JP2831903B2 - Manufacturing method of iron-based sintered parts - Google Patents
Manufacturing method of iron-based sintered partsInfo
- Publication number
- JP2831903B2 JP2831903B2 JP5112111A JP11211193A JP2831903B2 JP 2831903 B2 JP2831903 B2 JP 2831903B2 JP 5112111 A JP5112111 A JP 5112111A JP 11211193 A JP11211193 A JP 11211193A JP 2831903 B2 JP2831903 B2 JP 2831903B2
- Authority
- JP
- Japan
- Prior art keywords
- sintered
- welding
- iron
- strength
- joint
- 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.)
- Expired - Fee Related
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- Powder Metallurgy (AREA)
- Laser Beam Processing (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、主として自動車の動力
伝達系等に用いられる鉄系焼結部品同士或いは焼結部品
と鋼材との接合部品を製造する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 producing iron-based sintered parts or a joined part of a sintered part and a steel material used mainly in a power transmission system of an automobile.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】鉄系焼
結材を溶接するに際しての問題は、焼結材そのものが多
孔質であるため、母材の空孔が集合し、大きなブローホ
ールが溶接金属に発生して、溶接部の強度が確保できな
くなると共に、割れが発生し易い点にある。2. Description of the Related Art A problem in welding an iron-based sintered material is that since the sintered material itself is porous, pores of a base material gather and large blowholes are formed. It is generated in the weld metal, so that the strength of the welded portion cannot be secured and cracks are easily generated.
【０００３】溶接方法としては、電子ビーム溶接、アー
ク溶接或いは抵抗溶接等が考えられるが、鉄系焼結材に
これらの溶接方法を適用する場合、それぞれ次のような
問題がある。[0003] Electron beam welding, arc welding, resistance welding, and the like can be considered as welding methods. However, when these welding methods are applied to iron-based sintered materials, there are the following problems.
【０００４】すなわち、電子ビーム溶接は、一般に真空
中で溶接するため、溶接時に焼結材に存在する内部空孔
からガスが膨張して吹き出し、良好な溶接部を得ること
が難しい。That is, since electron beam welding is generally performed in a vacuum, gas expands and blows out from internal holes existing in the sintered material during welding, and it is difficult to obtain a good weld.
【０００５】アーク溶接の場合は、熱源のエネルギー密
度が小さいため、深い溶込みが得にくいこと、及び同じ
板厚の溶接を行うのに必要な溶接入熱が大きくなるた
め、溶接歪みが大きく、特に、寸法精度を要する自動車
の動力伝達系の部品への適用が難しい。In the case of arc welding, since the energy density of the heat source is small, it is difficult to obtain deep penetration, and the welding heat input required for performing welding with the same plate thickness becomes large. In particular, it is difficult to apply the present invention to parts of a power transmission system of an automobile requiring dimensional accuracy.
【０００６】また、プロジェクション溶接を代表とする
抵抗溶接は、電源容量の関係で、接合面積を大きくする
ことができず、接合部の強度が不足し、重要部品への適
用が難しい。In addition, resistance welding represented by projection welding cannot increase the joint area due to the power supply capacity, the joint strength is insufficient, and is difficult to apply to important parts.
【０００７】これらの溶接方法に対して、レーザ溶接
は、大気中で溶接が可能であり、エネルギー密度が高
く、接合面積に対する制限が少ないことから、溶接欠陥
の防止及び継手強度が確保できれば、極めて有効な溶接
方法と云える。In contrast to these welding methods, laser welding can be performed in the atmosphere, has a high energy density, and has little restriction on the joint area. This is an effective welding method.
【０００８】これの問題を解決する方法として、特開平
４−２８４９８９号に代表される如く、特定の成分の溶
加材を供給しながら、レーザ溶接する方法が提案されて
いる。この方法は、溶接金属の欠陥を防止し、健全な溶
接部を得るという意味では優れた方法と云える。As a method for solving this problem, there has been proposed a method of performing laser welding while supplying a filler metal having a specific component, as typified by Japanese Patent Application Laid-Open No. 4-284899. This method can be said to be an excellent method in terms of preventing defects in the weld metal and obtaining a sound weld.
【０００９】しかしながら、従来のレーザ溶接では、健
全な溶接部が得られるものの、継手強度が充分でなく、
重要部品への適用に問題があった。However, in conventional laser welding, a sound weld can be obtained, but the joint strength is not sufficient.
There was a problem with application to critical parts.
【００１０】一方、鉄系焼結材は、焼結ままで利用され
る場合と、焼結材の耐食性、耐摩耗性或いは気密性を向
上させることを目的として、焼結材に酸化皮膜処理を施
す場合がある。On the other hand, an iron-based sintered material is subjected to an oxide film treatment on the sintered material in a case where the sintered material is used as it is and for the purpose of improving the corrosion resistance, wear resistance or airtightness of the sintered material. May be applied.
【００１１】後者のように酸化皮膜処理が施された鉄系
焼結材は、酸素含有量が極めて高いため、これを溶接す
る場合、上記方法を適用しても、空洞欠陥の発生を回避
することが難しい。また、仮に溶接金属の空洞欠陥を軽
微に抑えられたとしても、この方法で得られた継手は、
焼結材母材並の引張強度が得られないことが多く、した
がって、酸化処理が施された鉄系焼結材同士或いは酸化
処理が施された鉄系焼結材と鋼材との溶接に際し、健全
かつ高い継手強度を有する溶接部品の製作方法は技術的
に確立されていないのが現状である。Since the iron-based sintered material which has been subjected to the oxide film treatment as described above has an extremely high oxygen content, even when the above method is applied to the case of welding, it is possible to avoid the occurrence of void defects. It is difficult. Also, even if the cavity defects of the weld metal were slightly suppressed, the joint obtained by this method was
In many cases, the same tensile strength as the sintered material base material cannot be obtained, and therefore, when welding iron-based sintered materials subjected to oxidation treatment or between iron-based sintered material subjected to oxidation treatment and steel, At present, a method for producing a welded part having sound and high joint strength has not been technically established.
【００１２】上述のように、鉄系焼結部品同士或いは焼
結部品と鋼材の接合に対しては、高エネルギー密度溶接
が適用できれば、溶込み深さ、強度、生産性、歪みの面
で有利と考えられる。しかしながら、焼結材は通常かな
り高いＣ含有量であること、及び空孔が存在することか
ら、低温割れやブローホール等の欠陥の発生が避けられ
ない。As described above, if high energy density welding can be applied to the joining of iron-based sintered parts or between a sintered part and a steel material, it is advantageous in terms of penetration depth, strength, productivity, and distortion. it is conceivable that. However, since the sintered material usually has a considerably high C content and the presence of voids, it is inevitable that defects such as low-temperature cracking and blow holes occur.
【００１３】特に酸化処理が施された焼結材は空洞欠陥
の発生を防止することが難しい。仮に溶接金属の欠陥の
発生が軽微に抑えられたとしても、溶接熱影響部の硬化
に起因する継手強度の劣化の問題が残される。したがっ
て、酸化処理が施された鉄系焼結材同士或いは酸化処理
が施された鉄系焼結材と鋼材の溶接継手において、溶接
欠陥の発生を防止し、かつ溶接熱影響部の硬化に起因す
る継手強度の劣化の問題を解決しなければ、焼結材の性
能を向上させるのに有効な酸化処理を施した焼結材の溶
接部品が製造できない。In particular, it is difficult to prevent the occurrence of void defects in a sintered material subjected to an oxidation treatment. Even if the occurrence of defects in the weld metal is slightly suppressed, the problem of deterioration in joint strength due to the hardening of the heat affected zone remains. Therefore, it is possible to prevent the occurrence of welding defects in the welded joint between the iron-based sintered materials subjected to the oxidation treatment or between the iron-based sintered material subjected to the oxidation treatment and the steel material, and to prevent the welding heat-affected zone from being hardened. Unless the problem of the deterioration of the joint strength is solved, it is impossible to manufacture a welded part of a sintered material subjected to an oxidation treatment effective for improving the performance of the sintered material.
【００１４】本発明は、かゝる要請に応えるべくなされ
たものであって、レーザ溶接により溶接された焼結部品
において、溶接欠陥がなく、母材並の継手強度が得られ
る方法を提供することを目的とするものである。The present invention has been made in order to meet such a demand, and provides a method of obtaining a joint strength equivalent to that of a base material without welding defects in a sintered part welded by laser welding. The purpose is to do so.
【００１５】[0015]
【課題を解決するための手段】上記課題を解決するた
め、本発明者等が鋭意研究を重ねた結果、レーザ溶接に
より鉄系焼結部品同士或いは焼結部品と鋼材との溶接を
行い、その後に酸化皮膜処理を施し、特に４００〜６０
０℃の高温水蒸気雰囲気で酸化皮膜処理を行うことで、
前記課題を解決できることを見い出し、ここに本発明を
なしたものである。Means for Solving the Problems In order to solve the above problems, the present inventors have conducted intensive studies, and as a result, welded iron-based sintered parts or sintered parts and steel to each other by laser welding. To an oxide film treatment, especially 400 to 60
By performing the oxide film treatment in a high temperature steam atmosphere of 0 ° C,
The inventors have found that the above-mentioned problems can be solved, and have made the present invention.
【００１６】[0016]
【作用】以下に本発明を更に詳述する。The present invention will be described below in more detail.
【００１７】機械部品として用いられる焼結部品は、一
般に０.４％以上のＣを含んでいる。このような焼結部
品をレーザ溶接法で溶接すると、母材の空孔に起因する
ブローホールが発生すると共に低温割れが発生し易い。
これを解決する方法としては、従来技術の項で示した特
開平４−２８４９８９号に代表される方法がある。Sintered components used as mechanical components generally contain 0.4% or more of C. When such a sintered part is welded by a laser welding method, a blow hole due to a hole in the base material is generated and a low-temperature crack is easily generated.
As a method for solving this, there is a method typified by Japanese Patent Application Laid-Open No. Hei 4-2848989 described in the section of the prior art.
【００１８】本発明では、従来技術と同様、鉄系焼結部
品同士或いは焼結部品と鋼材をまずレーザ溶接により接
合する。その際、ブローホールや割れが発生しにくくな
るように、適切な成分組成の溶加材を利用することが好
ましい。これにより、溶接金属の欠陥発生が抑制され
る。レーザ溶接の他の条件は特に制限されない。In the present invention, as in the prior art, iron-based sintered parts or a sintered part and a steel material are first joined by laser welding. At that time, it is preferable to use a filler material having an appropriate component composition so that blow holes and cracks are less likely to occur. Thereby, the occurrence of defects in the weld metal is suppressed. Other conditions of the laser welding are not particularly limited.
【００１９】例えば、溶加材としては、用いる材料の成
分に、少なくともＮiを５〜５０％、Ｍnを５〜３０％の
範囲で含有させることにより、溶接金属の組織をオース
テナイト或いはオーステナイトの混合組織にできるた
め、マルテンサイト変態が抑制され、硬化に起因する低
温割れが防止できる。更に、Ａl、Ｔi、Ｖ、Ｚrのうち
の少なくとも１種以上を含有し、その合計が０.２〜５
％とすることで、窒素或いは酸素と結び付き、これに起
因するブローホールの発生が防止できる。ここで、Ｎi
が５％未満では溶接金属のマルテンサイト変態を抑制す
るに不十分であり、５０％を超えると、溶接金属に高温
割れが発生し易くなる。また、Ｍnが５％未満では脱酸
力が不十分であると共に、マルテンサイト変態の抑制に
対しても不十分となる。一方、Ｍnが３０％を超えて含
有させてもその効果が飽和するばかりか、溶接金属の延
性が劣化する。Ａl、Ｔi、Ｖ、Ｚrについては、０.２％
未満では効果がなく、５％を超えると溶接ビード外観が
著しく劣化すると共に、割れが発生し易くなる。For example, as a filler material, at least Ni is contained in the range of 5 to 50% and Mn is contained in the range of 5 to 30%, so that the structure of the weld metal is austenite or a mixed structure of austenite. Therefore, martensitic transformation is suppressed, and low-temperature cracking due to hardening can be prevented. Further, at least one of Al, Ti, V, and Zr is contained, and the total is 0.2 to 5
%, It is possible to prevent generation of blowholes associated with nitrogen or oxygen. Where Ni
If it is less than 5%, it is insufficient to suppress the martensitic transformation of the weld metal, and if it exceeds 50%, hot cracks are easily generated in the weld metal. When Mn is less than 5%, the deoxidizing power is insufficient and the martensitic transformation is insufficiently suppressed. On the other hand, if Mn is contained in excess of 30%, not only the effect is saturated, but also the ductility of the weld metal is deteriorated. 0.2% for Al, Ti, V, and Zr
If it is less than 5%, the effect is not obtained. If it exceeds 5%, the appearance of the weld bead is remarkably deteriorated, and cracks are easily generated.
【００２０】[0020]
【００２１】[0021]
【００２２】一方、前述のとおり、鉄系焼結部品の耐食
性、耐摩耗性或いは気密性を向上させることを目的とし
て行う酸化皮膜処理が施された焼結部品の場合は、酸素
含有量が極めて高いため、これをレーザ溶接すると空洞
欠陥の発生を回避することが更に難しくなる。また、仮
に溶接金属の空洞欠陥を軽微に抑えられたとしても、溶
接熱影響部の硬さが極めて高くなり、切欠強度が低くな
るため、焼結材母材並の強度が得られない。On the other hand, as described above, in the case of a sintered part that has been subjected to an oxide film treatment for the purpose of improving the corrosion resistance, wear resistance, or airtightness of the iron-based sintered part, the oxygen content is extremely low. Due to its high height, it is more difficult to avoid the occurrence of cavity defects by laser welding. Further, even if the cavity defects of the weld metal are slightly suppressed, the hardness of the heat affected zone becomes extremely high and the notch strength becomes low, so that the strength equivalent to that of the sintered material base material cannot be obtained.
【００２３】そこで、本発明では、母材として、酸化皮
膜処理が施された焼結部品を使用せず、焼結ままの母材
を使用して、レーザ溶接後に酸化皮膜処理を施すもので
ある。ここで該酸化皮膜処理は４００〜６００℃の温度
範囲が望ましい。これにより、焼結部品の耐食性、耐摩
耗性或いは気密性を向上させることができる。したがっ
て、母材として酸化皮膜処理が施された焼結部品を敢え
て使用せずとも、本発明によれば、酸化処理皮膜処理が
施された焼結部品母材と同様の優れた特性（耐食性、耐
摩耗性或いは気密性）の製品が得られるのである。ま
た、この酸化皮膜処理によって、焼結部品母材並の継手
強度が得られる。Therefore, in the present invention, the oxide film treatment is performed after laser welding using the as-sintered base material without using a sintered part subjected to the oxide film treatment as the base material. . Here, the oxide film treatment is desirably performed in a temperature range of 400 to 600 ° C. Thereby, the corrosion resistance, wear resistance, or airtightness of the sintered component can be improved. Therefore, according to the present invention, excellent properties (corrosion resistance, corrosion resistance, etc.) similar to those of the sintered component base material subjected to the oxide film treatment can be obtained without intentionally using a sintered component subjected to the oxide film treatment as the base material. Wear-resistant or air-tight products can be obtained. In addition, the oxide film treatment provides a joint strength equivalent to that of a sintered component base material.
【００２４】なお、酸化皮膜処理における保持時間につ
いては、１０分以上が好ましい。これ以下の場合は酸化
及び熱影響部の軟化が不十分となり、所期の性能が得ら
れない。しかし、保持時間が５時間を超えてもその効果
は飽和するばかりか、かえって焼結材そのものの強度が
低下するため好ましくない。The holding time in the oxide film treatment is preferably 10 minutes or more. If it is less than this, the oxidation and the softening of the heat-affected zone become insufficient, and the desired performance cannot be obtained. However, if the holding time exceeds 5 hours, the effect is not only saturated, but also the strength of the sintered material itself is lowered, which is not preferable.
【００２５】以上の製造条件により、鉄系焼結部品同士
或いは焼結材と鋼材の接合部品において、溶接欠陥がな
く、焼結部品母材並の継手強度を有し、更には焼結部品
の耐食性、耐摩耗性或いは気密性が改善された接合部品
が製造できる。According to the above manufacturing conditions, there is no welding defect in the iron-based sintered parts or in the joint part of the sintered material and the steel material, the joint strength is equal to that of the base material of the sintered part, A joined part with improved corrosion resistance, abrasion resistance or airtightness can be manufactured.
【００２６】なお、鉄系焼結部品としては種々の成分系
及び組成のものが使用できることは云うまでもない。ま
た、焼結部品と鋼材との組合せの場合、焼結部品として
は鉄系以外の焼結部品も可能であり、鋼材も種々の鋼種
が可能である。It goes without saying that various types of components and compositions can be used as the iron-based sintered parts. In the case of a combination of a sintered component and a steel material, the sintered component may be a sintered component other than an iron-based material, and the steel material may be of various steel types.
【００２７】次に本発明の実施例を示す。Next, examples of the present invention will be described.
【００２８】[0028]
【実施例１】本例は焼結部品同士のレーザ溶接の例であ
る。Embodiment 1 This embodiment is an example of laser welding of sintered parts.
【００２９】表１に示す化学成分及び密度の鉄系焼結部
品(水蒸気処理後の材料及び焼結まま材の２種類)のレー
ザ溶接を行った。試験片のサイズはそれぞれ５mm(厚)×
５０mm(幅)×１００mm(長さ)で、長さ方向の面を突き合
わせた状態で、表２に示す条件でレーザ溶接した。な
お、溶接するに際し、表３に示す化学成分の１.２mmφ
径のフィラーワイヤを供給した。Laser welding of iron-based sintered parts (two types of materials after steam treatment and as-sintered materials) having the chemical components and densities shown in Table 1 was performed. Each test piece is 5mm (thick) x
Laser welding was carried out under the conditions shown in Table 2 in a state where the surfaces in the length direction were abutted at 50 mm (width) × 100 mm (length). In addition, when welding, the chemical components shown in Table 3 1.2mmφ
A filler wire having a diameter was supplied.
【００３０】溶接後、溶接部のＸ線検査を行う共に、図
１に示す形状の継手引張試験片を採取した。焼結まま材
の溶接継手については、水蒸気処理(４００℃、５００
℃及び６００℃×１hr)を施した上で引張試験片を採取
した。同時に焼結まま材の母材についても引張試験片を
採取し、それぞれ引張試験を行った。After welding, an X-ray inspection of the welded portion was performed, and a joint tensile test piece having the shape shown in FIG. 1 was collected. For as-sintered welded joints, steam treatment (400 ° C, 500
C. and 600 ° C. for 1 hour), and a tensile test piece was collected. At the same time, a tensile test piece was collected from the as-sintered base material and subjected to a tensile test.
【００３１】試験結果を表４に示す。比較例のうち、水
蒸気処理後の母材を溶接したものは、Ｘ線検査において
多数の巨大空洞欠陥が見られたため、引張試験を行うに
至らなかった。また、焼結まま材で、溶接後水蒸気処理
を施さなかった比較例は、継手引張試験における強度が
焼結母材の強度に比べて著しく劣っていた。一方、本発
明例である焼結まま材を溶接し、その後水蒸気処理を施
したものは、Ｘ線検査において欠陥はみられず、継手引
張試験における強度も焼結母材と同等の値が得られこと
が確認された。Table 4 shows the test results. Of the comparative examples, those obtained by welding the base material after the steam treatment did not lead to the tensile test because a large number of large void defects were observed in the X-ray inspection. Further, in the comparative example in which the material was sintered and not subjected to steam treatment after welding, the strength in the joint tensile test was significantly inferior to the strength of the sintered base material. On the other hand, in the case of the present invention, which was obtained by welding the as-sintered material and then performing steam treatment, no defect was observed in the X-ray inspection, and the strength in the joint tensile test was equivalent to that of the sintered base material. Was confirmed.
【００３２】[0032]
【表１】 [Table 1]
【００３３】[0033]
【表２】 [Table 2]
【００３４】[0034]
【表３】 [Table 3]
【００３５】[0035]
【表４】 [Table 4]
【００３６】[0036]
【実施例２】本例は焼結部品と鋼材のレーザ溶接の例で
ある。Embodiment 2 This embodiment is an example of laser welding of a sintered part and a steel material.
【００３７】鉄系焼結部品には表１に示したものと同様
のものを用いた。鋼材には焼結部品と同サイズのＳ５０
Ｃ相当成分のものを用い、実施例１と同じ要領でレーザ
溶接し、溶接欠陥及び継手引張強度を調べた。The same iron-based sintered parts as those shown in Table 1 were used. For steel, S50 of the same size as sintered parts
Using a component equivalent to C, laser welding was performed in the same manner as in Example 1, and welding defects and joint tensile strength were examined.
【００３８】試験結果を表５に示す。比較例のうち、水
蒸気処理材と鋼材の溶接では、Ｘ線検査において、巨大
空洞欠陥が見られたため、引張試験を行うに至らなかっ
た。また、焼結まま材と鋼材の溶接で、溶接後水蒸気処
理を施さなかった比較例は、継手引張試験における強度
が焼結母材の強度に比べて著しく劣っていた。一方、本
発明例である焼結まま材と鋼材を溶接し、その後水蒸気
処理を施したものは、Ｘ線検査において欠陥はみられ
ず、継手引張試験における強度も焼結母材と同等の値が
得られることが確認された。Table 5 shows the test results. Among the comparative examples, in the welding of the steam-treated material and the steel material, a giant cavity defect was observed in the X-ray inspection, so that the tensile test was not performed. Further, in the comparative example in which steam treatment was not performed after welding by welding the as-sintered material and the steel material, the strength in the joint tensile test was significantly inferior to the strength of the sintered base material. On the other hand, in the example of the present invention, the as-sintered material and the steel material were welded and then subjected to steam treatment, and no defects were observed in the X-ray inspection, and the strength in the joint tensile test was equivalent to that of the sintered base material. Was obtained.
【００３９】[0039]
【表５】 [Table 5]
【００４０】[0040]
【実施例３】本例は水蒸気処理条件と強度の関連を調べ
た例である。[Embodiment 3] This embodiment is an example in which the relationship between steam treatment conditions and strength was examined.
【００４１】実施例１で得られた焼結まま材の溶接継手
に対し、種々の条件で水蒸気処理を施した後、継手引張
強度を調べた。The as-sintered welded joint obtained in Example 1 was subjected to steam treatment under various conditions, and then the joint tensile strength was examined.
【００４２】表６に水蒸気処理条件並びに継手引張強度
を示す。同表に示す如く、水蒸気処理条件における保持
時間が極度に短い場合(５分)は、高い強度が得られな
い。また６００℃を超える条件、或いは６００℃で５hr
を超える条件では、本発明範囲の条件の場合を上回る強
度が得られないことが確認された。Table 6 shows the conditions of steam treatment and the tensile strength of the joint. As shown in the table, when the holding time under the steam treatment conditions is extremely short (5 minutes), high strength cannot be obtained. Conditions exceeding 600 ° C, or 5 hours at 600 ° C
It has been confirmed that, under the conditions exceeding, it is not possible to obtain a strength higher than that under the conditions in the range of the present invention.
【００４３】[0043]
【表６】 [Table 6]
【００４４】[0044]
【発明の効果】以上詳述したように、本発明によれば、
鉄系焼結部品同士或いは焼結部品と鋼材の接合部品にお
いて、溶接欠陥がなく、焼結部品母材並の継手強度が得
られる。また、酸化皮膜処理の効果を利用することによ
り、焼結部品の耐食性、耐摩耗或いは気密性が改善され
た接合部品を提供することができる。As described in detail above, according to the present invention,
There is no welding defect between the iron-based sintered parts or the joint between the sintered part and the steel material, and a joint strength equivalent to that of the sintered part base material can be obtained. In addition, by utilizing the effect of the oxide film treatment, it is possible to provide a bonded part in which the corrosion resistance, wear resistance or airtightness of the sintered part is improved.
【図１】継手引張試験片の形状・寸法を示す図である。FIG. 1 is a view showing the shape and dimensions of a joint tensile test piece.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 芳野文人 神奈川県藤沢市宮前字裏河内100番１株 式会社神戸製鋼所藤沢事業所内 (56)参考文献 特開 昭63−43788（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) B23K 26/00 B23K 31/00 B22F 7/08──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Fumito Yoshino 100-1 Urakawachi, Miyama-ji, Fujisawa-shi, Kanagawa Prefecture Kobe Steel Fujisawa Works (56) References JP-A-63-43788 (JP, A) (58) Field surveyed (Int. Cl. 6 , DB name) B23K 26/00 B23K 31/00 B22F 7/08
Claims (2)
との接合部品を製造するに際し、レーザ溶接法により溶
接接合し、次いで該接合部品に酸化皮膜処理を施すこと
を特徴とする鉄系焼結部品の製造方法。1. A method for manufacturing a joint part between iron-based sintered parts or between a sintered part and a steel material, wherein the joint part is welded by a laser welding method, and then the joint part is subjected to an oxide film treatment. Method for manufacturing sintered parts.
囲で行うことを特徴とする請求項１記載の鉄系焼結部品
の製造方法。2. The method according to claim 1, wherein the oxide film is treated at a temperature of 400 to 600.degree.
The method for producing an iron-based sintered part according to claim 1, wherein the method is performed in an enclosure .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5112111A JP2831903B2 (en) | 1993-04-15 | 1993-04-15 | Manufacturing method of iron-based sintered parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5112111A JP2831903B2 (en) | 1993-04-15 | 1993-04-15 | Manufacturing method of iron-based sintered parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06297172A JPH06297172A (en) | 1994-10-25 |
| JP2831903B2 true JP2831903B2 (en) | 1998-12-02 |
Family
ID=14578436
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5112111A Expired - Fee Related JP2831903B2 (en) | 1993-04-15 | 1993-04-15 | Manufacturing method of iron-based sintered parts |
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| Country | Link |
|---|---|
| JP (1) | JP2831903B2 (en) |
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|---|---|---|---|---|
| DE102008060467B4 (en) * | 2008-12-05 | 2013-08-01 | Thyssenkrupp Tailored Blanks Gmbh | Process for the production of tailor made sheet metal strips |
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1993
- 1993-04-15 JP JP5112111A patent/JP2831903B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06297172A (en) | 1994-10-25 |
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