JPS58221234A - Heat treatment of steel wire rod - Google Patents

Abstract

PURPOSE:To improve the strength and drawability of a steel wire rod by precooling the hot rolled steel wire rod with boiling water then cooling the same in a cooling water tank having a temp. gradient and cooling the same again with the boiling water in the final thereby completing the transformation. CONSTITUTION:A hot-rolled steel wire rod 1 of high temp. is passed through the inside of a cooling tank 2 contg. 100 deg.C (T2) boiling water and is thereby precooled to the temp. just above the A1 transformation point. The rod is then put into a temp. gradient tank 3, where the rod is passed through the cooling liquid having 80 deg.C (T1), 90 deg.C (T3), 100 deg.C (T2) temp. gradient in the advance direction of the rod and is thus cooled down to 625 deg.C. The rod is thereafter cooled in a tank 4 contg. 100 deg.C (T2) boiling water to complete the transformation. The cooled rod is removed from the tank 4 at about 100 deg.C to complete the heat treatment. The 100 deg.C hot water on the outlet side in the tank 3 is ladled into a tank 6, and is mixed with makeup water 9 in a mixing tank 8 so as to be cooled to 80 deg.C. This warm water is supplied to the inlet side of the tank 3 to form a 90 deg.C temp. region in the intermediate part by the heating with the high temp. rod.

Description

【発明の詳細な説明】 に強度と伸線加工性を付与する熱処理方法に関し、特に
高温の線材を温水又は温水溶液中に浸漬して、所望の冷
却速度を与え、所定の熱処理を施す方法の改良に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION This invention relates to a heat treatment method for imparting strength and wire drawability to wire rods, particularly a method in which a high-temperature wire rod is immersed in hot water or a hot aqueous solution to give a desired cooling rate and then perform a predetermined heat treatment. It is about improvement.

高温の鋼線材を温水中で冷却し、熱処理することは公知
（例えば特公昭４５−８５８６号）であり、又温水中に
連続的に浸漬せしめて熱処理することも公知（？ｌｌえ
ば特公昭４６−８０８９号）である。これらの従来の方
法では温水の温度として適当な温度を選ぶことが可能で
あるが、水の場合は、油と異なり、熱伝達率が湯温によ
って大きく変化するので、湯温を相当厳密に管理する必
要があること、並びに例えば熱間圧延された線材を処理
する場合には、線材が温水中に持ち込む熱量はきわめて
大きく、このため湯温を所望の温度に保持する大規模な
設備を必要とするという大きな問題もあるので、湯温を
沸騰点とし、蒸発熱を利用して冷却することが行なわれ
ているのが普通である。It is known to heat-treat a high-temperature steel wire by cooling it in hot water (for example, Japanese Patent Publication No. 8586/1986), and it is also known to heat-treat by continuously immersing it in hot water (for example, Japanese Patent Publication No. 45-8586). -8089). With these conventional methods, it is possible to select an appropriate temperature for the hot water, but unlike oil, the heat transfer coefficient of water varies greatly depending on the water temperature, so the water temperature must be controlled quite strictly. For example, when hot-rolled wire rods are processed, the amount of heat that the wires bring into the hot water is extremely large, which requires large-scale equipment to maintain the hot water temperature at the desired temperature. Because of this, it is common practice to set the water temperature to the boiling point and use the heat of evaporation to cool the water.

このように沸騰水を用いる時には、冷却条件が安定する
という利点があるが、逆にその壕までは、冷却条件を変
化させることが困難であって、場合によっては冷却速度
が遅過ぎることがあり、例えば大径の線材になると、所
望の熱処理が行なえないという問題がある。この点を解
決するものとして、例えば線材の表面に核沸騰の核とな
り得るような被覆を施してから、温水中に浸漬する方法
（特開昭４８−３４７２７号）−や、或いは冷却の初期
の冷却速度を早くするために、冷水などを吹付けて予備
冷却する方法、又は沸騰点より低い湯桶中に先ず浸漬し
て急速冷却し、次いで沸騰水中で冷却する方法（％公昭
５５−１６２１７号）などが既に提案されている。Using boiling water in this way has the advantage of stable cooling conditions, but on the other hand, it is difficult to change the cooling conditions until the depth is reached, and in some cases the cooling rate may be too slow. For example, when it comes to large-diameter wire rods, there is a problem that desired heat treatment cannot be performed. To solve this problem, for example, there is a method in which the surface of the wire is coated with a material that can become the nucleus of nucleate boiling, and then immersed in hot water (Japanese Patent Application Laid-Open No. 48-34727), or a method in which the wire material is coated in a manner that can become a nucleus of nucleate boiling (Japanese Patent Application Laid-open No. 48-34727), or In order to speed up the cooling rate, there is a method of pre-cooling by spraying cold water, etc., or a method of first immersing it in a bath of water below the boiling point for rapid cooling, and then cooling it in boiling water (% Kosho No. 55-16217). etc. have already been proposed.

これらの公知の方法のうち、特開昭４８−３４７２７号
の方法では、被覆状態が安定しないために、冷却条件の
均一性に乏しく、特公昭５５−１６２１７号の方法では
、冷却速度を５０℃／秒以」二に大きくするために、７
０°Ｃ以下の温水を使用するので、冷却条件が安定せず
、時として表面に部分的過冷却を生じるなど、予備冷却
の終了時点の管理に困難を伴なう。さらに熱間圧延の線
材の場合には仕」＝温度のばらつきや、スケールの付着
状況のばらつきなどによって、予備冷却の終点管理はき
わめて困難になる問題を有している。さらに前述の如く
湯温全一定に保持するだめの特別の設備も大きな問題点
となる。Among these known methods, the method of JP-A-48-34727 has poor uniformity of cooling conditions because the coating state is not stable, and the method of JP-A-55-16217 has a cooling rate of 50°C. /second or more” to increase the number to 7
Since hot water of 0° C. or lower is used, the cooling conditions are not stable and sometimes partial supercooling occurs on the surface, making it difficult to manage the end of pre-cooling. Furthermore, in the case of hot-rolled wire rods, there is a problem in that it is extremely difficult to control the end point of pre-cooling due to variations in finish temperature and variations in scale adhesion. Furthermore, as mentioned above, special equipment for maintaining the hot water temperature at a constant level also poses a major problem.

本発明は、上述の問題点を解決するため、種々検討の結
果底されたもので、特別な温度勾配を持つ水槽を使用す
ることにより、線材表面の適冷組織の生成を防止し得て
、しかも冷却条件の管理がし易い鋼線材の熱処理方法を
提供するものである。The present invention was developed as a result of various studies in order to solve the above-mentioned problems, and by using a water tank with a special temperature gradient, it is possible to prevent the formation of a suitable cooling structure on the surface of the wire. Furthermore, the present invention provides a method for heat treating steel wire rods in which cooling conditions can be easily controlled.

高炭素鋼線側のパテンチング処理を例にとると、一般に
線材のオーステナイト化温度は９００°〜１００σＣで
あり、今例えば９５０℃とし、これ′ｆｆ：５０℃の温
水で予備冷却して、変態点付近の温度、例えば６５０°
Ｃまで冷却し、次いで沸騰水中で冷却処理するというパ
テンチング処理を考える。Taking the patenting treatment of high carbon steel wire as an example, the austenitizing temperature of the wire rod is generally 900° to 100σC, for example, let's set it to 950°C, pre-cool it with hot water of 50°C, and bring it to the transformation point. nearby temperature, e.g. 650°
Consider a patenting process in which the sample is cooled to C and then cooled in boiling water.

この場合、予備冷却処理が安定し難い理由は、湯温か低
いので、膜沸騰による冷却でも線材の中芯部の冷却速度
が５０°Ｃ／秒以上となり、表面ではさらに速やかな冷
却となるので、僅かな浸漬時間の差が表面温度に大きく
現われ易く、シかも膜沸騰の安定度が低いので、局部的
に核沸騰を起して冷却速度が著しく大きくなる危険があ
るためである。In this case, the reason why the pre-cooling process is difficult to stabilize is that the temperature of the water is low, so even when cooling by film boiling, the cooling rate of the central part of the wire is 50 ° C / sec or more, and the surface cooling is even faster. This is because a slight difference in immersion time tends to be greatly reflected in the surface temperature, and the stability of film boiling is low, so there is a risk that nucleate boiling will occur locally and the cooling rate will increase significantly.

結果として、特に表面に局部的な温度むらを生じ、５− 場所によっては過冷却部にマルテンサイトやペイナイト
ヲ生ずる危険があるものである。従って浸漬時間の管理
や、湯温の管理を行なっても、得られる終点温度のばら
つきが大きく問題となってくる。As a result, local temperature unevenness occurs, especially on the surface, and there is a risk that martensite or paynite may form in supercooled areas depending on the location. Therefore, even if the immersion time and the water temperature are controlled, variations in the end point temperature obtained become a major problem.

本発明者等は、この予備冷却速度を不必要に速くせず、
しかも冷却上重要な変態点付近の温度範囲のみの冷却速
度を太きくすることを種々検討し、これにより管理し易
く、又大径の線材においても抗張力の高い直接熱処理縁
材とし得ることを見出だし、本発明を成すに至ったもの
である。The present inventors did not make this preliminary cooling rate unnecessarily high;
Furthermore, we conducted various studies on increasing the cooling rate only in the temperature range near the transformation point, which is important for cooling, and found that this would make it easier to control, and that even large-diameter wire rods could be made into directly heat-treated edge materials with high tensile strength. This is the beginning that led to the present invention.

即ち本発明は、高温にある鋼線材を温水中又は添加剤を
含む水溶液中に連続的に浸漬して熱処理する方法におい
て、前記線材のＡ、変態点ｉｉ上上付外らの冷却処理を
、前記線材の進行方向の少なくとも甲ｊｂ］に温度勾配
を有し、かつ入口側の温度を沸騰点以下の低温とし、出
口側の温度を前記入口側より高温にした前記温水又は温
水溶液の槽中に前記線材を通過せしめて行なうことを特
徴とする鋼線材の熱処理方法である。That is, the present invention provides a method of heat-treating a steel wire rod at a high temperature by continuously immersing it in hot water or an aqueous solution containing additives, in which the cooling treatment of the wire rod A, transformation point ii, upper and outer parts, The bath of hot water or hot aqueous solution has a temperature gradient at least in the traveling direction of the wire, and the temperature on the inlet side is lower than the boiling point, and the temperature on the outlet side is higher than the inlet side. This is a heat treatment method for a steel wire, characterized in that the heat treatment is carried out by passing the wire through the steel wire.

６一 本発明において、鋼線材とは、ＣＯ，０１〜１．０９６
ｆ：含む炭素鋼、これに不可避的な不純物、強度を向上
するための他の元素等を含む鋼などより成る鋼線材であ
る。61 In the present invention, steel wire refers to CO,01 to 1.096
f: A steel wire rod made of carbon steel containing carbon steel, unavoidable impurities, steel containing other elements for improving strength, etc.

又高温にある鋼線材とは、熱間圧延された高温の線材、
又は両加熱された高温の線材（含伸腺途中の線材）を意
味する。Also, the steel wire rod at high temperature refers to hot rolled high temperature wire rod,
Or, it means a high-temperature wire rod that is heated on both sides (a wire rod that is in the middle of being expanded).

以下、本発明を図面を用いて実施例により説明する。Hereinafter, the present invention will be explained by examples using the drawings.

第１図は本発明方法の実施例に用いられる連続熱処理装
ｊ山の例を示す縦断面図および湯温分布図である。図に
おいて、高温にある鋼線材ｌは、予備冷却槽部２、温度
勾配種部３、後冷却槽部４を連続的に通過して巻取られ
る。各僧都２．３．４内には温水又は添加剤を含む温水
溶液が収容されている。添加剤としては、例えばＰＶＡ
（ポリビニールアルコール〕等の界面活性剤、防錆又は
潤滑皮膜等の効果を有する物質などが用いられる。FIG. 1 is a longitudinal sectional view and a hot water temperature distribution diagram showing an example of a continuous heat treatment apparatus used in an embodiment of the method of the present invention. In the figure, the steel wire l at high temperature passes continuously through a pre-cooling tank section 2, a temperature gradient seeding section 3, and a post-cooling tank section 4 and is wound up. Contained within each sojourn 2.3.4 is hot water or a hot water solution containing additives. As an additive, for example, PVA
Surfactants such as polyvinyl alcohol (polyvinyl alcohol), substances having antirust or lubricating film effects, and the like are used.

予備冷却槽部２および後冷却槽部４の湯温は下図に示す
ように、沸騰点付近に保持され、温度勾配種部３の湯温
は、入口側の温度が沸騰点以下の低温（例、８０°Ｃ〕
に、出口側の温度が入口側より高い温度（例、沸騰点１
００°Ｃ）にされ、この僧都で全部又は一部の区間は入
口側より出口側に向って沸騰点以下の低温から沸騰点に
近づく高温−マでの温度勾配が進行方向に設けられてい
る。この出口側の温度は入口側の温度より高いことが必
要で、沸騰点より相当低くても良い。１６．１７はそれ
ぞれ僧都２，３を出た線材ｌの温度を測定するだめの線
用測温計である。As shown in the figure below, the water temperature in the preliminary cooling tank section 2 and the post-cooling tank section 4 is maintained near the boiling point, and the water temperature in the temperature gradient seeding section 3 is maintained at a low temperature (e.g., below the boiling point) at the inlet side. , 80°C]
When the temperature on the outlet side is higher than the inlet side (e.g. boiling point 1
00°C), and in all or part of the section of this monk's capital, there is a temperature gradient in the direction of travel, from low temperatures below the boiling point to high temperatures approaching the boiling point, from the entrance side to the exit side. . The temperature on the outlet side needs to be higher than the temperature on the inlet side, and may be considerably lower than the boiling point. 16 and 17 are wire thermometers that measure the temperature of the wire l leaving Sozu 2 and 3, respectively.

高温（例、９５０°Ｃ）にある鋼線材１は先ず僧都２中
の沸騰水により予備冷却され、線温ｋＡ＋変態点直上付
近（例、７５０°Ｃ〕に持ち来たされる。この場合の線
材の冷却は膜沸騰によるので、冷却速度は比較的遅く、
非常に安定しており、線材の温度管理も容易である。The steel wire 1 at a high temperature (e.g. 950°C) is first pre-cooled by boiling water in the Sozu 2 and brought to a temperature near the wire temperature kA + just above the transformation point (e.g. 750°C). Since the wire is cooled by film boiling, the cooling rate is relatively slow.
It is very stable and the temperature of the wire can be easily controlled.

なお、本発明方法ではこの予備冷却は必ずしも必要でな
く、最初の線温（例、８００℃以下）によっては、これ
を省略し、最初から温度勾配種部３に浸漬しても良い。Note that this preliminary cooling is not necessarily necessary in the method of the present invention, and depending on the initial linear temperature (for example, 800° C. or lower), it may be omitted and immersed in the temperature gradient type section 3 from the beginning.

次に、Ａ、変態点直上付近の線材Ｉは温度勾配種部３に
導びかれて冷却処理される。この冷却処理は、入口側部
分の低温部では冷却速度が最も大きく、その後の冷却速
度は次第に減少し、出口側部分では沸騰水中の冷却速度
に近付けるようにして適冷現象の発生を防止すると共に
、太径の線材にも所望の熱処理が行なえるようにしたも
のである。Next, A, the wire I near the transformation point is guided to the temperature gradient seeding section 3 and cooled. In this cooling process, the cooling rate is highest in the low-temperature part of the inlet side, after which the cooling rate gradually decreases, and in the outlet side part, the cooling rate is brought close to that of boiling water, thereby preventing the occurrence of an adequate cooling phenomenon. , it is possible to perform the desired heat treatment even on large-diameter wire rods.

この場合の冷却条件は線材の冷却速度、槽内の温度分布
、浸漬時間即ち浸漬長さを調節することによって調節さ
れ、さらに温度勾配の作成に当っては、後述するように
湯の蒸発分を補なう補給水を使用して形成させる。The cooling conditions in this case are adjusted by adjusting the cooling rate of the wire, the temperature distribution in the bath, and the immersion time, that is, the immersion length.Furthermore, in creating the temperature gradient, the evaporation of the hot water is adjusted as described later. Form using supplementary make-up water.

本発明方法による熱処理による機構について、さらに詳
しく説明する。The mechanism of heat treatment according to the method of the present invention will be explained in more detail.

例えば高温の高炭素鋼線材を連続冷却によってパテンチ
ングする場合（熱間圧延された高温の線材を沸騰水中に
浸漬冷却する場合もこれに該当する）に、実質的に抗張
力に影響を及ぼす冷却速度は所謂変態点以下での冷却速
度であり、しかも変態が完了した後は、冷却速度は無関
係になること＝９− に注目すると、予備冷却として上述のように通常の沸騰
水中浸漬を用いれば充分で、しかもスケール生成の抑止
も可能であること、又この場合の冷却速度であれば、変
態点付近の温度（例えば７５０°Ｃ〕になる昔でに例え
ば１０〜１５秒かかるので、この浸漬時間を調節するこ
とによる線温管理が容易であることが分る。沸騰水中冷
却による冷却速度では、線材の表面と中芯との温度差は
略２０℃（線径］Ｑｍｍ）と小さく、５０°Ｃの温水の
場合の略６０℃（又はそれ以上）に比べて、適冷の起る
確率は大幅に減少する。For example, when patenting a high-temperature high-carbon steel wire rod by continuous cooling (this also applies when hot-rolled high-temperature wire rod is cooled by immersion in boiling water), the cooling rate that actually affects the tensile strength is Note that this is the cooling rate below the so-called transformation point, and that once the transformation is complete, the cooling rate becomes irrelevant = 9- It is sufficient to use ordinary boiling water immersion as described above as preliminary cooling. Moreover, it is possible to suppress scale formation, and with the cooling rate in this case, it would have taken 10 to 15 seconds to reach the temperature near the transformation point (for example, 750°C), so the immersion time is It can be seen that the wire temperature can be easily controlled by adjusting the temperature.With the cooling rate by boiling water cooling, the temperature difference between the surface and the core of the wire is as small as approximately 20°C (wire diameter Qmm), and the temperature difference is as small as 50°C. Compared to approximately 60°C (or higher) in the case of hot water, the probability of moderate cooling is significantly reduced.

次いで線材は例えば８０°Ｃ前後の温水中に浸漬されて
冷却を受けるが、線材の移動速度と温水の流速との関係
が一定であれば、温水は処理される線材から移動する熱
量によって湯温か次第に上昇し、線材の進行方向に沿っ
て湯温か次第に高くなるという温度勾配全定常的に持つ
ようになる。線材が槽を出る時の線材の温度は、その時
の温水の流量、湯温によって定寸るが、このことはこれ
らの条件を適当に選べば、線材の温度を所望の値にする
こ一１〇− とが可能であることを示している。The wire is then immersed in hot water, for example around 80°C, to be cooled, but if the relationship between the moving speed of the wire and the flow rate of the hot water is constant, the temperature of the hot water will vary depending on the amount of heat transferred from the wire being processed. The temperature gradually rises, and the temperature gradient becomes constant throughout, with the temperature of the hot water gradually increasing along the direction of movement of the wire. The temperature of the wire when it leaves the tank is determined by the flow rate of hot water and the temperature of the hot water at that time, but this means that if these conditions are selected appropriately, the temperature of the wire can be set to the desired value. 〇- indicates that it is possible.

第１図に示す水補給装置５はこの原理を利用して温度勾
配種部３内に所望の温度勾配を形成するため設けられた
ものである。図において、水補給装＠５には、湯タンク
６と混合タンク８が設けられ、湯タンク６からの１００
°Ｃの湯７と補給用の水９が混合タンク８に注入され、
攪拌器１０により混合されて８０°Ｃの温水が作成され
、温水１１がバルブ】２により温度勾配種部３の入口側
に補給される。The water supply device 5 shown in FIG. 1 is provided to form a desired temperature gradient within the temperature gradient seeding section 3 by utilizing this principle. In the figure, the water supply device @5 is provided with a hot water tank 6 and a mixing tank 8, and 100
°C hot water 7 and makeup water 9 are injected into the mixing tank 8,
A stirrer 10 mixes the water to create 80°C hot water, and the hot water 11 is supplied to the inlet side of the temperature gradient seeding section 3 through a valve 2.

湯タンク６の１００°Ｃの湯は、温度勾配種部３からポ
ンプ１３により汲上げられる。又湯タンク６からはバル
ブ１４により後冷却槽部４に湯が補給され、′又剰余湯
はバルブ１５により排出される。１８〜２３は温水用測
温計である。Hot water at 100°C in the hot water tank 6 is pumped up from the temperature gradient seeding section 3 by the pump 13. Further, hot water is supplied from the hot water tank 6 to the post-cooling tank section 4 through a valve 14, and surplus hot water is discharged through a valve 15. 18 to 23 are thermometers for hot water.

このように構成された水補給装置５を適当に操作するこ
とにより、次の実施例で述べるように温度勾配種部３内
に所望の温度勾配を定常状態で作□ 成し得る。By appropriately operating the water replenishing device 5 constructed in this way, a desired temperature gradient can be created in the temperature gradient seeding section 3 in a steady state, as will be described in the next example.

なおＴ１．Ｔ０ｎ　Ｔａは各部の湯温の例を示すもので
、Ｔ、　＝８０°Ｃ，Ｔ２二１００°Ｃ，Ｔ８＝９０°
Ｃである。Note that T1. T0n Ta indicates an example of the water temperature at each part, T = 80°C, T2 = 100°C, T8 = 90°
It is C.

以下、実施例によりさらに詳しく述べる。Hereinafter, it will be described in more detail with reference to Examples.

実施例； 第１図に示す連続熱処理装置を用いて］Ｏｍｐ４の０．
８９６Ｃ鋼線材のバテンチング処理を行なった。Example; Using the continuous heat treatment apparatus shown in FIG. 1] Omp4 of 0.
Battening treatment was performed on 896C steel wire.

先ず９５０°Ｃの温度の線材ｌを僧都２中の１００°Ｃ
の沸騰水中に浸漬し、予備冷却した。この時の冷却速度
は略１８°Ｃ／秒であり、約１１秒で線温７５０°Ｃに
達した。線材の中芯と表面の温度差は略２０°Ｃで、表
面では約７４０°Ｃ１中芯では約７６０°Ｃとなった。First, the wire l at a temperature of 950°C was heated to 100°C in Sozu 2.
immersed in boiling water and pre-cooled. The cooling rate at this time was approximately 18°C/second, and the linear temperature reached 750°C in approximately 11 seconds. The temperature difference between the core and the surface of the wire was approximately 20°C, which was approximately 740°C at the surface and approximately 760°C at the core.

線材の温度は出口側の線用測温計１６で測定され、浸漬
時間即ち浸漬長さが調節されるようになっている。１０
０°Ｃの沸騰水中の膜沸騰冷却速度は非常に安定してお
り、浸漬時間によって出口温度を管理することが可能で
ある。The temperature of the wire is measured by a wire thermometer 16 on the exit side, and the immersion time, that is, the immersion length is adjusted. 10
The film boiling cooling rate in boiling water at 0°C is very stable, and the outlet temperature can be controlled by the immersion time.

次いで、線材１は種部３中の８０°Ｃから１００°Ｃま
で進行方向に変化する温度勾配を有する混水中に導かれ
、浸漬冷却された。８０℃以上の温度では、冷却速度は
沸騰水中冷却よりも大きくなるが、膜沸騰が充分に安定
であり、湯温と浸漬時間で冷却条件を管理することが出
来る。この段階で線温を例えば７５０℃から６２５°Ｃ
に低下させる。Next, the wire 1 was guided into mixed water having a temperature gradient varying from 80°C to 100°C in the advancing direction in the seed part 3, and cooled by immersion. At a temperature of 80° C. or higher, the cooling rate is higher than that of boiling water cooling, but film boiling is sufficiently stable and cooling conditions can be controlled by the water temperature and immersion time. At this stage, the line temperature should be increased from 750°C to 625°C.
decrease to.

最後に、線材１は種部４中の１００℃の沸騰水中に浸漬
冷却され、変態を完了させ、約１００℃になった線材を
僧都４から引き出し、パテンチング処理した線材を得た
。Finally, the wire rod 1 was immersed and cooled in boiling water at 100°C in the seed part 4 to complete the transformation, and the wire rod at about 100°C was pulled out from the Sozu 4 to obtain a patented wire rod.

かように処理された線材は、従来の沸騰水中のみで処理
した場合と比べて、ＡＩ変態点直上から実際に変態が完
了するまでの、所謂オーステナイトの擬安定域並びに変
態中での冷却速度を大きくすることができるので、得ら
れた線材の性能が良好になると共に、又太径の線材に対
しても好ましい冷却条件を形成することになる。The wire rod treated in this way has a lower cooling rate during the so-called pseudo-stable region of austenite and during the transformation, from just above the AI transformation point until the actual transformation is completed, compared to the conventional case treated only in boiling water. Since the wire rod can be made larger, the performance of the obtained wire rod is improved, and favorable cooling conditions can be created even for wire rods with a large diameter.

なお、温度勾配槽３中の沸騰点以下の温度（［ザブクー
ノー状態と呼ばれる）の温水は、線材１との接触で湯温
か上昇するので、所望の条件を得るため、次のように流
量、初期小温を変化させて調節し′ｆｃ。Note that the temperature of the hot water below the boiling point in the temperature gradient tank 3 (referred to as the Zabkunow state) increases when it comes into contact with the wire rod 1, so in order to obtain the desired conditions, the flow rate and initial value are adjusted as follows. Adjust by changing the small temperature.

前述のように、予備冷却で線材は９５０℃から７５０°
Ｃに冷却され、この間線材］　Ｋｇから失なわれる熱量
は３０繭　　となり、湯は０．０５６ｅ蒸発して失１３
− なわれる。As mentioned above, the wire is heated from 950°C to 750° with pre-cooling.
During this time, the amount of heat lost from the wire rod is 30 kg, and the hot water is evaporated to 0.056 e and 13 kg is lost.
- be called.

次にサブクール状態での冷却では、線材は７５０°Ｃか
ら６２５℃壕で冷却され、この間に失なわれる熱量は１
８．８−であるが、蒸発は無い。Next, in subcooled cooling, the wire is cooled from 750°C to 625°C in a trench, and the amount of heat lost during this time is 1
8.8-, but there is no evaporation.

そして最後に線材は沸騰水中の冷却で、６２５°Ｃから
１００℃に冷却され、９６圓が失なわれ、蒸発量は０．
１７８看である。従って全蒸発量は０．２８４．＆とな
り、線材Ｉ　Ｋｇ当り０．２３４ｆｉの温水の補給が必
要となる。Finally, the wire is cooled in boiling water from 625°C to 100°C, losing 96 circles and the amount of evaporation being 0.
It is 178 views. Therefore, the total evaporation amount is 0.284. &, it is necessary to replenish 0.234fi of hot water per I kg of wire.

サブクールの温水の作成のために、この補給水と１００
℃の湯とを混合するとすれば、８０°Ｃの温水とするに
は、補給水の温度を常温（２０°Ｃ）とすれば、この３
倍の湯と混合すれば良いことになる。To create sub-cooled hot water, use this supplementary water and 100
To make hot water of 80°C, if the temperature of the make-up water is room temperature (20°C), these 3
All you have to do is mix it with twice as much hot water.

即ち本発明方法では、温度勾配種部からの１００°Ｃの
湯０．７０２１−ｆｚ２０℃の水０．２８４１と混合タ
ンク８で混合して作った８０°Ｃの温水０．９３６４を
、温度勾配種部３の線材ＩＫｇ当りに接触せしめれば、
蒸発分を補充し得て、しかも図に示す温度分布を保持し
得、サブクール状態での冷却全挿入することができる。That is, in the method of the present invention, 80°C hot water 0.9364 produced by mixing 100°C hot water 0.7021-fz 20°C water 0.2841 from the temperature gradient seeding section in the mixing tank 8, If it is brought into contact with the wire rod Ikg of seed part 3,
It is possible to replenish the evaporated content, maintain the temperature distribution shown in the figure, and completely insert cooling in a subcooled state.

しかしこの場合には、湯温は線材の入口１４− 部分では８０°Ｃであるが、出口部分では１００°Ｃに
上昇する。However, in this case, the temperature of the hot water is 80°C at the inlet 14- portion of the wire, but rises to 100°C at the outlet.

この段階で失なわれる線材の熱量がＩＫｇ当り１８８−
であり、湯量が０．９３６βであるから２０℃上昇する
計算になる。（２０°Ｃの水０，２３４ｉＥ８０°Ｃ上
昇して１００℃になると考えても良い。）このように、
補給水を使用して線材の進行方向に定常的な温度勾配を
持たせ得ることも本発明の一つの特徴である。この場合
には、温水と線材との間の速度差は無関係であり、この
ことは冷却条件の管理に有利である。本実施例の如く、
温水が１００℃に上昇する場合には、供給する温水量に
よって、この区間の線材の温度低下量が一義的に定まる
ことになり、過冷却を防止する点も含め、冷却条件の管
理に好都合である。なお＋００°Ｃに上昇する時には、
ザブクールの僧都（３）と次の後冷却槽部４との間の仕
切りを除いても良い。The amount of heat lost in the wire at this stage is 188- per IKg.
Since the amount of hot water is 0.936β, it is calculated that the temperature will rise by 20°C. (You can think of water at 20°C as 0,234iE80°C rising to 100°C.) In this way,
Another feature of the present invention is that it is possible to create a steady temperature gradient in the direction of movement of the wire by using make-up water. In this case, the speed difference between the hot water and the wire is irrelevant, which is advantageous for controlling the cooling conditions. As in this example,
When the hot water rises to 100℃, the amount of temperature drop of the wire in this section is uniquely determined by the amount of hot water supplied, which is convenient for managing cooling conditions, including preventing overcooling. be. Furthermore, when the temperature rises to +00°C,
The partition between the Zabkur monastery (3) and the next post-cooling tank section 4 may be removed.

サブクールの僧都（３）で失なわれる熱量は前述のよう
に線材Ｉ　Ｋｇ当り１８．８−であるから、そのザブク
ールの温水が線材と接触して湯温か上昇するのを仮に１
°Ｃに抑えようとすれば線材］　Ｋｇ当り１８．８βを
必要とする。温度上昇２°Ｃなら９４ｅとなる（以下同
様）。本例の如＜２０°Ｃ上−ｆ’ｌヲ許すならば＋　
８．８／２０＝０．９３６１で良いことになる。そして
線材１Ｋｇ当りこの量の８０℃の湯を供給してやれば良
いのであり、流速は無関係である。但し、この場合には
例えば８０°Ｃから８１°Ｃまでの１°Ｃの上昇を許す
とすルト、８１°Ｃの温水１８．５ｎと２０’Ｃｔ７）
水０．３　ｅ’を略混合することになるが、２０°Ｃの
水の量が蒸発分を補充する量より若干多くなるので、余
分な量（Ｏ，ａ−０，２３４＝０．０１６ｆｆ）’を排
出させることが必要となる。温度上昇２０℃未満の他の
温度の場合も同様に計算できる。１°Ｃ程度の上昇なら
、温度勾配無しという表現も可能であるが、この粂件も
本発明の範囲である。As mentioned above, the amount of heat lost in the subcool Sozu (3) is 18.8 - per kg of wire rod, so if the hot water in the subcool comes into contact with the wire rod and the temperature rises, then 1
If you want to keep it at °C, you need 18.8β per kg of wire rod. If the temperature rises by 2°C, it becomes 94e (the same applies below). As in this example, if <20°C above-f'l is allowed, +
8.8/20=0.9361 is good. It is sufficient to supply this amount of hot water at 80° C. per 1 kg of wire, and the flow rate is irrelevant. However, in this case, for example, if a 1°C increase from 80°C to 81°C is allowed, the temperature of 81°C hot water 18.5n and 20'Ct7)
Approximately 0.3 e' of water will be mixed, but since the amount of water at 20°C is slightly larger than the amount to replenish the evaporated content, the extra amount (O, a - 0,234 = 0.016 ff )' must be discharged. Similar calculations can be made for other temperatures where the temperature rise is less than 20°C. If the increase is about 1°C, it can be said that there is no temperature gradient, but this case is also within the scope of the present invention.

又サブクールの温水中での線材温度の低下を、供給温水
量を増加することによって例えば７５０’Ｃから５５０
℃と任意に大きくすることが出来、この場合には変態中
の発熱を抑えるのに有効であることも容易に理解される
。又１００°Ｃの沸騰水中での予備冷却を行なわない方
法も実施可能である。In addition, the wire temperature in the subcooled hot water can be reduced from 750'C to 550'C by increasing the amount of hot water supplied.
℃, and it is easily understood that in this case, it is effective in suppressing heat generation during transformation. It is also possible to implement a method without pre-cooling in boiling water at 100°C.

上述のように、本発明方法において、前述のような水補
給装置５を使用すると、蒸発や線材に付着して持出され
ることなどによって失なわれる湯量に略見会う程度の常
温の水を用いて、沸騰点以下であって膜沸騰の安定な任
意の温度の温水を作成して、これを変態が完了するまで
の少なくとも一部の区間において線材の進行方向と同じ
方向に流して線材と接触せしめ、供給する温水の温度と
、１線月の単位重量当りの温水の供給量とを変化させる
ことにより、この区間に進行方向に所望の温水の温度勾
配を定常状態で作成し、これによってこの区間での冷却
速度を犬きくすることができる効果が得られる。As described above, in the method of the present invention, when the water replenishing device 5 as described above is used, the amount of water at room temperature that is approximately equal to the amount of hot water that is lost due to evaporation, adhesion to the wire and being carried out, etc. is used. Then, hot water at an arbitrary temperature below the boiling point and stable for film boiling is created, and it is brought into contact with the wire by flowing it in the same direction as the traveling direction of the wire in at least part of the section until the transformation is completed. By changing the temperature of hot water supplied and the amount of hot water supplied per unit weight per linear month, a desired temperature gradient of hot water is created in the traveling direction in this section in a steady state. This has the effect of increasing the cooling rate in the section.

本発明の実施例として、水補給装置５がらの供給温水の
温度ヲ８０°Ｃおよび６０’Ｃとし、それぞれ補給量を
表１に示すように変えた時の１ｏ励ｌｆの０．８％Ｃ鋼
線材の冷却曲線の例を示すと、第２図および第３図に示
す通りである。As an example of the present invention, the temperature of the hot water supplied from the water replenishment device 5 was set to 80°C and 60'C, and the replenishment amount was changed as shown in Table 1. Examples of cooling curves for steel wire rods are shown in FIGS. 2 and 3.

第２図は温度勾配僧都３内での出口側の温度を１７− ’ｚ　１００℃とした場合、第３図は温度上昇分を］　
’Ｃとした場合を示す。Figure 2 shows the temperature gradient.If the temperature on the exit side in Sozu 3 is 17-'z 100℃, Figure 3 shows the temperature rise.]
'C' is shown.

なお、比較例として＋００’Ｃの沸騰水中に連続的に浸
漬した場合を同時に示した。In addition, as a comparative example, a case where the samples were continuously immersed in +00'C boiling water was also shown.

図より、本発明による方法は、比較例に比べ、サブクー
ルの区間での冷却速度が大きくなり、そしてこの冷却速
＃は供給湯温か低い程、又槽内の湯温上昇が小さい程大
きくなることが分る。From the figure, the method according to the present invention has a higher cooling rate in the subcooling section than the comparative example, and this cooling rate # increases as the temperature of the supplied water decreases and as the rise in temperature of the hot water in the tank decreases. I understand.

又得られたパテンチング処理鋼線材の性能は表１に示す
通りである。Further, the performance of the obtained patented steel wire rod is as shown in Table 1.

に比べ強度が向上しでいることが分る。It can be seen that the strength is improved compared to

＝１８− 以上のように構成された本発明方法は次のような効果が
ある。=18- The method of the present invention configured as described above has the following effects.

（イ）　前述の鋼線材の熱処理方法において、前記線材
のＡｌ変態点直上付近からの冷却処理を、前記線材の進
行方向の少なくとも中間に温度勾配を有し、かつ入口側
の温度全沸騰点以下の低温とし、出口側の温度を前記入
口側より高温にした前記温水又は温水溶液の槽中に前記
線材を通過せしめて行なうため、鋼の変態全左右する変
態点以下の区間での冷却が、沸騰点以下の温水の部分で
初めは冷却速度が太きいが、次第に緩くなるという冷却
条件になること、およびこの区間の線材の温度の低下量
を、例えば補給する温水量を一定にすることによって常
に一定値に容易になし得るので、結果として過冷却が自
ずと防止されて、全長に亘り均一でベイナイト、マルテ
ンサイト等の欠陥が々く、強度の商い伸線加工性の良好
な鋼線材が得られ、又冷却条件の管理が容易であると共
に、大径の線材でも高い引張強さのバテンチング処理線
材が得られる利点がある。(b) In the above-mentioned method for heat treatment of steel wire, the cooling treatment from just above the Al transformation point of the wire is performed with a temperature gradient at least in the middle in the direction of movement of the wire, and a temperature on the inlet side that is below the total boiling point. Since the wire rod is passed through a bath of hot water or a hot aqueous solution with a temperature at the outlet side higher than that at the inlet side, the cooling in the section below the transformation point, which affects the entire transformation of the steel, is The cooling condition is such that the cooling rate is initially high in the hot water section below the boiling point, but gradually becomes slower, and the amount of decrease in the temperature of the wire in this section can be controlled by, for example, keeping the amount of hot water supplied constant. Since it can be easily maintained at a constant value at all times, supercooling is naturally prevented, and a steel wire rod that is uniform over the entire length, has many defects such as bainite and martensite, and has good wire drawability due to its strength. Furthermore, there are advantages in that cooling conditions can be easily managed and a batented wire rod with high tensile strength can be obtained even with a large diameter wire rod.

（ロ）　酸相の冷却の初期に、予備冷却として沸騰水を
使用し得るため、予備冷却の冷却速度が余り速くならな
いので、予備冷却条件の管理を容易になし得る。(b) Since boiling water can be used as pre-cooling at the initial stage of cooling the acid phase, the cooling rate of the pre-cooling does not become too fast, so the pre-cooling conditions can be easily managed.

（ハ）　温度勾配槽中の温度勾配を蒸発などによって失
なわれる分を補給する補給水を使用して作成することが
できるので、設備が簡単である。(c) The temperature gradient in the temperature gradient tank can be created using make-up water to replenish the amount lost due to evaporation, etc., so the equipment is simple.

なお、上述の説明では主として本発明方法を鋼線材に適
用する場合について述べたが、この方法は鋼の場合に限
らず、他の一般の金属線材の熱処理にも適用し得ること
は明らかである。In addition, although the above explanation mainly describes the case where the method of the present invention is applied to steel wire rods, it is clear that this method can be applied not only to the case of steel but also to heat treatment of other general metal wire rods. .

【図面の簡単な説明】[Brief explanation of the drawing]

第１囚は本発明方法の実施例に用いられる連続熱処理装
置の例を示す縦断面図および湯温分布図である。 第２図および第３図はそれぞれ本発明の実施例および比
較例の冷却曲線を示す図である。 ｌ・・・鋼線材、２・・・予備冷却槽部、３・・・温度
勾配種部、４・・後冷却槽部、５　水補給装器、６・・
・湯タンク、７・・湯、８・・混合タンク、９・・・補
給用の水、１０・攪拌器、１１・・温水、１２．１４．
１５　　バルブ、１３・・ポンプ、１６．１７・線用測
温計、１８〜２３・・温水用測温計、ＴＩ、　Ｔ２．　
Ｔ３・湯温。 −２１＝ 手続補正書 １　事件の表示 ２、発明考案の名称 鋼線材の熱処理方法 ３　補正をする者 事件との関係　　　特許出願人 住所　　　　大阪市東区北浜５丁目１５番地名称（２１
３）住友電気工業株式会社 ４、代理人　代７者社長用１哲部 住所　大阪市淀用区西中島１丁目９番２０号新中島ビル
７階（電話大阪８０４−８８０３）５　補正命令の日付 ■毛に）；害丑−→ト＝−匝 自発補正 ６、補正の対象 明細量中、発明の詳細な説明の欄。 ７、補正の内容 明細量、第１６頁、第１１行目、第１２行目、「必要と
なる。」の次に「なお、このように蒸発分を」−廻る補
給水を必要とする場合には、２０°Ｃの水の補給量を蒸
発分の量に止め、水補給装置５内の混合タンク８中に乾
燥空気を吹き込み、主として蒸発潜熱を奪う原理で温水
を補助的に冷却する方法を採っても」：い。この場合、
吹き込む空気量を適切（上述の例の場合的１３１りにす
れば、余分な水量を排出する必要が全くなくなる。」を
挿入する。 ２− 手続補正書 １、事件の表示 ２、発明考案の名称 鋼線材の熱処理方法 ３　補正をする者 事件との関係　　特許出願人 住　所　　　大阪市東区北浜５丁目１５番地名称（：１
１３）住友電気工業株式会社代表者　社長　川　上　哲
　部 ４代理人 住所　大阪市淀用区西中島１丁目９番２０号５　補正命
令の日刊 自発補正 ６　補正の対象 明細書に添付した図面。 ７　補正の内容 第１図〜第３図を別紙の如く訂正する。 芳２図 詩　句　（享ダ） 叫向（杼）The first picture is a longitudinal sectional view and a hot water temperature distribution diagram showing an example of a continuous heat treatment apparatus used in an embodiment of the method of the present invention. FIG. 2 and FIG. 3 are diagrams showing cooling curves of an example of the present invention and a comparative example, respectively. l... Steel wire rod, 2... Pre-cooling tank section, 3... Temperature gradient type section, 4... Post-cooling tank section, 5 Water supply device, 6...
・Hot water tank, 7. Hot water, 8. Mixing tank, 9. Water for replenishment, 10. Stirrer, 11. Hot water, 12.14.
15 Valve, 13... Pump, 16. 17. Line thermometer, 18-23... Hot water thermometer, TI, T2.
T3・Hot water temperature. -21= Procedural amendment 1 Indication of the case 2, Name of the invention and device Heat treatment method for steel wire 3 Relationship with the case by the person making the amendment Patent applicant address Name (21), 5-15 Kitahama, Higashi-ku, Osaka
3) Sumitomo Electric Industries, Ltd. 4, Agent 7 Representative for President 1 Tetsubu Address 7th Floor, Shin-Nakajima Building, 1-9-20 Nishinakajima, Yodoyo-ku, Osaka (Telephone: Osaka 804-8803) 5 Date of Amendment Order ■ Hair); Harm 丑→ト=-匝 Spontaneous Correction 6. In the detailed description of the subject of correction, the column for the detailed description of the invention. 7. Details of correction amount, page 16, line 11, line 12, "It will be necessary." Next to "In addition, evaporated water will be added in this way" - If circulating make-up water is required. In this method, the amount of water supplied at 20°C is limited to the amount of evaporation, and dry air is blown into the mixing tank 8 in the water supply device 5 to supplementally cool the hot water mainly by removing the latent heat of vaporization. Even if you take it”: No. in this case,
Insert "If the amount of air to be blown is appropriate (in accordance with the above example, there will be no need to discharge excess water at all.") 2- Procedural Amendment 1, Indication of Case 2, Title of Inventive Device Heat treatment method for steel wire rod 3 Relationship with the case of the person making the amendment Patent applicant address 5-15 Kitahama, Higashi-ku, Osaka Name (:1
13) Sumitomo Electric Industries, Ltd. Representative President Tetsu Kawakami Department 4 Agent Address 1-9-20-5 Nishinakajima, Yodoyo-ku, Osaka Daily voluntary amendment to amendment order 6 Drawings attached to the specification subject to amendment. 7. Contents of the amendment Figures 1 to 3 will be corrected as shown in the attached sheet. Hoshi 2 Zu Poem Haiku (Kyoda) Shouting (Shuttle)

Claims (1)

【特許請求の範囲】 （１）高温にある鋼線材を温水中又は添加剤を含む温水
溶液中に連続的に浸漬して熱処理する方法において、前
記線材のＡ、変態点直上付近からの冷却処理を、前記線
材の進行方向の少なくとも中間に温度勾配を有し、かつ
入口側の温度を沸騰点以下の低温とし、出口側の温＃全
前記入口側より高温にした前記温水又は温水溶液の槽中
に前記線材を通過せしめて行がうことを特徴とする鋼線
材の熱処理方法。 （２）　　Ａ＋変態点直上付近からの冷却処理前の予備
冷却を沸騰水又は水溶液中で行なう特許請求の範囲第１
項記載の鋼線材の熱処理方法。 （８）　　Ａ＋変態点直上付近からの冷却処理後の冷却
全沸騰水又は水溶液中で行なう特許請求の範囲第１項又
は第２項記載の鋼線材の熱処理方法。 （４）　　出口側の温度が沸騰点である特許請求の範囲
第１項、第２項又は第３項記載の鋼線材の熱処理方法。 （５）槽中の温度勾配が、蒸発によって失なわれる分を
補充する補給水を使用して作成される特許請求の範囲第
１項、第２項、第３項又は第４項記載の鋼線材の熱処理
方法。 調 （６）　　高温にある為線材が、熱間圧延された高温の
鋼線材である特許請求の範囲第１項、第２項、第３項、
第４項又は第５項記載の鋼線材の熱処理方法。 （７）　　高温にある＠ｖ４ｍ　Ｕが、再加熱された高
温の鋼線材である特許請求の範囲第１項、第２項、第３
項、第４項又は第５項記載の鋼線材の熱処理方法。[Scope of Claims] (1) A method in which a steel wire rod at high temperature is heat-treated by continuously immersing it in hot water or a hot aqueous solution containing additives, in which the wire rod is subjected to cooling treatment from just above the transformation point A. The hot water or hot aqueous solution tank has a temperature gradient at least in the middle of the traveling direction of the wire, and the temperature on the inlet side is lower than the boiling point, and the temperature on the outlet side is higher than that on the inlet side. A method for heat treatment of a steel wire, characterized in that the heat treatment is carried out by passing the wire through a steel wire. (2) Claim 1, in which preliminary cooling before the cooling process from just above the A+ transformation point is performed in boiling water or an aqueous solution.
2. Heat treatment method for steel wire rods described in Section 1. (8) The method for heat treating a steel wire rod according to claim 1 or 2, wherein the cooling treatment from just above the A+ transformation point is carried out in completely boiling water or an aqueous solution. (4) The method for heat treating a steel wire according to claim 1, 2 or 3, wherein the temperature on the outlet side is a boiling point. (5) The steel according to claim 1, 2, 3 or 4, wherein the temperature gradient in the tank is created using make-up water to replenish what is lost through evaporation. Heat treatment method for wire rods. (6) Claims 1, 2, and 3, in which the wire rod is a hot-rolled high-temperature steel wire rod because it is at a high temperature.
The method for heat treatment of steel wire according to item 4 or 5. (7) Claims 1, 2, and 3, in which @v4m U at high temperature is a reheated high-temperature steel wire.
The method for heat treatment of steel wire according to item 4, item 5, or item 5.