JPH0464705A - Drill screw made of austenite group stainless steel and manufacture thereof - Google Patents
Drill screw made of austenite group stainless steel and manufacture thereofInfo
- Publication number
- JPH0464705A JPH0464705A JP17816990A JP17816990A JPH0464705A JP H0464705 A JPH0464705 A JP H0464705A JP 17816990 A JP17816990 A JP 17816990A JP 17816990 A JP17816990 A JP 17816990A JP H0464705 A JPH0464705 A JP H0464705A
- Authority
- JP
- Japan
- Prior art keywords
- drill
- processing
- stainless steel
- screw
- hardness
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 229910001220 stainless steel Inorganic materials 0.000 title abstract description 4
- 229910001566 austenite Inorganic materials 0.000 title abstract description 3
- 239000010935 stainless steel Substances 0.000 title description 3
- 239000000463 material Substances 0.000 claims abstract description 19
- 238000005520 cutting process Methods 0.000 claims abstract description 12
- 238000005260 corrosion Methods 0.000 claims abstract description 10
- 230000007797 corrosion Effects 0.000 claims abstract description 10
- 238000004080 punching Methods 0.000 claims abstract description 10
- 238000010273 cold forging Methods 0.000 claims abstract description 3
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 241000277275 Oncorhynchus mykiss Species 0.000 claims 1
- 238000005553 drilling Methods 0.000 claims 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 7
- 239000002253 acid Substances 0.000 abstract description 4
- 230000032683 aging Effects 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract description 3
- 238000005498 polishing Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract 3
- 238000005096 rolling process Methods 0.000 description 11
- 239000011265 semifinished product Substances 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 238000005482 strain hardening Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 238000005121 nitriding Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Landscapes
- Forging (AREA)
Abstract
Description
【発明の詳細な説明】
［技術分野］
本発明は先端に搾孔するためのドリル部を有する耐熱、
耐食、耐錆性に優れたオーステナイト系ステンレス鋼の
ドリルねしとその製造方法。[Detailed Description of the Invention] [Technical Field] The present invention relates to a heat-resistant,
An austenitic stainless steel drill bit with excellent corrosion and rust resistance and its manufacturing method.
［背景技術］
従来のこの種のねじはドリル部だけを別の材質にて焼入
れ硬化したものを押入して（第８図に示す）、又は耐熱
、耐食、耐錆性にはオーステナイト系に到底及ばないが
マルテンサイト系に焼入れで使用されていた。[Background technology] Conventional screws of this type are made by pressing a hardened drill part made of a different material (as shown in Figure 8), or by using a material that is far superior to austenitic in terms of heat resistance, corrosion resistance, and rust resistance. Although not as good as martensitic materials, it was used for quenching.
浸炭、窒化すればもろいＣｒの炭化物、窒化物が生じる
ためぜい化する。しかしＮ１はＣやＮ、と化合しない。Carburizing and nitriding produce brittle Cr carbides and nitrides, resulting in embrittlement. However, N1 does not combine with C or N.
又Ｃｒの炭化物、窒化物ができると酸化に耐え保護被膜
を生じるＣｒが減少するので酸化にも悪くなる。この点
Ｃｒ系ステンレスは浸炭。Furthermore, when Cr carbides and nitrides are formed, Cr that resists oxidation and forms a protective film is reduced, making it bad for oxidation. In this respect, Cr stainless steel is carburized.
窒化に弱い。耐熱であるがＮｊを含むオーステナイト系
は強い。Ｎｉの多い物はど良いので高Ｎｉのオーテナイ
ト系が使用されている程度で、硬度がＨＲＣ４５以上は
不可能とされていたのでオーステナイト系ステンレス鋼
のドリルスクリュウで同一材料では不可能とされていた
。Weak against nitriding. Although heat resistant, austenite containing Nj is strong. Items with a high Ni content are not good, so a high Ni austenitic type is used, and it was considered impossible to have a hardness of HRC45 or higher, so it was considered impossible to use the same material as an austenitic stainless steel drill screw. .
耐錆性に優れており切削性の良いドリルねしであり、又
、安価に多量に生産できる製造方法を提供するにある。To provide a drill bit with excellent rust resistance and good machinability, and a manufacturing method that can be produced in large quantities at low cost.
［発明の開示］ 本発明はオーステナイト系ステンレス鋼で耐酸。[Disclosure of invention] The present invention is made of austenitic stainless steel and is acid resistant.
耐熱、ｊｔ食、耐錆性に優れている。ドリル刃先の硬度
がＦＩｖ５００． または）ＩＲＣ４９以上であり切
削性の優れているドリルねじと、その製造方法によるも
ので１表１に示すように焼入れ硬化性は無しで、焼き入
れ硬化の望めない金属や、炭素、及び窒素を［発明の目
的］
本発明は叙述の点に鑑み成されたものであって。Excellent heat resistance, JT corrosion and rust resistance. The hardness of the drill cutting edge is FIv500. Or) A drill screw with IRC49 or higher and excellent machinability, and its manufacturing method.1 As shown in Table 1, it has no quench hardenability and cannot be used with metals, carbon, or nitrogen that cannot be quench hardened. [Object of the Invention] The present invention has been made in view of the points stated above.
本発明の目的とするところは非磁性で、低温、高温にお
ける性質も優秀で耐酸性、耐熱性、耐食性。The object of the present invention is to be non-magnetic, have excellent properties at low and high temperatures, and have acid resistance, heat resistance, and corrosion resistance.
拡散浸透させて硬化させるものも、いろいろ研究され発
明されているが、熱処理を行えば耐酸、耐熱、耐食、耐
錆性のオーステナイト系ステンレスｓノ待ｔａｔが９時
効性ステンレスに転じて特別な特性の差が少なくなって
くる。又、刃先だけ金属や炭素、又は窒素を拡散浸透さ
せると云う技術も研究されているが、完全なるものはま
だ開発されておらず、耐食性に優れたオーステナイト系
のドリルねじの、必要性が云われているが解決方法がな
く第８図の様なのが開発されている程度である。Various studies and inventions have been made of materials that harden by diffusion permeation, but if heat treatment is performed, the acid-resistant, heat-resistant, corrosion-resistant, and rust-resistant austenitic stainless steel can be transformed into an aging stainless steel with special properties. The difference becomes smaller. In addition, research is being conducted on technology that allows metal, carbon, or nitrogen to diffuse and permeate only the cutting edge, but a perfect one has not yet been developed, and there is a strong need for austenitic drill screws with excellent corrosion resistance. However, there is no solution to this problem, and only the one shown in Figure 8 has been developed.
本発明は１以上いろいろの欠点を説明したがこの欠点を
補い安価で、多量に供給するにある。The present invention overcomes one or more of the drawbacks described above and is inexpensive and available in large quantities.
次に製造方法を説明するが、要旨は冷間鍛造加工を用い
て、加工硬化によりドリル部をねじ部より硬くシ、ドリ
ル刃の硬度がＨｖ５００． またはＨＲＣ４９以上を
有する特許請求範囲第１項記載の、耐食性に優れたドリ
ルスクリューねじの製造方法であり。Next, the manufacturing method will be explained, but the gist is that cold forging is used to make the drill part harder than the threaded part by work hardening, and the hardness of the drill blade is Hv500. Alternatively, there is provided a method for manufacturing a drill screw having excellent corrosion resistance, as set forth in claim 1, having an HRC of 49 or more.
実施例によって詳細に説明にする。This will be explained in detail by way of examples.
第１図は、先頭のドリルねじの半製品の図であり１図中
のｄはねじを切る前のねじ部の軸の直径である。第２図
はポンチングマシンにてのドリル部成型が成された図で
、軸部２の先端がドリル部に値する。第４図は六角フラ
ンジ頭のドリルねじの半製品の図であり、第１図及び第
４図のドリルねじの半製品の機械的性質が１重要なる特
許用件である。即ち、オーステナイト系ステンレス鋼の
は冷間加工により加工硬化するが、特に高硬度を得られ
るもの、又は高硬度で、かつ非磁性のもの等の材料で、
−船釣には下記の通り。FIG. 1 is a diagram of a semi-finished product of the first drill screw, and d in FIG. 1 is the diameter of the shaft of the threaded portion before cutting the thread. Fig. 2 shows the drill part formed by a punching machine, and the tip of the shaft part 2 corresponds to the drill part. FIG. 4 is a diagram of a semi-finished drill screw with a hexagonal flange head, and the mechanical properties of the semi-finished drill screw shown in FIGS. 1 and 4 are important patent matters. That is, austenitic stainless steel is work hardened by cold working, but materials that can obtain particularly high hardness, or materials that are highly hard and non-magnetic,
-For boat fishing, please follow the instructions below.
３０４Ｎ、 １８ｃｒ −８Ｎｉ −０，２
Ｎ３０４Ｎ＊ １８ｃｒ ８ Ｎ＋
０．２Ｎ Ｎｂ大同ＤＳＮ６ １８Ｃｒ−１２
Ｎｉ −１５Ｍｎ −０，８Ｓｉ −Ｎ３０１
１７Ｃｒ −７Ｎｉ −Ｌ Ｃ３０２］６Ｃｒ −
２Ｎｉ −８Ｍｎ −２Ｃｕ −０，ｌＮ５０４−７Ｂ
１８Ｃｒ −８Ｎｉ −Ｉ Ｍｎと、
高硬度非磁性材を色々研究されているが、第１図及び第
４図の半製品の機械的性質がＴｓ８０ｋｇｆ／ｍｍ’、
硬度がＨｖ２５０以上を有するように各種の鋼材を伸線
により加工硬化さすか、素材径より太いオーステナイト
系ステンレス鋼にて絞り、付加的にねじの頭部を成形す
る。即ちオーステナイト系ステンレス鋼線の引っ張り、
硬度が高くなると、十字穴加工、又はインデント六角頭
等の頭部の成型加工にて、加工割れ等ができて加工に不
可となるので、鋼線の径を大きくして、ねじ部、及びド
リル部を絞り加工することを特許要件としている半製品
の製造によるものである。304N, 18cr -8Ni -0,2
N304N* 18cr 8 N+
0.2N Nb Daido DSN6 18Cr-12
Ni-15Mn-0,8Si-N301
17Cr -7Ni -L C302]6Cr -
2Ni-8Mn-2Cu-0,lN504-7B
18Cr-8Ni-IMn,
Various studies have been conducted on high hardness non-magnetic materials, but the mechanical properties of the semi-finished products shown in Figures 1 and 4 are Ts80kgf/mm',
Various steel materials are work-hardened by wire drawing to have a hardness of Hv250 or higher, or drawn with austenitic stainless steel that is thicker than the diameter of the material, and the head of the screw is additionally formed. That is, the tension of austenitic stainless steel wire,
If the hardness increases, cracks may occur during cross-hole machining or head shaping such as indented hexagonal heads, making it impossible to process. This is due to the manufacture of semi-finished products whose patent requirement is that the parts be drawn.
次に、ポンチングマシンにて冷間圧造加工を施すことに
より、刃先の硬度がＨｖ４７０と硬度が高くなる。次に
研摩、及びバシペート処理を施し９次に時効処理４００
℃〜５００℃、又は応力除去処理３３０℃〜４００℃に
て保持時間を３０分〜３時間とする熱処理を施し、硬度
をＨｖ２０〜１００高くすることが。Next, by performing cold heading processing using a punching machine, the hardness of the cutting edge becomes as high as Hv470. Next, it is subjected to polishing and bacipate treatment, and then aged to 400 degrees.
The hardness can be increased by 20 to 100 Hv by heat treatment at 330 to 400°C for a holding time of 30 minutes to 3 hours.
第３の特許要件であり、又、加工時の状態では材料中心
部では若干硬さは低下している。この状態のものにさら
に熱処理を施すことにより、硬さはさらに向上し、且つ
中心部まで硬化する効果もある。この時ポンチングマシ
ンにての加工硬化の効果と、熱処理による硬化の合計２
つの相乗硬化により、特許請求範囲ｗ、１項記載のドリ
ル部の硬度は、 Ｈｖ５００．又はＨＲＣ４９１Ｊ上を
有することを特徴とした耐食性に優れたドリルスクリュ
ウねじが得られる製造方法である。This is the third patent requirement, and the hardness is slightly reduced at the center of the material during processing. By further subjecting the material in this state to heat treatment, the hardness is further improved and there is also the effect of hardening the material to the center. At this time, the effect of work hardening in the punching machine and the hardening due to heat treatment total 2
Due to the synergistic hardening, the hardness of the drill part described in Claim W, Item 1 is Hv500. Alternatively, it is a manufacturing method for obtaining a drill screw with excellent corrosion resistance characterized by having HRC491J or above.
次に、このねじ素材１が転造工程に送られ転造ダイス２
５にてねじ切りされる。Next, this screw material 1 is sent to a rolling process and rolled through a rolling die 2.
Threaded at 5.
一対の転造ダス２５は第１０図に示すように相対するよ
うに配置してあり、転造ダイス２５の対向面の上側の約
半分には、ねじ切り部２６を設けてあり。The pair of rolling dies 25 are arranged to face each other as shown in FIG. 10, and a threaded portion 26 is provided in about the upper half of the opposing surface of the rolling die 25.
転造ダイス２５の一端側でねじ切り部２６の下方にはパ
リとり面２７を設けである。ばり６が着いた状態で送ら
れてきたねじ素材１が一対の転造ダイス２５間に供給さ
れ、一方の転造ダイス２５を矢印の方向にすり摺動させ
ることによりねし切り部２６で軸部２にねじ７が切られ
、ねじ切り終わる寸前に第１１図に示すようにばつ取り
面２７でばり６ば切り落とされる。このようにして第３
図、第６図に示すようなドリルねじ１０が形成される。A chamfering surface 27 is provided below the threaded portion 26 on one end side of the rolling die 25. The thread material 1 with the burr 6 attached is fed between a pair of rolling dies 25, and by sliding one of the rolling dies 25 in the direction of the arrow, the screw material 1 is threaded at the thread cutting part 26. A thread 7 is cut in the portion 2, and just before the thread cutting is completed, the burr 6 is cut off by a burr removal surface 27, as shown in FIG. In this way the third
A drill screw 10 as shown in FIG. 6 is formed.
転造ダイス２５でねじ７を切る時までドリル部５にばり
６が付いていて、ねじ切りするときばつ取り面２７で、
ぼり６を落とすのでドリル部５の外周の切り刃縁の切れ
味がよい。つまり第７図のパンチング装置１２でドリル
部５を成形した後、ば９６を除去すると転造工程まで搬
送する工程等でドリル部５の切り刃縁が摩耗して切れ味
がなくなるが、転造工程でばり６を落とすと製品になる
手前の工程でばり６が落とされ切れ味が低下しない。又
、ねじの転造加工と同時にドリル部の予肉を取り落とし
、熱処理を施すことを特徴とする特許請求範囲第３項記
載のオーステナイト系ステンレス鋼のドリルねじの製造
方法。A burr 6 is attached to the drill part 5 until the thread 7 is cut with the rolling die 25, and when the thread is cut, the burr 6 is removed by the burr removal surface 27.
Since the burrs 6 are dropped, the edge of the cutting edge on the outer periphery of the drill part 5 has good sharpness. In other words, if the blade 96 is removed after forming the drill part 5 with the punching device 12 shown in FIG. If the burr 6 is removed, the burr 6 will be removed in the process before it becomes a product, and the sharpness will not deteriorate. The method for manufacturing an austenitic stainless steel drill screw according to claim 3, characterized in that, at the same time as the thread rolling process, the pre-wall of the drill portion is removed and heat treatment is performed.
第１図は、先頭ドリルねじの半製品の正面図。
第２図は、先頭ドリルねじのポンチング加工後の半製品
の正面図。
第３図は、先頭ドリルねじの半製品を転造加工した製品
の正面図である。
第４図は、六角７ランジ頭のドリルねしの半製品。
第５図は六角７ランジ頭ドリルねじのドリル部をポンチ
ング加工後の半製品の図
第６図は六角７ランジ頭のドリルねじの製品の正面図
第７図は、同上のパンチング製造の一部切欠斜視図。
第８図は、従来のドリルスクリュウの正面図及び側面図
。
第９図ばあ、同上の成形部にて成形する状態の断面図。
第１０図、第１１図は同上の転造ダイスの斜視図。
第１２図（ａ ）、（ｂ ）は同上のドリル部の拡大正
面図及び端面図である。FIG. 1 is a front view of a semi-finished product of a top drill screw. FIG. 2 is a front view of the semi-finished product after punching the leading drill screw. FIG. 3 is a front view of a product obtained by rolling a semi-finished product of a leading drill screw. Figure 4 shows a semi-finished drill bit with 7 hexagonal flange heads. Figure 5 is a diagram of a semi-finished product after punching the drill part of a hexagonal 7-lunge head drill screw Figure 6 is a front view of a product of a hexagonal 7-lunge head drill screw Figure 7 is a part of the same punching process as above A cutaway perspective view. FIG. 8 is a front view and a side view of a conventional drill screw. FIG. 9 is a cross-sectional view of a state in which molding is performed in the molding section same as above. FIG. 10 and FIG. 11 are perspective views of the rolling die same as above. FIGS. 12(a) and 12(b) are an enlarged front view and an end view of the same drill part.
Claims (1)
、そのねじ部の先端にドリル部を有するドリルねじで、
ドリル部の刃の表面硬度がＨｖ５００、又はＨＲＣ４９
以上を有することを特徴とした耐食性に優れたドリルス
クリュウねじ。 ［２］オーステナイト系ステンレス鋼線より冷間鍛造で
作られ、頭部とねじ部及びドリル部を有する素材にて、
ドリル刃付加工、及びねじ切り加工をする。素材の機械
的性質は引っ張り強さが８０Ｋｇｆ／ｍｍ＾２以上で、
硬度がＨｖ２７０以上の特性を有することを特徴とした
第１項記載のオーステナイト系ステンレス鋼ドリルねじ
の製造方法。 ［３］第２項記載の素材に、ドリル部をポンチングマシ
ンにて成型等加工し研摩を施して、時効処理（４００℃
〜５００℃）又は、応力除去処理（３３０℃〜４００℃
にて、保持時間３０分〜１８０分とする）のどちらかの
熱処理を施し、硬度を高くすることを特徴とする第１項
記載のオーステナイト系ステンレス鋼のドリルねじの製
造方法。[Scope of Claims] [1] A drill screw having an austenitic stainless steel head and a threaded portion, and a drilled portion at the tip of the threaded portion,
The surface hardness of the drill blade is Hv500 or HRC49
A drill screw with excellent corrosion resistance characterized by having the above characteristics. [2] Made of a material made by cold forging from austenitic stainless steel wire and having a head, threaded part, and drilled part,
Performs drilling processing and thread cutting. The mechanical properties of the material are tensile strength of 80Kgf/mm^2 or more,
2. The method for producing an austenitic stainless steel drill screw according to item 1, characterized in that the screw has a hardness of Hv270 or higher. [3] The drill part of the material described in item 2 is molded using a punching machine, polished, and aged (400°C).
~500℃) or stress relief treatment (330℃~400℃)
2. The method for manufacturing an austenitic stainless steel drill screw according to claim 1, characterized in that the hardness is increased by subjecting the austenitic stainless steel to a heat treatment for a holding time of 30 minutes to 180 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17816990A JPH0464705A (en) | 1990-07-04 | 1990-07-04 | Drill screw made of austenite group stainless steel and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17816990A JPH0464705A (en) | 1990-07-04 | 1990-07-04 | Drill screw made of austenite group stainless steel and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0464705A true JPH0464705A (en) | 1992-02-28 |
Family
ID=16043821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17816990A Pending JPH0464705A (en) | 1990-07-04 | 1990-07-04 | Drill screw made of austenite group stainless steel and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0464705A (en) |
-
1990
- 1990-07-04 JP JP17816990A patent/JPH0464705A/en active Pending
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