JPH10166180A - Manufacture of flux-cored seamless wire for welding stainless steel - Google Patents
Manufacture of flux-cored seamless wire for welding stainless steelInfo
- Publication number
- JPH10166180A JPH10166180A JP34653096A JP34653096A JPH10166180A JP H10166180 A JPH10166180 A JP H10166180A JP 34653096 A JP34653096 A JP 34653096A JP 34653096 A JP34653096 A JP 34653096A JP H10166180 A JPH10166180 A JP H10166180A
- Authority
- JP
- Japan
- Prior art keywords
- wire
- heat treatment
- temperature
- stainless steel
- flux
- 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.)
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- Arc Welding In General (AREA)
- Nonmetallic Welding Materials (AREA)
- Metal Extraction Processes (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、オーステナイト系
ステンレス鋼を外皮とするステンレス鋼溶接用シームレ
スフラックス入りワイヤの製造方法に係り、さらに詳し
くは、ワイヤの伸線時において断線することなく線引き
が可能で、特に１．０mmφ、０．９mmφ、０．８mmφ等
の細径ワイヤを生産性よく容易に得ることのできるステ
ンレス鋼溶接用シームレスフラックス入りワイヤの製造
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 a seamless flux-cored wire for welding stainless steel having an austenitic stainless steel as its outer skin, and more particularly to a method for drawing a wire without breaking the wire during wire drawing. In particular, the present invention relates to a method for manufacturing a stainless steel welding seamless flux cored wire capable of easily obtaining a fine wire having a diameter of 1.0 mmφ, 0.9 mmφ, 0.8 mmφ or the like with good productivity.
【０００２】[0002]
【従来の技術】従来、オーステナイト系ステンレス鋼を
外皮とするステンレス鋼溶接用シームレスフラックス入
りワイヤの製造では、フラックスを充填後１．０mmφ、
０．９mmφ、０．８mmφ等の製品径まで仕上げる間、１
０５０〜１１５０℃の温度でワイヤを溶体化熱処理し、
伸線により加工硬化した外皮を軟化させ、更に伸線加工
するというサイクルを数回繰り返している。しかしなが
ら伸線中に断線するという問題があり、この改善方法と
して充填するフラックスの粒度を制限する技術が特開昭
６３−４９３９７号公報に、また熱処理を施すことによ
って外皮のビッカース硬度を３００以下に維持して伸線
を行う技術が特開昭５９−１３０６９８号公報にそれぞ
れ開示されている。しかしながら、いずれも断線防止に
関し断線トラブルを完全に解消するまでには至らなかっ
た。2. Description of the Related Art Conventionally, in the production of a seamless flux cored wire for stainless steel welding using an austenitic stainless steel as an outer skin, 1.0 mmφ after flux filling,
While finishing to the product diameter of 0.9mmφ, 0.8mmφ, etc., 1
Solution heat treating the wire at a temperature of 0.050 to 1150 ° C.,
The cycle of softening the outer hardened by wire drawing and further wire drawing is repeated several times. However, there is a problem that the wire breaks during drawing, and as a method for improving this, Japanese Patent Application Laid-Open No. 63-49397 discloses a technique for limiting the particle size of the flux to be filled, and the Vickers hardness of the outer skin is reduced to 300 or less by heat treatment. A technique for performing the wire drawing while maintaining is disclosed in Japanese Patent Application Laid-Open No. Sho 59-130698. However, none of them has been completely resolved to prevent disconnection.
【０００３】[0003]
【発明が解決しようとする課題】本発明はオーステナイ
ト系ステンレス鋼を外皮とするステンレス鋼溶接用シー
ムレスフラックス入りワイヤの製造において、伸線によ
り加工硬化したワイヤを８５０〜９５０℃でワイヤ径
（ｍｍ）×３０〜４０秒間熱処理した後、−８０〜０℃
で１．０mmφ〜０．８mmφの細径を生産性よく伸線する
ことを特徴とするステンレス鋼溶接用シームレスフラッ
クス入りワイヤの製造方法の提供にある。SUMMARY OF THE INVENTION The present invention relates to the production of a seamless flux-cored wire for welding stainless steel using austenitic stainless steel as an outer skin. After heat treatment for 30 to 40 seconds, -80 to 0 ° C
The present invention provides a method for producing a seamless flux cored wire for stainless steel welding, characterized in that a small diameter of 1.0 mm to 0.8 mm is drawn with high productivity.
【０００４】[0004]
【課題を解決するための手段】本発明の要旨とするとこ
ろは、オーステナイト系ステンレス鋼を外皮とするステ
ンレス鋼溶接用シームレスフラックス入りワイヤの製造
において、伸線により加工硬化したワイヤを８５０〜９
５０℃でワイヤ径（ｍｍ）×３０〜４０秒間熱処理した
後、−８０〜０℃で１．０mmφ〜０．８mmφの細径を生
産性よく伸線することを特徴とするステンレス鋼溶接用
シームレスフラックス入りワイヤの製造方法にある。The gist of the present invention is to produce a seamless flux-cored wire for welding stainless steel having an austenitic stainless steel as an outer skin, and to apply 850 to 9 wires hardened by drawing.
After heat treatment at 50 ° C for 30 to 40 seconds, wire diameter (1.0mmφ to 0.8mmφ) is drawn with good productivity at -80 to 0 ° C for stainless steel welding. A method for manufacturing a flux-cored wire.
【０００５】[0005]
【発明の実施の形態】本発明のフラックス入りワイヤと
は、図１に示すような断面形状のシームレスワイヤで、
パイプから成る外皮１によって充填フラックス２を被包
したものである。次に本発明の根幹とも言える熱処理温
度と伸線温度について、実験結果によって説明する。表
１に示す外皮及び充填フラックスからなる５mmφのステ
ンレス鋼溶接用シームレスフラックス入りワイヤを作
り、３．５mmφまで減面率約５０％の伸線加工を行った
後、表２に示す温度にて１２０秒熱処理を行い、−１０
０℃から１００℃までの各温度における各ワイヤの引張
強さ及び伸びを調査した。ワイヤの熱処理温度、伸線温
度、引張強さとの関係を示す測定結果を図２に、ワイヤ
の熱処理温度、伸線温度と伸びとの関係を示す測定結果
を図３に示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS The flux-cored wire of the present invention is a seamless wire having a sectional shape as shown in FIG.
The filling flux 2 is encapsulated by a shell 1 made of a pipe. Next, the heat treatment temperature and the wire drawing temperature, which can be said to be the basis of the present invention, will be described based on experimental results. A seamless flux-cored wire for stainless steel welding of 5 mmφ consisting of the outer skin and the filling flux shown in Table 1 was prepared, and after being drawn to 3.5 mmφ with a reduction in area of about 50%, it was heated at a temperature shown in Table 2 at 120 ° C. Second heat treatment, -10
The tensile strength and elongation of each wire at each temperature from 0 ° C to 100 ° C were investigated. FIG. 2 shows the measurement results showing the relationship between the heat treatment temperature, the drawing temperature, and the tensile strength of the wire, and FIG. 3 shows the measurement results showing the relationship between the heat treatment temperature, the drawing temperature, and the elongation of the wire.
【０００６】[0006]
【表１】 [Table 1]
【０００７】[0007]
【表２】 [Table 2]
【０００８】その結果、ワイヤの引張強さは試験温度が
低温になるに従い高い値を示したが、何れの試験温度に
おいても９００℃による熱処理材は１０５０℃より高い
値を示した。これは伸線加工によりワイヤ外皮には加工
誘起マルテンサイトが析出し、その後１０５０℃の熱処
理により安定したオーステナイト組織となるのに対し、
９００℃では加工誘起マルテンサイトが消失し安定オー
ステナイト組織となる変態過程のためにワイヤは高い強
度を示したと考えられる。一方、ワイヤの伸びは１０５
０℃による熱処理材が引張強さが高くなるに従い低下傾
向を示したが、９００℃の熱処理材は−２０℃の試験温
度近辺で伸びが向上する傾向が認められた。すなわち、
高い強度で高い伸びを示す塑性加工温度がシームレスフ
ラックス入りワイヤにあることを見いだした。本発明者
らはこの結果に着目し、伸線加工の引き抜きに必要なワ
イヤの引張強さと減面加工に必要な伸びが、特定の熱処
理温度と特定の温度での伸線加工により両立して得られ
るという知見を得た。As a result, the tensile strength of the wire showed a higher value as the test temperature became lower, but the heat-treated material at 900 ° C. showed a value higher than 1050 ° C. at any test temperature. This is because work-induced martensite precipitates in the wire sheath by wire drawing, and then becomes a stable austenite structure by heat treatment at 1050 ° C.
At 900 ° C., it is considered that the wire exhibited high strength due to the transformation process in which the work-induced martensite disappeared and a stable austenite structure was formed. On the other hand, the wire elongation is 105
Although the heat-treated material at 0 ° C. showed a tendency to decrease as the tensile strength increased, the heat-treated material at 900 ° C. showed a tendency for the elongation to improve near the test temperature of −20 ° C. That is,
It has been found that there is a plastic working temperature showing a high strength and a high elongation in the seamless flux cored wire. The present inventors have paid attention to this result, and the tensile strength of the wire required for drawing in wire drawing and the elongation required for surface reduction processing are compatible with a specific heat treatment temperature and a specific temperature for wire drawing. The knowledge that it can be obtained was obtained.
【０００９】以下に本発明の製造条件の限定理由につい
て述べる。まず熱処理温度は８５０℃未満では加工硬化
したワイヤは充分な焼鈍の効果は得られず、熱処理後の
僅かな減面率の伸線によっても再度加工効果を起こし、
断線の発生が著しい。熱処理温度が９５０℃を超えると
外皮が軟化しすぎ引張強さの低下、充填フラックス中の
金属材が突き刺さる等により、熱処理後の伸線によって
断線の発生は低減できない。従って熱処理温度を８５０
〜９５０℃とする。また熱処理時間は、ワイヤ径（ｍ
ｍ）の３０倍（秒）未満では伸線加工に充分な外皮の軟
化は得られず、ワイヤ径（ｍｍ）の４０倍（秒）を超え
ると外皮の軟化が進み充分な引張強さが得られないた
め、ワイヤ径（ｍｍ）の３０〜４０倍（秒）とする。The reasons for limiting the manufacturing conditions of the present invention will be described below. First, if the heat treatment temperature is lower than 850 ° C., the work-hardened wire cannot obtain a sufficient annealing effect, and the work effect is caused again by the drawing with a small area reduction rate after the heat treatment.
Disconnection is remarkable. If the heat treatment temperature exceeds 950 ° C., the outer skin is too soft, the tensile strength is reduced, and the metal material in the filling flux is pierced. Therefore, the heat treatment temperature is set to 850.
~ 950 ° C. The heat treatment time is determined by the wire diameter (m
If the length is less than 30 times (m), the outer skin cannot be sufficiently softened for wire drawing, and if it exceeds 40 times (s) the wire diameter (mm), the outer skin will be softened and sufficient tensile strength will be obtained. Therefore, it is set to 30 to 40 times (second) the wire diameter (mm).
【００１０】次に伸線温度は−８０℃未満ではワイヤの
引張強さは向上するものの、伸びの低下により断線の発
生傾向は高まる。伸線温度が０℃を超えるとワイヤの引
張強さ及び伸びは低く断線の低減はできない。従って伸
線温度を−８０〜０℃とする。[0010] Next, when the drawing temperature is less than -80 ° C, the tensile strength of the wire is improved, but the tendency of breakage is increased due to the decrease in elongation. If the wire drawing temperature exceeds 0 ° C., the tensile strength and elongation of the wire are low, and the wire breakage cannot be reduced. Therefore, the drawing temperature is set to -80 to 0 ° C.
【００１１】ステンレス鋼溶接用フラックス入りワイヤ
は、その溶接能率の高さ、適用性の広さ等から被覆アー
ク溶接棒に替わり需要が一番多く、そのワイヤ径は１．
２mmφが一般的である。しかし、従来ティグ溶接等を用
いている板厚１．５mm等の薄板溶接には１．０mmφ〜
０．８mmφの細径が必要となるが、該ワイヤは細径のう
えに薄肉の外皮となるため、断線が多く生産性は悪かっ
た。そこで本発明技術の適用により、多大な効果を得る
事が出来るのは細径ワイヤであるため、ワイヤ径は１．
０mmφ〜０．８mmφに限定する。Flux-cored wires for stainless steel welding are the most popular alternatives to coated arc welding rods due to their high welding efficiency and wide applicability.
2 mmφ is common. However, for thin plate welding such as 1.5 mm thick using conventional TIG welding, 1.0 mm
Although a small diameter of 0.8 mmφ is required, the wire has a small diameter and a thin outer skin, so that many wires are broken and productivity is poor. Therefore, since it is a small diameter wire that can obtain a great effect by applying the technology of the present invention, the wire diameter is 1.
Limited to 0 mmφ to 0.8 mmφ.
【００１２】[0012]
【実施例】表３に示す外皮及び充填フラックスからなる
５mmφのステンレス鋼溶接用シームレスフラックス入り
ワイヤを作り、従来の方法にて３．５mmφと２．０mmφ
での熱処理を行いながら１．２mmφまで伸線した後、４
０秒の熱処理及び伸線温度を変化させた２４種類のワイ
ヤを各１００ｋｇを０．８mmφまで伸線し、その過程で
の断線の有無を調査した。１．２mmφから０．８mmφへ
の伸線ダイス構成は、いずれのワイヤも１．１５→１．
０５→０．９５→０．８５→０．８mmφとし、３００ｍ
／ｍｉｎの伸線速度で仕上げた。また、伸線はダイスの
前に冷却及び加熱層を設け、温度管理された雰囲気で実
施した。EXAMPLE A seamless flux-cored wire for stainless steel welding of 5 mmφ consisting of a shell and a filling flux shown in Table 3 was prepared, and 3.5 mmφ and 2.0 mmφ were produced by a conventional method.
After drawing to 1.2mmφ while performing heat treatment in
Twenty-four kinds of wires were heat-treated for 0 seconds and the wire drawing temperature was changed, and 100 kg of each wire was drawn to 0.8 mmφ, and the presence or absence of breakage in the process was examined. The configuration of the wire drawing die from 1.2 mmφ to 0.8 mmφ is 1.15 → 1.
05 → 0.95 → 0.85 → 0.8mmφ, 300m
/ Min at a wire drawing speed of / min. The wire was drawn in a temperature-controlled atmosphere by providing a cooling and heating layer before the die.
【００１３】[0013]
【表３】 [Table 3]
【００１４】その結果は表４に示す通りで、比較例の熱
処理温度が高いワイヤＮｏ．１３，１５，１６、熱処理
温度及び伸線温度の高いワイヤＮｏ．１４、伸線温度の
低いワイヤＮｏ．１７，１９，２４、伸線温度の高いワ
イヤＮｏ．１８，２２，２３、熱処理温度が低いワイヤ
Ｎｏ．２０、熱処理温度が低く伸線温度の高いワイヤＮ
ｏ．２１は断線が発生した。これらに対し、熱処理温度
及び伸線温度が適正な本発明ワイヤＮｏ．１〜１２のワ
イヤは、断線無く極めて良好に細径の伸線が行えた。The results are as shown in Table 4. The wire No. of the comparative example having a high heat treatment temperature was used. No. 13, 15, 16, wire No. with high heat treatment temperature and wire drawing temperature. 14, wire No. with low drawing temperature. 17, 19, 24, wire no. 18, 22, 23, wire No. with low heat treatment temperature. 20, wire N with low heat treatment temperature and high wire drawing temperature
o. In No. 21, disconnection occurred. On the other hand, the wire No. of the present invention in which the heat treatment temperature and the drawing temperature are appropriate. The wires of Nos. 1 to 12 could be drawn very finely without breaking.
【００１５】[0015]
【表４Ａ】 [Table 4A]
【００１６】[0016]
【表４Ｂ】 [Table 4B]
【００１７】[0017]
【発明の効果】以上のように本発明は、オーステナイト
系ステンレス鋼を外皮とするステンレス鋼溶接用シーム
レスフラックス入りワイヤの製造において、ワイヤの伸
線時に断線することなく線引きを可能としたもので、特
に従来断線が頻発し工業的に採算が合わなかった１．０
mmφ、０．９mmφ、０．８mmφ等の細径ワイヤの生産性
を高めることを可能ならしめ、工業の発展に大きく貢献
するものである。As described above, the present invention enables the production of a seamless flux cored wire for stainless steel welding using an austenitic stainless steel as an outer skin without breaking the wire when the wire is drawn. In particular, the conventional disconnection frequently occurred and industrially unprofitable.
The present invention makes it possible to increase the productivity of small diameter wires such as mmφ, 0.9mmφ, 0.8mmφ, etc., and greatly contributes to the development of industry.
【図１】各種フラックス入りワイヤの断面形状を示す。FIG. 1 shows cross-sectional shapes of various flux-cored wires.
【図２】ワイヤの熱処理温度、伸線温度、引張強さとの
関係を示す測定結果。FIG. 2 is a measurement result showing a relationship among a heat treatment temperature, a wire drawing temperature, and a tensile strength of a wire.
【図３】ワイヤの熱処理温度、伸線温度と伸びとの関係
を示す測定結果。FIG. 3 is a measurement result showing a relationship between a heat treatment temperature, a drawing temperature, and elongation of a wire.
１ 外皮 ２ 充填フラックス 1 Skin 2 Filling flux
─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成９年３月１０日[Submission date] March 10, 1997
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００７[Correction target item name] 0007
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【０００７】[0007]
【表２】 [Table 2]
フロントページの続き (72)発明者 渡邊 大祐 千葉県富津市新富20−１ 新日本製鐵株式 会社技術開発本部内 (72)発明者 石坪 紀久雄 千葉県富津市新富20−１ 新日本製鐵株式 会社技術開発本部内Continued on the front page (72) Inventor Daisuke Watanabe 20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel Corporation Technology Development Division (72) Inventor Kikuo Ishitsubo 20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel Corporation Company Technology Development Division
Claims (1)
するステンレス鋼溶接用シームレスフラックス入りワイ
ヤの製造において、伸線により加工硬化したワイヤを８
５０〜９５０℃でワイヤ径（ｍｍ）×３０〜４０秒間熱
処理した後、−８０〜０℃で１．０mmφ〜０．８mmφの
細径を生産性よく伸線することを特徴とするステンレス
鋼溶接用シームレスフラックス入りワイヤの製造方法。1. In the production of a seamless flux-cored wire for welding stainless steel having an austenitic stainless steel as an outer skin, a wire work-hardened by drawing is replaced with 8 wires.
Stainless steel welding characterized by being heat-treated at 50 to 950 ° C. for 30 to 40 seconds at a wire diameter (mm) and then drawn at −80 to 0 ° C. with a small diameter of 1.0 mm to 0.8 mm with good productivity. Method of manufacturing seamless flux cored wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34653096A JPH10166180A (en) | 1996-12-11 | 1996-12-11 | Manufacture of flux-cored seamless wire for welding stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34653096A JPH10166180A (en) | 1996-12-11 | 1996-12-11 | Manufacture of flux-cored seamless wire for welding stainless steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10166180A true JPH10166180A (en) | 1998-06-23 |
Family
ID=18384054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34653096A Withdrawn JPH10166180A (en) | 1996-12-11 | 1996-12-11 | Manufacture of flux-cored seamless wire for welding stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10166180A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102172653A (en) * | 2011-01-18 | 2011-09-07 | 徐州旭昇金属科技有限公司 | Production process of metal microfilament for weaving |
| CN104668820A (en) * | 2015-02-12 | 2015-06-03 | 江苏省沙钢钢铁研究院有限公司 | Production method of heat-resistant steel welding wire |
| WO2018043268A1 (en) * | 2016-08-30 | 2018-03-08 | 株式会社神戸製鋼所 | Seamless wire containing welding flux |
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1996
- 1996-12-11 JP JP34653096A patent/JPH10166180A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102172653A (en) * | 2011-01-18 | 2011-09-07 | 徐州旭昇金属科技有限公司 | Production process of metal microfilament for weaving |
| CN104668820A (en) * | 2015-02-12 | 2015-06-03 | 江苏省沙钢钢铁研究院有限公司 | Production method of heat-resistant steel welding wire |
| CN104668820B (en) * | 2015-02-12 | 2017-01-04 | 江苏省沙钢钢铁研究院有限公司 | Production method of heat-resistant steel welding wire |
| WO2018043268A1 (en) * | 2016-08-30 | 2018-03-08 | 株式会社神戸製鋼所 | Seamless wire containing welding flux |
| CN109475985A (en) * | 2016-08-30 | 2019-03-15 | 株式会社神户制钢所 | Seamless flux-cored wire is used in welding |
| EP3508302A4 (en) * | 2016-08-30 | 2020-02-19 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Seamless wire containing welding flux |
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