JPH06297172A - Manufacture of ferrous sintered parts - Google Patents
Manufacture of ferrous sintered partsInfo
- Publication number
- JPH06297172A JPH06297172A JP5112111A JP11211193A JPH06297172A JP H06297172 A JPH06297172 A JP H06297172A JP 5112111 A JP5112111 A JP 5112111A JP 11211193 A JP11211193 A JP 11211193A JP H06297172 A JPH06297172 A JP H06297172A
- Authority
- JP
- Japan
- Prior art keywords
- sintered
- welding
- parts
- strength
- sintered parts
- 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
- Laser Beam Processing (AREA)
- Powder Metallurgy (AREA)
Abstract
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 manufacturing iron-based sintered parts or a joined part of a sintered part and a steel material, which is mainly used for power transmission systems of automobiles.
【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 The problem in welding iron-based sintered materials is that the sintered materials themselves are porous, so that the holes in the base material are aggregated and large blow holes are generated. This is because when it occurs in the weld metal, the strength of the welded part cannot be ensured and cracks easily occur.
【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。Electron beam welding, arc welding, resistance welding and the like can be considered as welding methods, but 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, the gas expands and blows out from the 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 since the welding heat input required to perform welding of the same plate thickness is large, welding distortion is large, In particular, it is difficult to apply it to automobile power transmission system parts that require 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。Resistance welding represented by projection welding cannot be applied to important parts because the joint area cannot be increased due to the capacity of the power source and the strength of the joint is insufficient.
【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 few restrictions on the joint area. Therefore, if welding defects can be prevented and joint strength can be secured, it is extremely possible. It can be said that 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 laser welding while supplying a filler material having a specific component, as represented by JP-A-4-284989. This method can be said to be an excellent method in the sense 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 the conventional laser welding, although a sound weld is obtained, the joint strength is not sufficient,
There was a problem in applying it to important 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 treated with an oxide film for the purpose of improving the corrosion resistance, wear resistance or airtightness of the sintered material when it is used as it is sintered. May be given.
【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 treated with an oxide film as in the latter has a very high oxygen content, when welding this, even if the above method is applied, the occurrence of void defects can be avoided. Difficult to do. Further, even if the void defects in the weld metal can be suppressed to a slight degree, the joint obtained by this method is
In many cases, it is not possible to obtain the same tensile strength as the base material of the sintered material. Therefore, when welding the iron-based sintered materials that have been subjected to the oxidation treatment or between the iron-based sintered material and the steel that have been subjected to the oxidation treatment, At present, there is no technically established method for producing a welded part having sound and high joint strength.
【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 of sintered parts and steel, it is advantageous in terms of penetration depth, strength, productivity and strain. it is conceivable that. However, since the sintered material usually has a considerably high C content and the existence of vacancies, the occurrence of defects such as cold cracking and blowholes cannot be avoided.
【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 that has been subjected to an oxidation treatment. Even if the occurrence of defects in the weld metal is suppressed to a slight extent, the problem of deterioration of joint strength due to hardening of the weld heat affected zone remains. Therefore, in the welded joint of the iron-based sintered materials that have been subjected to the oxidation treatment or between the iron-based sintered material and the steel that have been subjected to the oxidation treatment, it is possible to prevent the occurrence of welding defects and to cause the hardening of the weld heat affected zone. Without solving the problem of deterioration of joint strength, it is impossible to manufacture a welded part of a sintered material that has been 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 demands, and provides a method for obtaining a joint strength comparable to that of a base material in a sintered part welded by laser welding without welding defects. That is the purpose.
【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又は焼結部品と鋼材との溶接を行
い、その後に後熱処理を施し、特に、４５０〜５５０℃
の高温水蒸気雰囲気で酸化処理を行って後熱処理を兼ね
ることで、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, as a result of intensive studies by the present inventors, as a result of laser welding, iron-based sintered parts are welded to each other or sintered parts and steel materials are welded. Post-heat treatment, especially 450-550 ℃
It was found that the above problems can be solved by performing the oxidation treatment in the high temperature steam atmosphere and also performing the post heat treatment, and the present invention is made here.
【００１６】[0016]
【作用】以下に本発明を更に詳述する。The present invention will be described in more detail below.
【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 parts used as machine parts generally contain 0.4% or more of C. When such a sintered component is welded by the laser welding method, blowholes due to the holes in the base material are generated, and cold cracking is likely to occur.
As a method for solving this, there is a method represented by JP-A-4-284989 shown 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, the iron-based sintered parts or the sintered parts and the steel material are first joined by laser welding. At this time, it is preferable to use a filler material having an appropriate component composition so that blowholes and cracks are less likely to occur. This suppresses the occurrence of defects in the weld metal. Other conditions for 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 the filler material, the composition of the material used contains at least Ni in the range of 5 to 50% and Mn in the range of 5 to 30%, whereby the structure of the weld metal is austenite or a mixed structure of austenite. Therefore, martensite transformation is suppressed, and low temperature cracking due to hardening can be prevented. Further, it contains at least one kind of Al, Ti, V and Zr, and the total amount thereof is 0.2 to 5
By setting it as%, it is possible to prevent blowholes from being generated due to bonding with nitrogen or oxygen. Where Ni
Is less than 5%, it is insufficient to suppress the martensitic transformation of the weld metal, and if it exceeds 50%, hot cracking tends to occur in the weld metal. Further, if Mn is less than 5%, the deoxidizing power is insufficient and the martensitic transformation is also insufficiently suppressed. On the other hand, even if Mn exceeds 30%, not only the effect is saturated but also the ductility of the weld metal deteriorates. 0.2% for Al, Ti, V, and Zr
If it is less than 5%, there is no effect, and if it exceeds 5%, the appearance of the weld bead is significantly deteriorated and cracks are likely to occur.
【００２０】しかしながら、単にレーザ溶接しただけで
は、母材並の充分な継手強度が得られない。この問題を
解決するため、本発明では、レーザ溶接後に後熱処理を
施すのである。後熱処理は、焼結部品における溶接熱影
響部の硬さ低下による切欠強度の改善に寄与するため、
溶接継手部の引張試験を行った場合に、焼結部品母材の
強度を下回る強度で溶接熱影響部で破断することが防止
され、結果として焼結材母材並の継手強度が得られる。However, a sufficient joint strength comparable to that of the base material cannot be obtained by simply laser welding. In order to solve this problem, in the present invention, post heat treatment is performed after laser welding. Since the post heat treatment contributes to the improvement of the notch strength due to the decrease in the hardness of the weld heat affected zone in the sintered part,
When a tensile test is performed on the welded joint, it is possible to prevent the welded heat-affected zone from breaking at a strength lower than the strength of the base material of the sintered component, and as a result, joint strength comparable to that of the base material of the sintered material is obtained.
【００２１】後熱処理条件は特に限定されるものではな
いが、温度は４００〜６００℃の範囲が好ましい。な
お、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、かえって焼結部品そのも
のの強度が低下するため好ましくない。The post heat treatment conditions are not particularly limited, but the temperature is preferably in the range of 400 to 600 ° C. The holding time is preferably 10 minutes or longer. If it is less than this, softening of the heat-affected zone becomes insufficient, and desired performance cannot be obtained. However, even if the holding time exceeds 5 hours, the effect is not only saturated, but rather the strength of the sintered part itself is lowered, which is not preferable.
【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 which 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 high. Due to its high cost, it becomes more difficult to avoid the occurrence of cavity defects when laser welding this. Even if the void defects of the weld metal are suppressed to a slight level, the hardness of the weld 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、レーザ溶接後に後熱処理を兼ねて、４００
〜６００℃の温度範囲の酸化皮膜処理を施すものであ
る。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。勿論、この酸化皮膜処
理は後熱処理を兼ねているので、後熱処理の効果とし
て、焼結部品母材並の継手強度が得られる。Therefore, in the present invention, as the base material, the sintered part which has been subjected to the oxide film treatment is not used, and the as-sintered base material is used.
The oxide film treatment is performed in the temperature range of up to 600 ° C. Thereby, the corrosion resistance, wear resistance, or airtightness of the sintered part can be improved. Therefore, according to the present invention, the same excellent characteristics (corrosion resistance, corrosion resistance, etc.) as those of the sintered component base material subjected to the oxide film treatment can be obtained without intentionally using the sintered component subjected to the oxide film treatment as the base material. Wearable or airtight products are obtained. Of course, this oxide film treatment also serves as a post heat treatment, and as a result of the post heat treatment, a joint strength comparable to that of a sintered component base material can be obtained.
【００２４】なお、酸化皮膜処理における保持時間につ
いては、後熱処理の場合と同様であり、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 the same as in the case of the post heat treatment, and 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, even if the holding time exceeds 5 hours, not only is the effect saturated, but the strength of the sintered material itself decreases, 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-mentioned manufacturing conditions, there is no welding defect between the iron-based sintered parts or the joined part of the sintered material and the steel material, and the joint strength is similar to that of the base material of the sintered part. It is possible to manufacture a joined part having improved corrosion resistance, wear resistance or airtightness.
【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 component systems and compositions can be used as the iron-based sintered parts. Further, in the case of a combination of a sintered part and a steel material, the sintered part may be a non-iron-based sintered part, and the steel material may be 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。Example 1 This example 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 was performed on iron-based sintered parts (two types of materials, steam treated material and as-sintered material) having the chemical compositions and densities shown in Table 1. The size of each test piece is 5 mm (thickness) ×
Laser welding was performed under the conditions shown in Table 2 in a state of 50 mm (width) × 100 mm (length) with the surfaces in the length direction butted against each other. When welding, the chemical composition of 1.2 mmφ shown in Table 3
Diameter filler wire 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 sampled. For welded joints of as-sintered material, steam treatment (400 ° C, 500
C. and 600.degree. C..times.1 hr), and tensile test pieces were collected. At the same time, tensile test pieces were also taken from the base material of the as-sintered material, and the tensile test was performed on each.
【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。The test results are shown in Table 4. Among the comparative examples, the one in which the base material after the steam treatment was welded could not be subjected to the tensile test because many large void defects were found in the X-ray inspection. Further, the strength of the as-sintered material, which was not subjected to steam treatment after welding, in the joint tensile test was significantly inferior to that of the sintered base material. On the other hand, in the example of the present invention, the as-sintered material was welded and then subjected to steam treatment, no defects were found in the X-ray inspection, and the strength in the joint tensile test was similar to that of the sintered base material. It was confirmed that
【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。Example 2 This example 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. S50 of the same size as the sintered parts for steel
Using a component corresponding 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。The test results are shown in Table 5. Among the comparative examples, in the welding of the steam-treated material and the steel material, a huge void defect was found in the X-ray inspection, and therefore the tensile test could not be conducted. Further, in the comparative example in which the as-sintered material and the steel material were welded and no steam treatment was performed 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 example of the present invention, the as-sintered material and the steel material were welded and then subjected to steam treatment, no defects were found in the X-ray inspection, and the strength in the joint tensile test was the same as that of the sintered base material. It was confirmed that
【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。Example 3 This example is an example of examining the relationship between steam treatment conditions and strength.
【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 welded joint of the as-sintered material 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 steam treatment conditions and joint tensile strength. As shown in the table, when the holding time under the steam treatment condition is extremely short (5 minutes), high strength cannot be obtained. In addition, the condition exceeds 600 ℃, or 5 hours at 600 ℃
It was confirmed that the strength exceeding the range of the present invention could not be obtained under the conditions exceeding the range.
【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,
In the iron-based sintered parts or in the joined part of the sintered parts and the steel material, there is no welding defect and the joint strength comparable to that of the base material of the sintered parts is obtained. Further, by utilizing the effect of the oxide film treatment, it is possible to provide a bonded component in which the corrosion resistance, wear resistance or airtightness of the sintered component 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 diagram 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 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Fumito Yoshino 100-1 Urakawachi Urakawachi, Fujisawa-shi, Kanagawa Kobe Steel, Fujisawa Works
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後熱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. When manufacturing iron-based sintered parts or a joined part of a sintered part and a steel material, they are welded and joined by a laser welding method, and then the joined part is subjected to post heat treatment. Manufacturing method of sintered parts.
理を行い、後熱処理を兼ねることを特徴とする請求項１
に記載の鉄系焼結部品の製造方法。2. The oxide film treatment at 400 to 600 ° C. is performed after welding, and the post heat treatment is also performed.
A method for manufacturing an iron-based sintered component according to.
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 true JPH06297172A (en) | 1994-10-25 |
| JP2831903B2 JP2831903B2 (en) | 1998-12-02 |
Family
ID=14578436
Family Applications (1)
| 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012510898A (en) * | 2008-12-05 | 2012-05-17 | ティッセンクルップ テイラード ブランクス ゲゼルシャフト ミット ベシュレンクテル ハフツング | Manufacturing method for custom-made sheet metal strip |
-
1993
- 1993-04-15 JP JP5112111A patent/JP2831903B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012510898A (en) * | 2008-12-05 | 2012-05-17 | ティッセンクルップ テイラード ブランクス ゲゼルシャフト ミット ベシュレンクテル ハフツング | Manufacturing method for custom-made sheet metal strip |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2831903B2 (en) | 1998-12-02 |
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