JPH0871643A - Wire feeding device - Google Patents
Wire feeding deviceInfo
- Publication number
- JPH0871643A JPH0871643A JP21642394A JP21642394A JPH0871643A JP H0871643 A JPH0871643 A JP H0871643A JP 21642394 A JP21642394 A JP 21642394A JP 21642394 A JP21642394 A JP 21642394A JP H0871643 A JPH0871643 A JP H0871643A
- Authority
- JP
- Japan
- Prior art keywords
- wire
- carrier
- tension
- roller
- dancer roller
- 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
Landscapes
- Winding, Rewinding, Material Storage Devices (AREA)
- Control Of Heat Treatment Processes (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Tension Adjustment In Filamentary Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、多量の細径ワイヤを連
続的に供給する装置に係り、例えば０．８〜１．６mm径
の細径ステンレス鋼用フラックス入りワイヤの製造過程
における焼鈍工程（加熱工程）を有するワイヤ供給装置
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for continuously supplying a large amount of thin wire, for example, an annealing step in the process of manufacturing a flux-cored wire for stainless steel having a diameter of 0.8 to 1.6 mm. The present invention relates to a wire supply device having a (heating step).
【０００２】[0002]
【従来の技術】ステンレス鋼用フラックス入りワイヤ
は、軟鋼用フラックス入りワイヤに比べ、外皮として用
いるステンレス鋼自体の加工硬化性が大きい上に、目的
とする溶接金属成分との差が大きく、および溶接時に消
耗する合金元素を充填フラックス中に多量含有しなけれ
ばならず、フラックス充填率を高くする必要があり、こ
のことによりステンレス鋼外皮肉厚が薄くなるために、
伸線中にしばしば断線トラブルが生じていた。2. Description of the Related Art Flux-cored wires for stainless steel have a greater work hardening property than the flux-cored wires for mild steel of stainless steel used as an outer shell, and also have a large difference from the intended weld metal components and welding. It is necessary to contain a large amount of alloying elements that are consumed at times in the filling flux, and it is necessary to increase the flux filling rate, which reduces the stainless steel skin thickness,
There were often wire breakage problems during wire drawing.
【０００３】そこで、特開昭５９−１３０６９８号公報
に焼鈍でステンレス鋼外皮の硬さを低くして伸線を行う
技術が開示されているように、０．８〜１．６mm径の細
径ステンレス鋼用フラックス入りワイヤは焼鈍と伸線を
繰り返しながら製造されており、図２にその焼鈍工程へ
のワイヤ供給と巻取り工程を示す。巻取り装置２のキャ
プスタン６で、供給装置１のキャリア３ａに積載したル
ール状ワイヤ４を、回転自在のキャリア３ａから引き出
しながら、７００〜１００℃の焼鈍炉５を通してワイヤ
４を軟化焼鈍し、巻取り装置２側のキャリア３ｂへワイ
ヤ４を順次積層する。この後に図示しないがワイヤ４は
伸線工程で伸線され、ステンレス鋼外皮が加工硬化する
と前記方法で再び焼鈍する。Therefore, as disclosed in Japanese Patent Application Laid-Open No. 59-130698, a technique for reducing the hardness of a stainless steel outer cover by annealing to draw a wire is disclosed. The flux-cored wire for stainless steel is manufactured by repeating annealing and wire drawing, and FIG. 2 shows the wire supply and winding process in the annealing process. With the capstan 6 of the winding device 2, the rule-shaped wire 4 loaded on the carrier 3a of the feeding device 1 is pulled out from the rotatable carrier 3a, and the wire 4 is softened and annealed through an annealing furnace 5 at 700 to 100 ° C. The wire 4 is sequentially laminated on the carrier 3b on the winding device 2 side. After this, although not shown, the wire 4 is drawn in the drawing process, and when the stainless steel outer skin is work hardened, it is annealed again by the above method.
【０００４】しかし、巻取り装置２のキャプスタン６
は、キャリア３ａのワイヤ４を一定の速度で引き出して
いるが、キャリア３ａは回転自在であるので、ワイヤ４
がキャリア３ａに絞り込まれる所定の張力になるまでキ
ャリア３ａは回転しない。この時、焼鈍炉５内において
高温となっているワイヤ４に高い張力がかかるので軟か
くなったワイヤ外皮にくびれが生じたり、ひどい時は焼
鈍炉５内で断線する場合がある。また該ワイヤ外皮にく
びれが生じると次工程の伸線時に断線が生じる。However, the capstan 6 of the winding device 2
Draws the wire 4 of the carrier 3a at a constant speed, but since the carrier 3a is rotatable, the wire 4
The carrier 3a does not rotate until a predetermined tension is applied to the carrier 3a. At this time, since high tension is applied to the wire 4 which is at a high temperature in the annealing furnace 5, the softened wire skin may be constricted or, in severe cases, the wire may be broken in the annealing furnace 5. Further, when the outer skin of the wire is constricted, the wire is broken during the wire drawing in the next step.
【０００５】さらに、キャリア３ａは回転速度が一定で
はないので、キャリア３ａに積載されたループ状ワイヤ
４がキャリア３ａの巻き層へのくい込み、緩みが発生し
てワイヤにからみやもつれが生じ、ワイヤ４をスムーズ
に送給できなくなって、焼鈍炉５内で断線したり、ワイ
ヤ４表面にキズが生じて次工程の伸線時に断線する場合
がある。Further, since the rotation speed of the carrier 3a is not constant, the loop-shaped wire 4 loaded on the carrier 3a bites into the winding layer of the carrier 3a and loosens to cause entanglement or entanglement in the wire, In some cases, the wire 4 may not be smoothly fed, and the wire may be broken in the annealing furnace 5, or the surface of the wire 4 may be damaged and the wire may be broken during the wire drawing in the next step.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、細径ワイヤ
を次工程に安定して供給する装置、例えばステンレス鋼
用フラックス入りワイヤの焼鈍工程で断線やくびれさら
にワイヤ表面にキズなどがなく、次工程の伸線において
も断線が生じないワイヤ供給装置を提供することを目的
とする。DISCLOSURE OF THE INVENTION The present invention provides a device for stably supplying a thin wire to the next step, for example, in the step of annealing a flux-cored wire for stainless steel, there is no breakage or constriction, and there are no scratches on the wire surface. It is an object of the present invention to provide a wire supply device that does not cause disconnection even in the wire drawing in the next step.
【０００７】[0007]
【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、キャリアに積載したループ状ワイヤを加熱炉を通
して巻取り装置へ供給を行うワイヤ供給装置において、
キャリアと加熱炉間に立設した支柱の上部に設けた固定
ローラおよびその下部にワイヤ張力緩衝用ダンサローラ
を備えたワイヤの張力緩衝装置を設け、さらに該ダンサ
ローラの変位量を検出する手段、および前記キャリアに
はダンサローラの変位量に同期して停止または回転速度
を制御する電動機を備えることを特徴とするワイヤ供給
装置にある。The gist of the present invention is to provide a wire supply device for supplying a loop-shaped wire loaded on a carrier to a winding device through a heating furnace.
A fixed roller provided on an upper part of a column erected between the carrier and the heating furnace and a wire tension buffering device provided with a wire tension buffering dancer roller below the column, and means for detecting a displacement amount of the dancer roller, and In the wire supply device, the carrier is provided with an electric motor that stops or controls the rotation speed in synchronization with the displacement amount of the dancer roller.
【０００８】[0008]
【作用】図を用いて本発明の動作、機能を詳細に説明す
る。図１において巻取り装置２のキャプスタン６によっ
てワイヤ４の巻取りが開始されると、巻取り装置２と固
定ローラ９ｂ間の張力で張力緩衝装置８のダンサローラ
９ａがキャリア３ａとの間の張力に応じて上下動する。
また、ワイヤ４がキャリア３ａに絞り込まれ張力緩衝装
置８とキャリア３ａ間に張力がかかればダンサローラ９
ａが上昇して、ダンサローラ９ａの軸に取付けられてい
る検知部材１０が下近接スイッチ１１を検知してワイヤ
供給装置１のキャリア３ａを駆動している電動機１３が
回転速度を上げてワイヤ供給量を増加する。ワイヤ供給
量が多くなるとダンサローラ９ａが下降し、検知部材１
０が下近接スイッチ１１から外れて電動機１３が減速ま
たは停止してキャリア３ａからのワイヤ供給も少なくな
るか停止される。以上の動作を繰り返しながらワイヤ４
は連続的に供給されて焼鈍炉５で軟化された後にキャリ
ア３ｂへ巻き取られる。The operation and function of the present invention will be described in detail with reference to the drawings. In FIG. 1, when the winding of the wire 4 is started by the capstan 6 of the winding device 2, the tension between the winding device 2 and the fixed roller 9 b causes the tension between the dancer roller 9 a of the tension buffer 8 and the carrier 3 a. Move up and down according to.
If the wire 4 is narrowed down to the carrier 3a and tension is applied between the tension buffer 8 and the carrier 3a, the dancer roller 9
a rises, the detection member 10 attached to the shaft of the dancer roller 9a detects the lower proximity switch 11, and the electric motor 13 driving the carrier 3a of the wire supply device 1 increases the rotation speed to increase the wire supply amount. To increase. When the wire supply amount increases, the dancer roller 9a descends, and the detection member 1
When 0 is disengaged from the lower proximity switch 11, the electric motor 13 is decelerated or stopped, and the wire supply from the carrier 3a is reduced or stopped. Wire 4 while repeating the above operation
Is continuously supplied, softened in the annealing furnace 5, and then wound around the carrier 3b.
【０００９】従って、キャプスタン６と固定ローラ９ｂ
との間のワイヤ４にかかる張力が常に一定となり、焼鈍
炉５内でワイヤ４が断線したりくびれたりすることがな
く次工程の伸線においても断線することがない。Therefore, the capstan 6 and the fixed roller 9b
The tension applied to the wire 4 between and is always constant, the wire 4 does not break or constrict in the annealing furnace 5, and does not break even in the wire drawing in the next step.
【００１０】また、キャリア３ａに積載されたループ状
ワイヤ４が何らかの原因でからみやもつれが生じてワイ
ヤ４が張力緩衝装置８へ供給されなくなると、キャリア
３ａと固定ローラ９ｂ間の張力が増大してダンサローラ
９ａはさらに上昇し、検知部材１０が上近接スイッチ１
２を検知してキャプスタン６の駆動およびキャリア３ａ
の電動機１３を停止する。よって、焼鈍炉５内でワイヤ
４が断線することがなく、またワイヤ４表面にキズが生
じることがないので次工程の伸線においても断線するこ
とがない。When the loop-shaped wire 4 loaded on the carrier 3a is entangled or entangled for some reason and the wire 4 is no longer supplied to the tension buffer 8, the tension between the carrier 3a and the fixed roller 9b increases. The dancer roller 9a further rises, and the detection member 10 moves to the upper proximity switch 1
2 is detected to drive the capstan 6 and the carrier 3a
The electric motor 13 is stopped. Therefore, the wire 4 is not broken in the annealing furnace 5, and the surface of the wire 4 is not damaged, so that the wire is not broken even in the wire drawing in the next step.
【００１１】[0011]
【実施例】図１に本発明装置の１例を示す。張力緩衝装
置８には支柱２１が立設され、この支柱２１の上工程
（図において右側）にはキャリア３ａから送られるワイ
ヤ４の案内ローラ１４，１５が設けられ、さらにこの支
柱２１の上部にある案内ローラ１５とほぼおなじ高さ
に、かつ支柱２１の下工程側に固定ローラ９ｂを取付
け、固定ローラ９ｂの垂下位置に、ダンサローラ９ａが
支柱２１の上部、下部に設けた枝杆２３，２４に一体に
取り付けたガイド溝を有する垂直ガイド棒２２に装備さ
れている。FIG. 1 shows an example of the device of the present invention. A column 21 is erected on the tension buffer 8 and guide rollers 14 and 15 for the wire 4 sent from the carrier 3a are provided on the upper step (right side in the figure) of the column 21. The fixed roller 9b is attached to the lower process side of the support column 21 at almost the same height as a certain guide roller 15, and the dancer roller 9a is provided at the hanging position of the fixed roller 9b. It is equipped with a vertical guide rod 22 having a guide groove integrally attached to the.
【００１２】また、ダンサローラ９ａの主軸から延長さ
れた部材には支柱２１に設けられた上下の近接スイッチ
１１，１２に対応する位置に検出部材１０が取り付けら
ている。A detecting member 10 is attached to a member extending from the main shaft of the dancer roller 9a at a position corresponding to the upper and lower proximity switches 11 and 12 provided on the column 21.
【００１３】さらに、張力緩衝装置８はワイヤ供給装置
１、下工程の焼鈍炉５、巻取り装置２とワイヤ４によっ
て連動するようになっている。ワイヤ４はキャリア３ａ
から巻き戻され案内ローラ１４，１５を介して固定ロー
ラ９ｂに送り、固定ローラ９ｂを巻いてイ方向に進み、
ダンサローラ９ａをターンしてロ方向に進み、固定ロー
ラ９ｂを介して次工程の焼鈍炉５を通して巻取り装置２
のキャプスタン６に引き出されキャリア３ｂへ巻き取ら
れる。Further, the tension buffer 8 is linked with the wire feeder 1, the annealing furnace 5 in the lower step, the winding device 2 and the wire 4. Wire 4 is carrier 3a
Is fed back to the fixed roller 9b through the guide rollers 14 and 15 and wound around the fixed roller 9b to proceed in the direction a.
The dancer roller 9a is turned to proceed in the direction of B, and the winding device 2 is passed through the annealing roller 5 of the next step through the fixed roller 9b.
Is pulled out to the capstan 6 and is wound around the carrier 3b.
【００１４】ワイヤ４がキャリア３ａに絞り込まれ、張
力緩衝装置８とキャリア３ａの間に張力がかかればダン
サローラ９ａが上昇して、検知部材１０が下近接スイッ
チ１１を検知してワイヤ供給装置１のキャリア３ａを回
転駆動してワイヤ４を供給する。ワイヤ供給量が多くな
るとダンサローラ９ａが下降し、検知部材１０が下近接
スイッチ１１から外れ、ワイヤ供給量が少なくなるか停
止される。従って、キャプスタン６と固定ローラ９ｂと
の間のワイヤ４にかかる張力が常に一定となり、焼鈍炉
５内でワイヤ４が断線したりくびれたりすることがなく
次工程の伸線においても断線することがない。If the wire 4 is squeezed into the carrier 3a and a tension is applied between the tension buffer 8 and the carrier 3a, the dancer roller 9a rises and the detecting member 10 detects the lower proximity switch 11 to detect the wire feeding device 1. The carrier 3a is rotationally driven to supply the wire 4. When the wire supply amount is increased, the dancer roller 9a is lowered, the detection member 10 is disengaged from the lower proximity switch 11, and the wire supply amount is reduced or stopped. Therefore, the tension applied to the wire 4 between the capstan 6 and the fixed roller 9b is always constant, and the wire 4 is not broken or constricted in the annealing furnace 5 and is broken even in the wire drawing in the next step. There is no.
【００１５】また、キャリア３ａに積載されたループ状
ワイヤ４にからみやもつれが生じて張力緩衝装置８へワ
イヤ４が供給されなくなると、キャリア３ａと固定ロー
ラ９ｂ間の張力が増大してダンサローラ９ａはさらに上
昇し、検知部材１０が上近接スイッチ１２を検知してキ
ャプスタン６およびキャリア３ａの回転を停止する。よ
って、焼鈍炉５内でワイヤ４が断線することがなく、ま
たワイヤ表面にキズが生じることがないので次工程の伸
線においても断線することがない。When the loop-shaped wire 4 loaded on the carrier 3a becomes entangled or entangled and the wire 4 is no longer supplied to the tension buffer 8, the tension between the carrier 3a and the fixed roller 9b increases and the dancer roller 9a. Is further raised, and the detection member 10 detects the upper proximity switch 12 to stop the rotation of the capstan 6 and the carrier 3a. Therefore, the wire 4 is not broken in the annealing furnace 5, and the wire surface is not scratched, so that the wire is not broken even in the wire drawing in the next step.
【００１６】以上のワイヤ供給装置を用いて、ＪＩＳ
Ｚ３３２３ ＹＦ３０９ＬＣ相当のステンレス鋼用フラ
ックス入りワイヤを試作した。試作ワイヤは１４mm径の
２２Ｃｒ−１２Ｎｉ系ステンレスパイプに特公昭４５−
３０９３７号公報にある方法でフラックスを２３％振動
充填した。フラックスを充填したワイヤを、伸線−焼鈍
を繰り返して０．９mmと１．６mm径のステンレス鋼用フ
ラックス入りワイヤを各５００kg試作した。なお、比較
のために図２の従来の方法でも同様に試作した。なお、
ワイヤ供給速度は１５m/min 、焼鈍炉の温度は９８０℃
とした。それぞれ試作過程での断線回数を調べた。それ
らの結果を表１に示す。Using the above wire feeder, JIS
A flux-cored wire for stainless steel equivalent to Z3323 YF309LC was manufactured as a prototype. The trial wire is a 22mm-12Cr stainless steel pipe with a diameter of 14mm.
The flux was vibrationally filled by 23% by the method described in Japanese Patent No. 30937. The wire filled with the flux was subjected to wire drawing-annealing repeatedly to manufacture 500 kg of flux-cored wires for 0.9 mm and 1.6 mm in diameter for stainless steel. For comparison, a prototype was similarly produced by the conventional method shown in FIG. In addition,
Wire feed rate is 15m / min, annealing furnace temperature is 980 ℃
And The number of wire breakages in each trial process was examined. The results are shown in Table 1.
【００１７】[0017]
【表１】 [Table 1]
【００１８】表１からも明らかなように、本発明のワイ
ヤ供給装置により試作したワイヤは、焼鈍時にキャリア
で０．９mm径のワイヤがからみ・もつれが１回生じたに
もかかわらず、焼鈍時および伸線時の断線は皆無であ
り、極めて能率的に試作することができた。これに対し
て、比較例では送給側のキャリアでのからみ・もつれ回
数が多く、かつ焼鈍時の０．９mm径で４回，１．６mm径
で２回断線し、伸線工程においても、焼鈍時のワイヤの
くびれやキャリアでのからみ・もつれによって生じたワ
イヤ表面キズを原因とする断線が０．９mm径で３回、
１．６mm径で２回生じた。As is clear from Table 1, the wire trial-produced by the wire supply device of the present invention was annealed even though the wire having a diameter of 0.9 mm was entangled and entangled once in the carrier during annealing. Moreover, there was no disconnection at the time of wire drawing, and the prototype could be manufactured extremely efficiently. On the other hand, in the comparative example, the carrier on the feeding side has a large number of entanglements / entanglements, and the wire was broken 4 times at a diameter of 0.9 mm and 2 times at a diameter of 1.6 mm during annealing, and even during the wire drawing process, Breakage due to wire surface scratches caused by wire constriction and carrier entanglement during annealing was 0.9 mm diameter three times,
It occurred twice with a diameter of 1.6 mm.
【００１９】[0019]
【発明の効果】以上詳述したように本発明のワイヤ供給
装置によれば、細径ワイヤを次工程に安定して供給する
ことができ、例えばステンレス鋼用フラックス入りワイ
ヤの焼鈍工程で断線やくびれ、さらにワイヤ表面にキズ
等がなく、次工程の伸線においても断線を生じることが
ない。このため常時監視の必要がなくなり作業者の負担
が軽減されると共に、設備稼働率の低下を防止できるな
どの効果を奏する。As described in detail above, according to the wire feeding apparatus of the present invention, it is possible to stably feed the thin wire to the next step, and for example, disconnection or breakage occurs in the step of annealing the flux-cored wire for stainless steel. There is no constriction and there are no scratches on the wire surface, and no wire breakage occurs during wire drawing in the next step. Therefore, it is not necessary to constantly monitor the work load, which reduces the burden on the operator and prevents the facility operation rate from decreasing.
【図１】本発明のワイヤ供給装置の実施例を示す側面図
である。FIG. 1 is a side view showing an embodiment of a wire supply device of the present invention.
【図２】従来のワイヤ供給装置の実施例を示す側面図で
ある。FIG. 2 is a side view showing an embodiment of a conventional wire supply device.
１ ワイヤ供給装置 ２ 巻取り装置 ３ａ，３ｂ キャリア ４ ワイヤ ５ 焼鈍炉 ６ キャプスタン ８ 張力緩衝装置 ９ａ ダンサローラ ９ｂ 固定ローラ １０ 検知部材 １１ 下近接スイッチ １２ 上近接スイッチ １３ 電動機 １４，１５ 案内ローラ ２１ 支柱 ２２ 垂直ガイド棒 ２３，２４ 枝杆 1 Wire Supply Device 2 Winding Device 3a, 3b Carrier 4 Wire 5 Annealing Furnace 6 Capstan 8 Tension Damper 9a Dancer Roller 9b Fixed Roller 10 Detecting Member 11 Lower Proximity Switch 12 Upper Proximity Switch 13 Electric Motor 14, 15 Guide Roller 21 Strut 22 Vertical guide rod 23, 24 Branch rod
Claims (1)
熱炉を通して巻取り装置へ供給を行うワイヤ供給装置に
おいて、キャリアと加熱炉間に立設した支柱の上部に設
けた固定ローラおよびその下部にワイヤ張力緩衝用ダン
サローラを備えたワイヤの張力緩衝装置を設け、さらに
該ダンサローラの変位量を検出する手段、および前記キ
ャリアにはダンサローラの変位量に同期して停止または
回転速度を制御する電動機を備えることを特徴とするワ
イヤ供給装置。1. A wire feeding device for feeding a loop-shaped wire loaded on a carrier to a winding device through a heating furnace, and a fixed roller provided on an upper part of a pillar erected between the carrier and the heating furnace and a wire below the fixed roller. A wire tension buffer device having a tension buffer dancer roller is provided, and means for detecting the displacement amount of the dancer roller, and the carrier are provided with an electric motor for controlling the stop or rotation speed in synchronization with the displacement amount of the dancer roller. A wire feeder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21642394A JPH0871643A (en) | 1994-09-09 | 1994-09-09 | Wire feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21642394A JPH0871643A (en) | 1994-09-09 | 1994-09-09 | Wire feeding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0871643A true JPH0871643A (en) | 1996-03-19 |
Family
ID=16688338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21642394A Pending JPH0871643A (en) | 1994-09-09 | 1994-09-09 | Wire feeding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0871643A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161140A (en) * | 2011-04-02 | 2011-08-24 | 天津市金桥焊材集团有限公司 | Novel wire feeding equipment for production of electric welding rods and operating method thereof |
| KR20160099167A (en) * | 2015-02-11 | 2016-08-22 | 주식회사 유벨라 | Wire supplying apparatus of manufacturing apparatus for fish hook |
| CN110744223A (en) * | 2019-10-21 | 2020-02-04 | 江苏兴海特钢有限公司 | Preparation method of high-temperature alloy welding wire |
-
1994
- 1994-09-09 JP JP21642394A patent/JPH0871643A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161140A (en) * | 2011-04-02 | 2011-08-24 | 天津市金桥焊材集团有限公司 | Novel wire feeding equipment for production of electric welding rods and operating method thereof |
| KR20160099167A (en) * | 2015-02-11 | 2016-08-22 | 주식회사 유벨라 | Wire supplying apparatus of manufacturing apparatus for fish hook |
| CN110744223A (en) * | 2019-10-21 | 2020-02-04 | 江苏兴海特钢有限公司 | Preparation method of high-temperature alloy welding wire |
| CN110744223B (en) * | 2019-10-21 | 2021-05-25 | 江苏兴海特钢有限公司 | Preparation method of high-temperature alloy welding wire |
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