
上記の構成により、本発明方法では、鋼製部材は、浸炭
焼入れもしくは浸炭窒化焼入れ後に焼戻しされ、その後
、エアノズル方式により噴出される加熱エアにより１０
０〜２００℃に加熱された状態で、該加熱エアと共に噴
出されるショット粒子によりショットピーニングされる
。このことから、ショットピーニング時、ショットピー
ニングにより高加工度を受けた鋼製部材表面層が上記加
熱エアによって加熱されて該表面層の靭性の回復が図ら
れ、これにより高面圧・高すべり率負荷の下での表面亀
裂感受性が低下せしめられて曲げ疲労強度を確保しつつ
ピッチング強度の向上が図られ、よって耐ピッチング性
の優れた鋼製部材が効率よく得られることとなる。(Function) With the above configuration, in the method of the present invention, the steel member is tempered after carburizing and quenching or carbonitriding, and then heated for 10 minutes by heating air jetted by an air nozzle method.
Shot peening is performed by shot particles ejected together with the heated air while being heated to 0 to 200°C. Therefore, during shot peening, the surface layer of the steel member that has been highly worked by shot peening is heated by the heated air, and the toughness of the surface layer is restored, resulting in high surface pressure and high slip rate. Susceptibility to surface cracking under load is reduced, and pitching strength is improved while ensuring bending fatigue strength, and thus a steel member with excellent pitting resistance can be efficiently obtained.
（実施例） 以下、本発明の実施例を図面に基づいて説明する。(Example) Embodiments of the present invention will be described below based on the drawings.
第１図は本発明の実施例に係る鋼製部材耐ピッチング性
向上方法を自動車等車両のトランスミッションに用いら
れるミッションギヤＷに適用した場合を示す。該ミッシ
ョンギヤＷの耐ピッチング性を向上させる要領をその製
造要領と共に説明するに、まず、所定の寸法に切断した
鋼材を焼鈍したのち鍛造し、その後、焼準したのち機械
加工を施して所定形状のミッションギヤＷを得る。FIG. 1 shows a case where a method for improving pitching resistance of a steel member according to an embodiment of the present invention is applied to a mission gear W used in a transmission of a vehicle such as an automobile. To explain the method for improving the pitting resistance of the mission gear W along with its manufacturing method, first, a steel material cut to a predetermined size is annealed and then forged, then normalized and then machined to a predetermined shape. Obtain the mission gear W.
次いで、このミッションギヤＷを所定の焼入れ条件の下
で浸炭焼入れ（９３０℃の温度で３時間保持した後、８
４０℃の温度で０． ５時間保持して焼入れする処理）
もしくは浸炭窒化焼入れしてその表面層を硬化させる。Next, this transmission gear W was carburized and quenched under predetermined quenching conditions (after being held at a temperature of 930°C for 3 hours,
0 at a temperature of 40°C. Process of holding and quenching for 5 hours)
Alternatively, the surface layer is hardened by carbonitriding and quenching.
その後、上記ミッションギヤＷを１７０℃の温度で１．
５時間保持しして空冷する焼戻しを施して熱歪みの除去
および組織のねばり強さを向上させる。After that, the above-mentioned mission gear W was heated to 170°C for 1.
Tempering is performed by holding for 5 hours and cooling in air to remove thermal distortion and improve the toughness of the structure.
しかる後、このミッションギヤＷを上下の固定治具１，
１によって回転テーブル２上に回転一体に固定し、該回
転テーブル２の回転動作により回転させられるミッショ
ンギヤＷに対し、コンプレッサ３で圧搾されサージタン
ク４を経て熱交換器５で１００〜２００℃に加熱された
加熱エアＡをノズル６から所定の圧力で噴出させ、ミッ
ションギヤＷの表面層のみの低温焼戻しを行う。これと
同時に、開閉バルブ７を開作動させ、加圧タンク８内に
収容されたショット粒子Ｂ、 Ｂ、・・・を上記加熱
エアＡの噴出力の作用によって加熱エアＡと共に上記ミ
ッションギヤＷに対しノズル６から所定の圧力で所定時
間だけ噴出させることにより、ミッションギヤＷを１０
０〜２００°Ｃに加熱した状態で、つまり低温焼戻し状
態でショットピーニングする。このように、ミッション
ギヤＷを１００〜２００℃に加熱するのは、１００℃未
満ではショットピーニングにより高加工度を受けたミッ
ションギヤＷ表面層の靭性回復力が低下する一方、２０
０℃を越えるとショットピーニングにより付加されたミ
ッションギヤＷ表面層の圧縮残留応力が減衰し、耐ピッ
チング性が低下することとなるからである。また、加熱
時間は６０〜３００秒が好ましく、６０秒未満では表面
の均一な加熱が得られなく、一方、３００秒を越えると
効果は飽和し経済的でない。After that, attach this mission gear W to the upper and lower fixing jigs 1,
1, the mission gear W is fixed on a rotary table 2 and rotated by the rotary operation of the rotary table 2, and is compressed by a compressor 3, passed through a surge tank 4, and heated to 100 to 200°C by a heat exchanger 5. The heated air A is ejected from the nozzle 6 at a predetermined pressure to perform low-temperature tempering of only the surface layer of the mission gear W. At the same time, the on-off valve 7 is opened, and the shot particles B, B, etc. contained in the pressurized tank 8 are delivered to the mission gear W together with the heated air A by the action of the jetting force of the heated air A. On the other hand, by ejecting from the nozzle 6 at a predetermined pressure for a predetermined time, the mission gear W is
Shot peening is performed in a state heated to 0 to 200°C, that is, in a low temperature tempered state. As described above, heating the mission gear W to 100 to 200°C is because heating the mission gear W to 100 to 200°C is because heating the mission gear W to 100°C to 200°C reduces the toughness recovery force of the surface layer of the mission gear W that has been subjected to high working conditions due to shot peening, while heating the mission gear W to 100°C to 200°C reduces the toughness recovery power of the surface layer of the mission gear W that has undergone high processing by shot peening.
This is because if the temperature exceeds 0° C., the compressive residual stress in the surface layer of the mission gear W added by shot peening will be attenuated, resulting in a decrease in pitting resistance. Further, the heating time is preferably 60 to 300 seconds; if it is less than 60 seconds, uniform heating of the surface cannot be obtained, while if it exceeds 300 seconds, the effect is saturated and it is not economical.
その後、歪取りおよび研磨を行ってミッションギヤＷ製
作作業を終える。Thereafter, distortion removal and polishing are performed to complete the mission gear W manufacturing work.
なお、上記ショットピーニングの好ましい条件としては
、ショット径が０．１〜１．０龍で、０゜１龍未満では
加工度が低く効果不十分であり、−方、ｌ、Ｑｍｍを越
えると表面粗さが劣化する。また、ショット粒硬さはＨ
ＲＣ５０〜５８で、ＨＲＣ５０未満では加工度が低く効
果不十分であり、一方、ＨＲＣ５ｇを越えると効果は飽
和し、またショット粒の破損が大きくなる。エア圧力は
４〜８ｋｇｔ’／ｃｊで、４ｋｇｆ／ｃ−未満では加工
度が低く効果不十分であり、一方、８ｋｇｆ／ｃ−を越
えると効果は飽和し、またショット粒の破損が大きくな
る。さらに、ショット時間は６０〜３００秒で、６０秒
未満ではカバレージ不足で効果が低く、一方、３００秒
を越えると効果が飽和し経済的でない。The preferred conditions for the above shot peening are that the shot diameter is 0.1 to 1.0 mm.If the shot diameter is less than 0.1 mm, the degree of processing is low and the effect is insufficient, and if it exceeds 1 mm, the surface Roughness deteriorates. In addition, the shot grain hardness is H
When the RC is 50 to 58, and the HRC is less than 50, the degree of processing is low and the effect is insufficient.On the other hand, when the HRC exceeds 5 g, the effect is saturated and the shot grains are more likely to be damaged. The air pressure is 4 to 8 kgt'/cj, and if it is less than 4 kgf/c-, the degree of processing is low and the effect is insufficient, while if it exceeds 8 kgf/c-, the effect is saturated and the shot grains are seriously damaged. Further, the shot time is 60 to 300 seconds, and if it is less than 60 seconds, the coverage will be insufficient and the effect will be low, while if it exceeds 300 seconds, the effect will be saturated and it will not be economical.
このように、本実施例では、焼戻し後のミッションギヤ
Ｗに対し加熱エアＡをノズル６から所定の圧力で所定時
間だけ噴出させると同時に、ショット粒子Ｂ、 Ｂ、
・・・を上記加熱エアＡの噴出力の作用によって加熱エ
アＡと共に噴出させることにより、ミッションギヤＷを
１００〜２００’Ｃに加熱した低温焼戻し状態でショッ
トピーニングすることから、ショットピーニングにより
高加工度を受けたミッションギヤＷ表面層の靭性を加熱
エアＡによる低温焼戻しによって回復させ、これにより
高面圧・高すべり重負荷の下での表面亀裂感受性を低下
せしめて曲げ疲労強度を確保しつつピッチング強度の向
上を図り得、よって耐ピッチング性の優れたミッション
ギヤＷを得ることができる。In this way, in this embodiment, the heated air A is ejected from the nozzle 6 at a predetermined pressure for a predetermined time to the tempered mission gear W, and at the same time, shot particles B, B,
... is ejected together with the heated air A by the effect of the ejection force of the heated air A, and the mission gear W is shot peened in a low temperature tempered state heated to 100 to 200'C. The toughness of the surface layer of the mission gear W, which has been damaged by heat, is restored by low-temperature tempering using heated air A, thereby reducing the susceptibility to surface cracks under high surface pressure and heavy sliding loads, while ensuring bending fatigue strength. It is possible to improve the pitching strength, and thus it is possible to obtain a mission gear W having excellent pitching resistance.
この際、低温焼戻しとショットピーニングとを同時に行
うので、上記耐ピッチング性の優れたミッションギヤＷ
を効率よく得ることができる。また、加熱エアによる低
温焼戻しとショットピーニングとを同時に行うため、低
温焼戻しによる時効効果をより促進させることができる
ものである。At this time, low-temperature tempering and shot peening are performed at the same time, so the transmission gear W with excellent pitting resistance is
can be obtained efficiently. Furthermore, since low-temperature tempering using heated air and shot peening are performed simultaneously, the aging effect of low-temperature tempering can be further promoted.
このことを実証するために、鋼材として９０Ｍ４２０Ｈ
（ＪＩＳ規格）を用い、ショットピーニングと加熱エア
Ａによる低温焼戻しとを同時に行った本実施例に係るミ
ッションギヤＷと、同じく鋼材として９０Ｍ４２０Ｈ（
Ｊ Ｉｓ規格）“を用い、ショットピーニング後の低温
焼戻しを行わない比較例に係るミッションギヤＷとの各
々のピッチング耐久テストをし、そのテスト結果を第２
図に示す。なお、このテストデータを得るにあたっての
ショットピーニング条件は、ショット径が０． ６ｍｒ
ｓｓショット粒硬さがＨＲＣ５３〜５５、エア圧力が５
ｋｇｆ／ｃｄ、ショット時間が１５０秒、低温焼戻し条
件は、熱風温度が１８０℃、加熱温度が１５０秒である
。また、各ミッションギヤＷ（モジュール２．５）の回
転条件は、回転数３００Ｏｒｐｍ１回転トルク１７ｋｇ
ｆ’ｍであった。そして、このテストデータから明らか
な如く、口中を付して表わす本実施例では、ピッチング
発生サイクル数（５０％累積確率）が１０．０ＸＩＯ５
となって、○印を付して表わす比較例の３．９Ｘ１０５
に比べて一段と耐ピッチング性が向上していることが判
る。In order to demonstrate this, we used 90M420H as a steel material.
(JIS standard), shot peening and low-temperature tempering using heated air A were performed at the same time.
A pitching durability test was conducted on each mission gear W according to a comparative example in which low-temperature tempering was not performed after shot peening using the JIS standard), and the test results were used in the second test.
As shown in the figure. Note that the shot peening conditions for obtaining this test data were that the shot diameter was 0. 6mr
ss shot grain hardness HRC53-55, air pressure 5
kgf/cd, the shot time is 150 seconds, and the low temperature tempering conditions are a hot air temperature of 180° C. and a heating temperature of 150 seconds. In addition, the rotation conditions for each mission gear W (module 2.5) are rotation speed 300 Orpm and 1 rotation torque 17 kg.
It was f'm. As is clear from this test data, in this example, which is expressed by adding the inside of the mouth, the number of pitching occurrence cycles (50% cumulative probability) is 10.0XIO5
Therefore, 3.9X105 of the comparative example shown with a circle
It can be seen that the pitting resistance is much improved compared to the above.
また、第３図はショットピーニングにより付加されたミ
ッションギヤＷ表面層（表面下５０μｍ深さ）の圧縮残
留応力のテストデータを示し、口中を付して表わす本実
施例の方がＯ印を付して表わす比較例よりも圧縮残留応
力が低いことが判る。In addition, Fig. 3 shows the test data of the compressive residual stress of the mission gear W surface layer (50 μm depth below the surface) added by shot peening. It can be seen that the compressive residual stress is lower than that of the comparative example expressed as .
また、このテストデータは、２００℃を越えるとショッ
トピーニングにより付加されたミッションギヤＷ表面層
の圧縮残留応力が減衰していることから、加熱エアＡの
温度上限を２００℃に設定することが好ましいことを物
語っている。なお、上記テストデータを得るにあたって
の本実施例および比較例における浸炭焼入れ・焼戻し後
の疲労耐久限度は、本実施例では約５８ ｋｇｆ’／ｍ
ｍ２、比較例では約５２ 、 ５ ｋｇｆ／ｍｍ”であ
った。このテストデータを得るにあたってのショットピ
ーニング条件および低温焼戻しの加熱時間は、前述のテ
スト条件と同じである。Additionally, this test data shows that the compressive residual stress on the surface layer of the mission gear W added by shot peening is attenuated when the temperature exceeds 200°C, so it is preferable to set the upper temperature limit of the heated air A to 200°C. That's telling. In addition, the fatigue durability limit after carburizing and quenching and tempering in this example and comparative example in obtaining the above test data is approximately 58 kgf'/m in this example.
m2, was about 52.5 kgf/mm'' in the comparative example.The shot peening conditions and low temperature tempering heating time for obtaining this test data were the same as the above-mentioned test conditions.
なお、上記実施例において、ショット粒子Ｂ。Note that in the above examples, shot particles B.
Ｂ、・・・の噴出と加熱エアＡの噴出とを同時に完了す
ることが好ましいが、例えばミッションギヤＷの肉厚差
等によってミッションギヤＷ表面層の温度が上記加熱エ
アＡの温度と同程度の温度に達しない場合も起こり得る
。このため、ショット粒子Ｂ、Ｂ、・・・噴出後、ミッ
ションギヤ界表面層の温度が所定温度に達するまで加熱
エアＡを噴出するようにしてもよい。また、ショット粒
子Ｂ、Ｂ。It is preferable to complete the ejection of B, . There may also be cases where the temperature is not reached. For this reason, after the shot particles B, B, . . . are ejected, the heated air A may be ejected until the temperature of the mission gear interface surface layer reaches a predetermined temperature. Also, shot particles B, B.
・・・の噴出と加熱エアＡの噴出とを同時に完了させる
べく、ミッションギヤＷの肉厚に応じて加熱エアＡの温
度を予め１００〜２００℃よりも高くしておくこともよ
い。In order to simultaneously complete the ejection of ... and the ejection of the heated air A, the temperature of the heated air A may be set higher than 100 to 200°C in advance depending on the thickness of the mission gear W.
また、上記実施例では、鋼製部材が自動車等車両のトラ
ンスミッションのミッションギヤＷである場合を示した
が、これに限らないことは勿論である。Further, in the above embodiment, the case where the steel member is the mission gear W of the transmission of a vehicle such as an automobile is shown, but it is needless to say that the steel member is not limited to this.
（発明の効果）
以上説明したように、本発明方法によれば、焼戻し後の
鋼製部材に対しショット粒子を加熱エアと共にエアノズ
ル方式により噴出させることにより、上記鋼製部材を１
００〜２００℃に加熱した状態でショットピーニングす
るので、鋼製部材表面層の靭性の回復を図って高面圧・
高すべり重負荷の下での表面亀裂感受性を低下せしめ、
これにより曲げ疲労強度を確保しつつ耐ピッチング性の
優れた鋼製部材を効率よく得ることができる。(Effects of the Invention) As explained above, according to the method of the present invention, shot particles are ejected together with heated air to the steel member after tempering using an air nozzle method, so that the steel member can be
Since shot peening is performed while heated to 00 to 200°C, the toughness of the surface layer of the steel member is restored and high contact pressure and
Reduces surface crack susceptibility under high sliding and heavy loads,
This makes it possible to efficiently obtain a steel member with excellent pitting resistance while ensuring bending fatigue strength.
第１図は本発明の実施例に係る鋼製部材耐ピッチング性
向上方法によりミッションギヤをショットピーニングす
る要領を示す説明図、第２図は本実施例のピッチング発
生サイクル数を比較例と比較したテストデータを示す図
、第３図は本実施例のミッションギヤ表面層の圧縮残留
応力を比較例と比較したテストデータを示す図である。
Ａ・・・加熱エア、Ｂ・・・ショット粒子、Ｗ・・・ミ
ッションギヤ。
特 許 出 願 人 マツダ株式会社゛代 理
人 前 １） 弘 。
（％）
第３ 図
温度（°Ｃ）
第２図
じ゛７＋ン７９：生１イクル劃くFig. 1 is an explanatory diagram showing the procedure for shot peening a transmission gear using the method for improving pitting resistance of steel members according to an embodiment of the present invention, and Fig. 2 shows a comparison of the number of pitching cycles in this embodiment with a comparative example. FIG. 3 is a diagram showing test data comparing the compressive residual stress of the surface layer of the mission gear of this example with that of a comparative example. A... Heated air, B... Shot particles, W... Mission gear. Patent applicant: Mazda Motor Corporation Representative 1) Hiroshi. (%) Fig. 3 Temperature (°C) Fig. 2 J7+N79: 1 cycle of raw material
Claims (1)
たのち焼戻しし、次いで、この焼戻し後の鋼製部材に対
しショット粒子を加熱エアと共にエアノズル方式により
噴出させることにより、鋼製部材を１００〜２００℃に
加熱した状態でショットピーニングすることを特徴とす
る鋼製部材の耐ピッチング性向上方法。(1) A steel member is carburized and quenched or carbonitrided and then tempered, and then shot particles are ejected along with heated air to the tempered steel member using an air nozzle method, whereby the steel member is heated to a temperature of 100 to 200 A method for improving pitting resistance of a steel member, comprising shot peening in a state heated to ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2954688A JPH01205026A (en) | 1988-02-10 | 1988-02-10 | Method for improving pitting resistance of steel-made member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2954688A JPH01205026A (en) | 1988-02-10 | 1988-02-10 | Method for improving pitting resistance of steel-made member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01205026A true JPH01205026A (en) | 1989-08-17 |
Family
ID=12279129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2954688A Pending JPH01205026A (en) | 1988-02-10 | 1988-02-10 | Method for improving pitting resistance of steel-made member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01205026A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5816088A (en) * | 1996-04-15 | 1998-10-06 | Suncall Corporation | Surface treatment method for a steel workpiece using high speed shot peening |
| JP2006304842A (en) * | 2005-04-26 | 2006-11-09 | Juki Corp | Sliding mechanism, looper mechanism of sewing machine, and needle bar driving mechanism of sewing machine |
| CN106148650A (en) * | 2016-07-01 | 2016-11-23 | 兴化东华齿轮有限公司 | A kind of energy saving and environment friendly Technology for Heating Processing |
-
1988
- 1988-02-10 JP JP2954688A patent/JPH01205026A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5816088A (en) * | 1996-04-15 | 1998-10-06 | Suncall Corporation | Surface treatment method for a steel workpiece using high speed shot peening |
| JP2006304842A (en) * | 2005-04-26 | 2006-11-09 | Juki Corp | Sliding mechanism, looper mechanism of sewing machine, and needle bar driving mechanism of sewing machine |
| CN106148650A (en) * | 2016-07-01 | 2016-11-23 | 兴化东华齿轮有限公司 | A kind of energy saving and environment friendly Technology for Heating Processing |
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