JP3572350B2 - Driving rivet and manufacturing method thereof - Google Patents
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- JP3572350B2 JP3572350B2 JP16308899A JP16308899A JP3572350B2 JP 3572350 B2 JP3572350 B2 JP 3572350B2 JP 16308899 A JP16308899 A JP 16308899A JP 16308899 A JP16308899 A JP 16308899A JP 3572350 B2 JP3572350 B2 JP 3572350B2
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- 238000004519 manufacturing process Methods 0.000 title claims description 16
- 238000000034 method Methods 0.000 claims description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- 229910052757 nitrogen Inorganic materials 0.000 claims description 15
- 238000010791 quenching Methods 0.000 claims description 12
- 230000000171 quenching effect Effects 0.000 claims description 12
- 238000005496 tempering Methods 0.000 claims description 12
- 238000002161 passivation Methods 0.000 claims description 9
- 229910052804 chromium Inorganic materials 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 8
- 229910052750 molybdenum Inorganic materials 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 6
- 238000010273 cold forging Methods 0.000 claims description 6
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 6
- 238000005260 corrosion Methods 0.000 description 14
- 230000007797 corrosion Effects 0.000 description 14
- 239000000463 material Substances 0.000 description 9
- 239000011651 chromium Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 7
- 238000007747 plating Methods 0.000 description 6
- 239000012298 atmosphere Substances 0.000 description 4
- 229910001105 martensitic stainless steel Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 102220062469 rs786203185 Human genes 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- Forging (AREA)
- Chemical Treatment Of Metals (AREA)
- Heat Treatment Of Articles (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は打ち込みリベット及びその製造方法に係り、その目的は靱性及び硬度が高く、板厚の厚い部材を締結することが可能であって、しかも耐食性に優れ、メッキ処理が不要である打ち込みリベット及びその製造方法を提供することにある。
【０００２】
【従来の技術】
従来、アルミニウム板やＳＵＳ板を締結するための打ち込みリベットは、ＳＵＳＸＭ７やＳＵＳ３８５等の高耐食性の素材からなるものが使用されていた。
しかしながら、これらの素材からなるリベットは強度（耐力）が低いために厚みの薄い板にしか打ち込むことができず、厚い板に打ち込もうとすると板厚に不釣り合いな径の大きな打ち込みリベットが必要となり、この場合には打ち込まれた板が大きく歪んでしまうという問題があった。
そこで、リベットの強度を向上させるために、ＳＵＳ４１０やＳＵＳ４２０等の素材に熱処理を施して使用する場合もあるが、この場合にはリベットが錆びやすくなるという問題があった。勿論、耐食性を向上させるためにメッキ処理を行うことも可能ではあるが、打ち込みの際にメッキが剥がれやすく、また使用中に剥がれる可能性もあり、この場合メッキが剥がれた部分から錆が発生してしまうという問題があった。
【０００３】
【発明が解決しようとする課題】
本発明者らは、上記した実情に鑑みて鋭意研究した結果、特定の元素を特定の割合で含有したステレンレス鋼を材料として使用し、特定の条件下で熱処理を行うことによって、Ｓ３５Ｃ、ＳＣＭ４３５、ＳＣＭ４４０等の炭素鋼や合金鋼と同等またはそれ以上の強度と、ＳＵＳ４１０、ＳＵＳ４２０等の表面処理品よりも優れ、ＳＵＳ３０４と同等以上の耐食性と、これらの素材よりも格段に優れた靱性を備えた打ち込みリベットが得られることを見い出し、本発明の完成に至った。
【０００４】
【課題を解決するための手段】
本発明は上記課題を解決するためになされたものであって、請求項１記載の発明は、頭部と、該頭部の下方に延出された中空筒状の脚部からなる打ち込みリベットであって、Ｃ：０．１〜０．２％、Ｍｎ：１．０％以下、Ｓｉ：１．０％以下、Ｎｉ：１．０〜２．５％、Ｃｒ：１２．０〜１４．０％、Ｍｏ：１．８〜２．３％、Ｎ：０．０５〜０．１５％を含有し、残部Ｆｅ及び不可避的不純物からなる合金鋼からなる線材を冷間圧造した後、窒素減圧雰囲気下での焼き入れ処理と、大気圧下での焼き戻し処理が施され、その後に不動態化処理が施されてなることを特徴とする打ち込みリベットに関する。
【０００５】
請求項２記載の発明は、頭部と、該頭部の下方に延出された中空筒状の脚部からなる打ち込みリベットの製造方法であって、Ｃ：０．１〜０．２％、Ｍｎ：１．０％以下、Ｓｉ：１．０％以下、Ｎｉ：１．０〜２．５％、Ｃｒ：１２．０〜１４．０％、Ｍｏ：１．８〜２．３％、Ｎ：０．０５〜０．１５％を含有し、残部Ｆｅ及び不可避的不純物からなる合金鋼からなる線材を冷間圧造することにより所望形状のリベットを得た後に、窒素減圧雰囲気下にて焼き入れ処理を施し、窒素冷却後に大気圧下にて焼き戻し処理を施し、その後に不動態化処理を施すことを特徴とする打ち込みリベットの製造方法に関する。
【０００６】
請求項３記載の発明は、前記焼き入れ処理条件が、窒素圧：０．１ａｔｍ未満、温度：１０５０〜１１５０℃、時間：５〜１５分であり、焼き戻し処理条件が、大気圧：１ａｔｍ、温度：２００〜２４０℃、時間：２〜３時間であることを特徴とする請求項２記載の打ち込みリベットの製造方法に関する。
【０００７】
【発明の実施の形態】
以下、本発明に係る打ち込みリベット及びその製造方法について、図面を参照しつつ説明する。
本発明に係る打ち込みリベット（１）は、図１に示す如く、頭部（２）と、該頭部（２）の下方に延出された脚部（３）とから構成されるものであり、脚部（３）の先端から中途部までには中心穴（３１）が形成されて中空筒状とされており、かしめ締結時においてはこの部分がかしめ部として作用する。
図２は本発明に係る打ち込みリベット（１）を使用して２枚の被締結部材（４），（５）をかしめ締結した状態を示す図であり、脚部（３）を被締結部材（４），（５）に貫通させて脚部（３）をカールさせることによって、２枚の被締結部材（４），（５）が締結される。
但し、本発明に係る打ち込みリベットは、その材料及び製造方法に特徴を有するものであって、その形状は図示例に限定されるものではなく、頭部の形状、脚部の径、長さ、中心穴深さ等については、従来より使用されている種々の打ち込みリベットの形状を適宜採用することが可能である。
【０００８】
本発明に係る打ち込みリベットは、必須成分として、Ｃ：０．１〜０．２％、Ｎｉ：１．０〜２．５％、Ｃｒ：１２．０〜１４．０％、Ｍｏ：１．８〜２．３％、Ｎ：０．０５〜０．１５％、Ｍｎ：１．０％以下、Ｓｉ：１．０％以下を含有し、残部Ｆｅ及び不可避的不純物からなるステンレス鋼からなる線材を冷間圧造して得られる。
これら必須成分として配合される元素のうち、ニッケル（Ｎｉ）は耐食性を向上させ、クロム（Ｃｒ）は耐食性を向上させるとともに靱性を高め、モリブデン（Ｍｏ）は冷間加工性を良好なものとし、窒素（Ｎ）は硬度及び耐食性を高める役割を果たしている。
【０００９】
上記組成からなるステンレス鋼は、ＳＵＳ３０４よりも優れた耐食性と、ＳＵＳ３０４と同等以上の伸線性、圧造性を有するとともに、マルテンサイト組織を呈し、焼き入れ硬化性が非常に高いという特性を備えている。
【００１０】
本発明に係る打ち込みリベットは、上記組成からなるマルテンサイト系ステンレス鋼を材料として製造されるものであり、以下その製造方法を図３のフローチャートに基づいて説明する。
先ず、上記組成からなるマルテンサイト系ステンレス鋼線を伸線加工し、次いで冷間圧造によって打ち込みリベットとしての形状に加工する。
そして、得られた打ち込みリベットを、窒素雰囲気下にて焼き入れし、窒素冷却した後に大気圧雰囲気下（空気雰囲気）にて焼き戻し処理を施す。
【００１１】
この焼き入れ・焼き戻し処理の条件は、焼き入れ処理条件が、窒素圧：０．１ａｔｍ未満、温度：１０５０〜１１５０℃、時間：５〜１５分とされ、焼き戻し処理条件が、大気圧：１ａｔｍ、温度：２００〜２４０℃、時間：２〜３時間とされる。
ここで、焼き入れ処理を０．１ａｔｍ未満の窒素減圧雰囲気下で行うのは、クロム（Ｃｒ）の分解流出を防止するためであり、焼き入れ条件を１０５０〜１１５０℃×５〜１５分とするのは、表面窒化をできるだけ防ぎ、硬度ＨＲＣ５３以上を得るためである。尚、窒素圧は好ましくは０．０５ａｔｍ以下とされる。
また、焼き戻し条件を２００〜２４０℃×２〜３時間とするのは、リベットの靱性をより持たせ且つ硬度ＨＲＣ４９以上とするためである。
【００１２】
具体的な条件値としては、焼き入れ処理を０．０５ａｔｍの窒素雰囲気下で１１５０℃×１０分、焼き戻し処理を大気圧下で２２０℃×３時間という条件を例示することができ、この条件にて処理された打ち込みリベットはＨｖ５４０の硬度を有するものとなる。
【００１３】
上記した焼き入れ・焼き戻し処理の後、バレル研磨を行って表面を滑らかにし、次いで不動態化処理を行う。
不動態化処理の方法としては、バレル研磨後のリベットを濃硝酸溶液に数分間程度浸漬させる方法を例示させることができるが、特にこの方法に限定されない。
本発明に係る打ち込みリベットは、このように不動態化処理を行うことによって表面に酸化膜が形成されるので、従来のリベットのようにメッキ処理を行わずとも非常に優れた耐食性を有することとなる。従って、水素脆性の危険性が皆無であり、メッキ費を削減することもできる。
【００１４】
【実施例】
以下、本発明に係る打ち込みリベットの実施例及び比較例を示すことにより、本発明の効果をより明確にする。但し、本発明は以下の実施例により何ら限定されるものではない。
（実施例リベットの製造）
表１に示す成分を含有し、残部Ｆｅ及び不可避的不純物からなるマルテンサイト系ステレンレス鋼を材料とし、図３に示す加工工程から最終の不動態化処理を省いた工程により打ち込みリベットを製造した。
尚、焼き入れ処理は０．０５ａｔｍの窒素雰囲気下で１１５０℃×１０分、焼き戻し処理は大気圧下で２２０℃×３時間の条件下で行った。
【表１】
（比較例リベットの製造）
Ｃ：０．３２〜０．３８％、Ｍｎ：０．６０〜０．９０％、Ｓｉ：０．１０〜０．３５％を含有し、残部Ｆｅ及び不可避的不純物からなるＳ３５Ｃ材からなる線材を使用して、図４に示す加工工程によって実施例と同一形状の打ち込みリベットを製造した。
【００１６】
（比較試験）
実施例及び比較例の打ち込みリベットについて、かしめ許容板厚、硬度、耐食性、冷間圧造性、締結強度、靱性について比較した。結果を表２に示す。尚、実施例及び比較例の打ち込みリベットの軸径は共にφ４ｍｍである。
【表２】
かしめ許容板厚は締結可能な被締結部材（ＳＳ４００の板材）の厚さで評価し、硬度はビッカース硬度計にてリベットの脚部表面の中心位置（図１の横向き矢印で示す位置）を測定した。
耐食性は塩水噴霧試験（ＪＩＳ Ｚ ２３７１）にて評価し、冷間圧造性は冷間圧造の容易性により評価した。
締結強度は締結された２枚の被締結部材（ＳＳ４００，厚み１．６ｍｍ×２枚）を分離するための引張強度及び剪断強度を測定し、靱性はかしめ締結時においてクラックが発生しないカール径（図２のＲ寸法）を測定した。
【００１８】
表２の結果から、本発明に係る打ち込みリベットは比較例のものと比べて、かしめ許容板厚の範囲が広く、締結強度（引張強度及び剪断強度）が高いことが分かる。
これは、本発明に係る打ち込みリベットは靱性が高いためにカール径を大きくすることができるためであり、これによってかしめ許容板厚の範囲が広くなり、締結強度（引張強度及び剪断強度）も高くなるといえる。
また、本発明に係る打ち込みリベットは耐食性においても優れており、不動態化処理を施すことによって更に耐食性を向上させることができる。
【００１９】
【発明の効果】
以上説明したように、本発明に係る打ち込みリベット及びその製造方法によれば、Ｃ：０．１〜０．２％、Ｍｎ：１．０％以下、Ｓｉ：１．０％以下、Ｎｉ：１．０〜２．５％、Ｃｒ：１２．０〜１４．０％、Ｍｏ：１．８〜２．３％、Ｎ：０．０５〜０．１５％を含有し、残部Ｆｅ及び不可避的不純物からなる合金鋼からなる線材を冷間圧造して打ち込みリベットを製造するので、耐食性、強度、靱性に優れた打ち込みリベットを得ることができる。
【図面の簡単な説明】
【図１】本発明に係る打ち込みリベットの一部切欠き正面図である。
【図２】本発明に係る打ち込みリベットを使用して２枚の被締結部材をかしめ締結した状態を示す図である。
【図３】本発明に係る打ち込みリベットの製造方法を示すフローチャート図である。
【図４】比較例に係る打ち込みリベットの製造方法を示すフローチャート図である。
【符号の説明】
１ 打ち込みリベット
２ 頭部
３ 脚部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a driving rivet and a method for manufacturing the same, the object of which is to provide a high-toughness and hardness, capable of fastening a member having a large plate thickness, and yet having excellent corrosion resistance and requiring no plating treatment. It is to provide a manufacturing method thereof.
[0002]
[Prior art]
Conventionally, as a driving rivet for fastening an aluminum plate or a SUS plate, a rivet made of a material having high corrosion resistance such as SUSXM7 or SUS385 has been used.
However, rivets made of these materials have low strength (proof strength) and can only be driven into thin plates. To drive into thick plates, rivets with large diameters that are unbalanced with the plate thickness are required. In this case, there is a problem that the driven plate is greatly distorted.
Therefore, in order to improve the strength of the rivet, a material such as SUS410 or SUS420 may be subjected to a heat treatment before use, but in this case, there is a problem that the rivet is easily rusted. Of course, it is possible to perform plating to improve corrosion resistance, but the plating is likely to peel off during driving and may also peel off during use.In this case, rust will occur from the part where the plating has peeled off There was a problem that would.
[0003]
[Problems to be solved by the invention]
The present inventors have conducted intensive studies in view of the above-mentioned circumstances, and as a result, using a stainless steel containing a specific element in a specific ratio as a material and performing heat treatment under specific conditions, S35C, SCM435, It has strength equal to or higher than carbon steel or alloy steel such as SCM440, superior to surface treated products such as SUS410, SUS420, corrosion resistance equal to or higher than SUS304, and significantly higher toughness than these materials. They found that a driving rivet could be obtained, and completed the present invention.
[0004]
[Means for Solving the Problems]
The present invention has been made to solve the above-mentioned problem, and the invention according to claim 1 is a driving rivet including a head and a hollow cylindrical leg extending below the head. C : 0.1 to 0.2%, Mn: 1.0% or less, Si: 1.0% or less, Ni: 1.0 to 2.5%, Cr: 12.0 to 14.0 %, Mo: 1.8 to 2.3%, N: 0.05 to 0.15%, and after cold forging a wire rod made of an alloy steel containing the balance of Fe and unavoidable impurities , and then reducing the pressure in a nitrogen reduced pressure atmosphere. The present invention relates to a driving rivet, wherein a quenching process underneath, a tempering process under atmospheric pressure is performed, and then a passivation process is performed.
[0005]
The invention according to
[0006]
The invention according to
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a driving rivet according to the present invention and a manufacturing method thereof will be described with reference to the drawings.
As shown in FIG. 1, the driving rivet (1) according to the present invention comprises a head (2) and a leg (3) extending below the head (2). A central hole (31) is formed from the tip of the leg (3) to the middle part thereof to form a hollow cylinder, and this portion acts as a caulking portion at the time of caulking.
FIG. 2 is a view showing a state in which the two fastening members (4) and (5) are caulked and fastened using the driving rivet (1) according to the present invention, and the leg (3) is fastened to the fastening member ( The two members (4) and (5) are fastened by allowing the leg (3) to curl by passing through the members (4) and (5).
However, the driving rivet according to the present invention is characterized by its material and manufacturing method, and the shape is not limited to the illustrated example, and the shape of the head, the diameter and length of the legs, As for the depth of the center hole and the like, it is possible to appropriately adopt various shapes of driving rivets conventionally used.
[0008]
The driving rivet according to the present invention has, as essential components, C: 0.1 to 0.2%, Ni: 1.0 to 2.5%, Cr: 12.0 to 14.0%, and Mo: 1.8. -2.3%, N: 0.05-0.15% , Mn: 1.0% or less, Si: 1.0% or less, and a wire rod made of stainless steel comprising the balance of Fe and inevitable impurities. Obtained by cold heading.
Of the elements blended as these essential components, nickel (Ni) improves corrosion resistance, chromium (Cr) improves corrosion resistance and increases toughness, and molybdenum (Mo) improves cold workability. Nitrogen (N) plays a role in increasing hardness and corrosion resistance.
[0009]
Stainless steel having the above composition has corrosion resistance superior to SUS304, drawability equal to or higher than that of SUS304, forging, martensite structure, and quenching hardenability. .
[0010]
The driving rivet according to the present invention is manufactured using a martensitic stainless steel having the above composition as a material, and the manufacturing method will be described below with reference to the flowchart of FIG.
First, a martensitic stainless steel wire having the above composition is drawn, and then processed into a shape as a driving rivet by cold heading.
Then, the obtained driving rivet is quenched under a nitrogen atmosphere, and after being cooled by nitrogen, a tempering treatment is performed under an atmospheric pressure atmosphere (air atmosphere).
[0011]
The quenching and tempering conditions are as follows: nitrogen pressure: less than 0.1 atm, temperature: 1050 to 1150 ° C., time: 5 to 15 minutes. 1 atm, temperature: 200-240 ° C., time: 2-3 hours.
Here, the quenching treatment is performed in a nitrogen reduced-pressure atmosphere of less than 0.1 atm to prevent the decomposition and outflow of chromium (Cr), and the quenching conditions are set to 1050 to 1150 ° C. × 5 to 15 minutes. This is to prevent surface nitriding as much as possible and to obtain a hardness of HRC 53 or more. The nitrogen pressure is preferably set to 0.05 atm or less.
The tempering condition is set to 200 to 240 ° C. × 2 to 3 hours in order to make the rivet more tough and to make the hardness HRC 49 or more.
[0012]
As specific condition values, the conditions of 1150 ° C. for 10 minutes in a nitrogen atmosphere of 0.05 atm for quenching treatment and 220 ° C. for 3 hours in tempering treatment at atmospheric pressure can be exemplified. The driving rivet treated in the above has a hardness of Hv540.
[0013]
After the above-mentioned quenching and tempering, barrel polishing is performed to smooth the surface, and then passivation is performed.
As a method of the passivation treatment, a method of dipping the rivet after barrel polishing in a concentrated nitric acid solution for about several minutes can be exemplified, but it is not particularly limited to this method.
Since the driving rivet according to the present invention forms an oxide film on the surface by performing the passivation treatment as described above, it has extremely excellent corrosion resistance without performing plating treatment as in a conventional rivet. Become. Therefore, there is no danger of hydrogen embrittlement, and the plating cost can be reduced.
[0014]
【Example】
Hereinafter, the effects of the present invention will be clarified by showing examples and comparative examples of the driving rivet according to the present invention. However, the present invention is not limited at all by the following examples.
(Manufacture of Example Rivet)
Driving rivets were produced by using a martensitic stainless steel containing the components shown in Table 1 and the balance Fe and unavoidable impurities, and omitting the final passivation process from the working process shown in FIG.
The quenching treatment was performed at 1150 ° C. for 10 minutes under a nitrogen atmosphere of 0.05 atm, and the tempering treatment was performed at 220 ° C. for 3 hours under atmospheric pressure.
[Table 1]
(Production of rivets for comparative example)
C : 0.32 to 0.38%, Mn: 0.60 to 0.90%, Si: 0.10 to 0.35% , and a wire made of S35C material consisting of the balance Fe and inevitable impurities. A driving rivet having the same shape as that of the example was manufactured by the processing steps shown in FIG.
[0016]
(Comparative test)
The driving rivets of the example and the comparative example were compared in terms of allowable caulking plate thickness, hardness, corrosion resistance, cold headability, fastening strength, and toughness. Table 2 shows the results. The shaft diameters of the driving rivets of the example and the comparative example are both φ4 mm.
[Table 2]
The allowable plate thickness is evaluated by the thickness of the member to be fastened (plate material of SS400), and the hardness is measured by the Vickers hardness tester at the center position of the leg surface of the rivet (the position indicated by the horizontal arrow in FIG. 1). did.
The corrosion resistance was evaluated by a salt spray test (JIS Z 2371), and the cold forging property was evaluated by the ease of cold forging.
For the fastening strength, the tensile strength and the shear strength for separating the two fastened members (SS400, thickness 1.6 mm × 2 pieces) were measured. (R dimension in FIG. 2) was measured.
[0018]
From the results shown in Table 2, it can be seen that the driving rivet according to the present invention has a wider range of caulking allowable plate thickness and higher fastening strength (tensile strength and shear strength) than those of the comparative example.
This is because the setting rivet according to the present invention has a high toughness, so that the curl diameter can be increased, whereby the range of the allowable plate thickness is increased, and the fastening strength (tensile strength and shear strength) is also increased. It can be said that.
Further, the driving rivet according to the present invention is excellent also in corrosion resistance, and the corrosion resistance can be further improved by performing a passivation treatment.
[0019]
【The invention's effect】
As described above, according to the driving rivet and the method for manufacturing the same according to the present invention , C : 0.1 to 0.2%, Mn: 1.0% or less, Si: 1.0% or less, Ni: 1 0.0 to 2.5%, Cr: 12.0 to 14.0%, Mo: 1.8 to 2.3%, N: 0.05 to 0.15%, the balance being Fe and unavoidable impurities Since a driving rivet is manufactured by cold forging a wire rod made of an alloy steel made of, a driving rivet excellent in corrosion resistance, strength, and toughness can be obtained.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view of a driving rivet according to the present invention.
FIG. 2 is a diagram showing a state where two fastening members are swaged and fastened using the driving rivet according to the present invention.
FIG. 3 is a flowchart showing a method for manufacturing a driving rivet according to the present invention.
FIG. 4 is a flowchart illustrating a method for manufacturing a driving rivet according to a comparative example.
[Explanation of symbols]
1 Driving
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16308899A JP3572350B2 (en) | 1999-06-09 | 1999-06-09 | Driving rivet and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16308899A JP3572350B2 (en) | 1999-06-09 | 1999-06-09 | Driving rivet and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000345304A JP2000345304A (en) | 2000-12-12 |
| JP3572350B2 true JP3572350B2 (en) | 2004-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16308899A Expired - Fee Related JP3572350B2 (en) | 1999-06-09 | 1999-06-09 | Driving rivet and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111571143A (en) * | 2020-05-26 | 2020-08-25 | 王丽 | Self-plugging rivet manufacturing process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5358875B2 (en) * | 2005-04-28 | 2013-12-04 | アイシン・エィ・ダブリュ株式会社 | Steel member cooling method |
| EP1889929B1 (en) | 2005-09-26 | 2013-01-02 | Aisin Aw Co., Ltd. | Method for the manufacture of carburized steel members . |
| CN116194600A (en) * | 2020-09-25 | 2023-05-30 | 美蓓亚三美株式会社 | High corrosion-resistant stainless steel member and method for producing same, heat treatment method for stainless steel member, and rolling bearing and method for producing same |
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1999
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111571143A (en) * | 2020-05-26 | 2020-08-25 | 王丽 | Self-plugging rivet manufacturing process |
| CN111571143B (en) * | 2020-05-26 | 2022-03-04 | 王丽 | Self-plugging rivet manufacturing process |
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| JP2000345304A (en) | 2000-12-12 |
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