JPH0925582A - Production of pipe lined with metal on inside surface - Google Patents
Production of pipe lined with metal on inside surfaceInfo
- Publication number
- JPH0925582A JPH0925582A JP22077096A JP22077096A JPH0925582A JP H0925582 A JPH0925582 A JP H0925582A JP 22077096 A JP22077096 A JP 22077096A JP 22077096 A JP22077096 A JP 22077096A JP H0925582 A JPH0925582 A JP H0925582A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- pipe
- tube
- layer
- metal
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は内面に耐食性，耐摩
耗性に富んだ金属ライニング層を形成した管を製造する
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 producing a pipe having an inner surface provided with a metal lining layer having excellent corrosion resistance and wear resistance.
【０００２】[0002]
【従来の技術】コンクリ−トやスラリ−などの押出や輸
送に用いられる管は摩耗や腐食などの過酷な雰囲気下に
さらされる。このため、管内面に各種表面処理が施され
た物を必要とすることが多くなる訳であるが、焼入れ品
や窒化品等では耐食性に著しく乏しく、内面をステンレ
スとしたクラッド鋼管等にあっては耐摩耗性に劣るとい
う欠点があった。2. Description of the Related Art Pipes used for extrusion and transportation of concrete and slurries are exposed to a severe atmosphere such as wear and corrosion. For this reason, it is often the case that the inner surface of the pipe is required to be subjected to various surface treatments, but hardened products and nitrided products have extremely poor corrosion resistance, and clad steel pipes with an inner surface made of stainless steel Had the drawback of being poor in wear resistance.
【０００３】また、耐食性，耐摩耗性を兼ね備えた物と
しては、樹脂ライニング品やセラミックライニング品が
存在するが、樹脂ライニングは今一つ耐摩耗性に乏し
く、強い擦過力を受けると、ライニング層の剥離という
事態も生じ、一方、耐食性，耐摩耗性に優れたセラミッ
クライニングにあっても、前述のような問題点を生じる
ことが多々あった。There are resin lining products and ceramic lining products that have both corrosion resistance and wear resistance. However, resin linings have poor wear resistance and peeling of the lining layer when subjected to a strong rubbing force. However, the above-mentioned problems often occur even in a ceramic lining excellent in corrosion resistance and wear resistance.
【０００４】上記のような従来技術の問題点を解決する
ために、以下のようなことが行なわれてきたが、それで
もなお十分な効果を得られるまでには至っていない。即
ち、 ａ 耐摩耗性をあげるために、ＷＣ粒等をライニング皮
膜に入れることが行なわれており、その方法として、管
を回転させた状態でライニング材を管内に供給し、遠心
力により管内面にライニング材の層を形成させて加熱す
る方法が採られているが、この方法では、ライニング皮
膜溶融形成時にも回転を付与したままであると、遠心力
が加わって比重差によりＷＣ粒等は沈み込む形となるた
め、耐摩耗性が改善されないばかりでなく、皮膜と母材
境界部にＷＣ粒等が集中し、皮膜の密着強度が下がると
いう難点があり、更に、前記粉末の溶融温度はそれらの
焼結温度よりも数百度も高いため、粉末が溶融するまで
温度を上げたまま回転を付与することは、非常に危険で
あると同時にそれに付帯する設備費が著しく高いものと
なる。 ｂ また、曲管についてみると、耐食性，耐摩耗性に富
んだ内面ライニング曲管として、内面にセラミックをラ
イニングした曲管があるが、セラミック部が脆くて耐衝
撃性に乏しいばかりでなく、セラミックライニング曲管
は製造特性上、厚盛（20mm以上）とならざるを得ないた
め、所望の内径のものを得ようとすれば、母管には大径
の物が必要となるので，コスト高，重量増が不可避とな
るし、セラミックは熱膨張率が母材（Fe，SUS等）のそ
れと較べ著しく小さいため、使用時の熱膨張・収縮によ
りライニング層が剥れるおそれもあり、更に、セラミッ
クライニイング曲管は必要部分のみのライニングが困難
であるという難点があるのである。In order to solve the above-mentioned problems of the prior art, the followings have been carried out, but none of them have achieved a sufficient effect. That is, a In order to improve wear resistance, WC particles and the like are put in the lining film. As a method for this, the lining material is supplied into the pipe while the pipe is rotated, and the inner surface of the pipe is centrifugally driven. A method of forming a layer of lining material and heating is adopted, but in this method, if rotation is still applied even when the lining film is melted and formed, centrifugal force is applied and WC particles and the like are separated due to a difference in specific gravity. Since it is a form that sinks, not only is the wear resistance not improved, but there are the drawbacks that WC grains, etc. concentrate at the boundary between the coating and the base material, and the adhesion strength of the coating decreases, and the melting temperature of the powder is Since they are several hundred degrees higher than the sintering temperature, it is very dangerous to apply the rotation while the temperature is raised until the powder is melted, and at the same time, the equipment cost accompanying the rotation is extremely high. b Regarding curved pipes, there is a curved pipe with a ceramic lining on the inner surface as an inner lining curved pipe with excellent corrosion resistance and wear resistance. However, not only is the ceramic part fragile and poor in impact resistance, Due to the manufacturing characteristics, the lining curved pipe must be thick (20 mm or more). Therefore, if a pipe with a desired inner diameter is to be obtained, a large diameter pipe is required for the mother pipe, resulting in high cost. The weight increase is inevitable, and the coefficient of thermal expansion of ceramics is significantly smaller than that of base materials (Fe, SUS, etc.), so the lining layer may peel off due to thermal expansion and contraction during use. The lined curved pipe has a drawback that it is difficult to line only a necessary portion.
【０００５】[0005]
【発明が解決しようとする課題】本発明は上述のような
従来技術の問題点に鑑み、溶射あるいは溶接用等のNi基
またはCo基等の自溶合金粉末、もしくはこれらにセラミ
ック粉末等を含ませた混合粉末を用いて管内面に耐食
性，耐摩耗性に優れたライニング層を形成しようとする
ことを課題とするものである。In view of the problems of the prior art as described above, the present invention includes a self-fluxing alloy powder such as Ni-based or Co-based for thermal spraying or welding, or a ceramic powder or the like. The problem is to form a lining layer with excellent corrosion resistance and wear resistance on the inner surface of the pipe by using the mixed powder.
【０００６】[0006]
【課題を解決するための手段】上記の課題を解決するこ
とを目的としてなされた本発明の構成は、内面に耐食
性，耐摩耗性に富んだ金属ライニング層を有する管を製
造するに当り、素管をその内表面における遠心力が３Ｇ
以上になるように回転させた状態で金属粉末を該管内面
の必要とする範囲全周に均一になるように一時にまたは
連続的に供給して金属粉末層を形成した後、該管をその
内面または外面若しくは内外面から前記粉末層が焼結状
態を呈する温度まで加熱して前記粉末層を管内壁に付着
させてから回転を停止し、次いで前記管を部分的かつ連
続的にもしくは全体を一度にその内壁温度が前記粉末の
溶融温度以上になるように加熱して管内壁に付着した粉
末層を溶融，拡散させることにより、管内面に金属ライ
ニング層を形成することを主な特徴とするものである。The structure of the present invention, which has been made for the purpose of solving the above-mentioned problems, has been adopted in the production of a pipe having a metal lining layer having an excellent corrosion resistance and wear resistance on the inner surface. The centrifugal force on the inner surface of the tube is 3G
After the metal powder was rotated as described above, the metal powder was supplied at one time or continuously so as to be uniform over the entire circumference of the required area of the inner surface of the tube to form a metal powder layer, and then the tube was The powder layer is heated from the inner surface or the outer surface or the inner or outer surface to a temperature at which the powder layer exhibits a sintered state to adhere the powder layer to the inner wall of the tube, and then rotation is stopped, and then the tube is partially and continuously or entirely. The main feature is that a metal lining layer is formed on the inner surface of the pipe by heating the inner wall temperature at a temperature above the melting temperature of the powder to melt and diffuse the powder layer adhering to the inner wall of the pipe. It is a thing.
【０００７】[0007]
【発明の実施の形態】次に、本発明の具体的な方法を図
により詳細に説明する。図１は粉末供給及び粉末の焼結
方法を模式的に示したものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a specific method of the present invention will be described in detail with reference to the drawings. FIG. 1 schematically shows a method of supplying powder and sintering the powder.
【０００８】回転台１に直管２を取付ける。この後、管
内表面の遠心力が３Ｇ以上になるように回転を与えたま
ま粉末供給槍４を逐次移動させる。この時、粉末供給槍
４から供給された金属粉末５は管内壁に均一に分散し、
粉末層を形成する。次いで、この粉末層を管２の内面又
は外面、若しくは内外両面に設けた加熱源例えば高周波
誘導加熱コイル３によって粉末層が焼結粉末層６に変化
する温度、例えば800℃程度になるまで加熱,昇温するこ
とにより、粉末層を焼結粉末層６として管２内面に付着
形成することができる。The straight pipe 2 is attached to the turntable 1. After that, the powder supply spear 4 is sequentially moved while being rotated so that the centrifugal force on the inner surface of the tube becomes 3 G or more. At this time, the metal powder 5 supplied from the powder supply spear 4 is uniformly dispersed on the inner wall of the pipe,
Form a powder layer. Then, this powder layer is heated to a temperature at which the powder layer changes to a sintered powder layer 6, for example, about 800 ° C. by a heating source such as a high frequency induction heating coil 3 provided on the inner surface or outer surface of the tube 2, or both inner and outer surfaces, By raising the temperature, the powder layer can be adhered and formed as the sintered powder layer 6 on the inner surface of the tube 2.
【０００９】このようにして内面に焼結粉末層６を形成
させた管２（以下、「金属粉末焼結管」という）を、静
止させた状態で、高周波誘導加熱コイル３により金属粉
末５の溶融温度以上、例えば1000〜1100℃に加熱するこ
とによって、焼結粉末層６を溶融，拡散させ、冷却すれ
ば、内面に耐食性，耐摩耗性の良好な金属ライニング層
７が形成された管を製造することができるのである。The tube 2 having the sintered powder layer 6 formed on the inner surface thereof (hereinafter referred to as "metal powder sintered tube") is kept stationary, and the high frequency induction heating coil 3 is used to remove the metal powder 5. When the sintered powder layer 6 is melted and diffused by heating at a melting temperature or higher, for example, 1000 to 1100 ° C., and cooled, a pipe having a metal lining layer 7 having good corrosion resistance and wear resistance formed on the inner surface is obtained. It can be manufactured.
【００１０】尚、上記実施例においては、加熱源として
高周波誘導加熱コイル３を用い、管２を外面から加熱す
るようにしたが、加熱源としてはこれに限られず、他の
ものでも良く、管２の内面又は内外両面から加熱するよ
うにしても良い。また、加熱源として高周波誘導加熱コ
イル３を用いた場合は、焼結粉末層が焼結状態で導電性
を生じるため、溶融，拡散のための加熱時に粉末自体が
誘導加熱されるので、溶融，拡散が極めて良好に行なわ
れ、良質な金属ライニング層を得られる。In the above embodiment, the high frequency induction heating coil 3 is used as the heating source to heat the tube 2 from the outer surface, but the heating source is not limited to this, and any other heating source may be used. You may make it heat from 2 inner surfaces or both inner and outer surfaces. When the high-frequency induction heating coil 3 is used as the heating source, the sintered powder layer is conductive in the sintered state, so that the powder itself is induction-heated during heating for melting and diffusion. The diffusion is extremely good and a good quality metal lining layer is obtained.
【００１１】また、上記の金属粉末焼結管を従来公知の
熱間曲げ方法により曲げ加工すれば、内面金属ライニン
グ曲管を製造することができる。即ち、図２において、
11は軸12を中心として旋回自在な曲げアーム、13は該ア
ーム11に設けたクランプ、14は案内ローラで、以上によ
り公知の熱間曲げ装置を構成し、金属粉末焼結管を案内
ローラ14，14間を通してその先端部をクランプ13により
緊締し、管２をその後端側から推進すると共に高周波誘
導加熱コイル３により該管２の外側から焼結粉末層６が
溶融する温度、例えば980℃直下まで加熱し、加熱の直
後冷却すれば、管２が加熱部において連続して曲げられ
ると同時に加熱された焼結粉末層６は溶融，拡散され、
管２の内面に強固に積層された金属ライニング層７とな
り、内面金属ライニング曲管が得られるのである。If the above-mentioned metal powder sintered tube is bent by a conventionally known hot bending method, an inner metal lined bent tube can be manufactured. That is, in FIG.
Reference numeral 11 denotes a bending arm which is rotatable about an axis 12, 13 is a clamp provided on the arm 11, 14 is a guide roller, and the above-described known hot bending apparatus is configured to guide the metal powder sintering tube to the guide roller 14 , 14 is clamped at its tip by a clamp 13, the tube 2 is propelled from its rear end side, and the high-frequency induction heating coil 3 melts the sintered powder layer 6 from the outside of the tube 2, for example, just below 980 ° C. If heated to and cooled immediately after heating, the tube 2 is continuously bent in the heating part, and at the same time the heated sintered powder layer 6 is melted and diffused,
The metal lining layer 7 is firmly laminated on the inner surface of the tube 2, and the inner surface metal lining bent tube is obtained.
【００１２】実際に本発明方法により内面金属ライニン
グ管を製造した例について示せば、次の通りである。 An example of actually manufacturing an inner metal lining tube by the method of the present invention is as follows.
【００１３】以上により、内面に耐食性，耐摩耗性に優
れた金属ライニング層を有する曲管を製作したところ、
曲管内面の引張り側に厚さ1.5〜1.9mm、圧縮側に厚さ2.
0〜2.4mmの金属層が形成され、該曲管の寿命は同一硬さ
焼入曲管の10倍以上にも達した。As described above, a curved pipe having a metal lining layer having excellent corrosion resistance and wear resistance on the inner surface was manufactured.
A thickness of 1.5 to 1.9 mm on the tension side of the inner surface of the curved pipe, and a thickness on the compression side 2.
A metal layer having a thickness of 0 to 2.4 mm was formed, and the life of the bent tube reached more than 10 times that of the quenched bent tube of the same hardness.
【００１４】また、本発明方法は同様にして、端部又は
中間部にある直管部を含み、連続して内面金属ライニン
グされた曲管を製造することができる。即ち、金属粉末
焼結管を上記熱間曲げ装置で曲げ加工する際、直管部と
すべき部分に加熱部位が占位する場合は、該管２をクラ
ンプ13から開放した状態として、加熱，推進のみを行な
って、直管のまま焼結粉末層６を溶融，拡散させ、曲管
部とすべき部分に加熱部位が到達した場合は、曲げ開始
状態に配備したクランプ13により管２を緊締し、加熱曲
げを続けることにより、所望の部分に直管部を有し、且
つ、連続して金属ライニング層が積層された内面金属ラ
イニング曲管が得られるのである。Further, the method of the present invention can also similarly manufacture a curved pipe having a straight pipe portion at an end portion or an intermediate portion and having an inner surface metal lined continuously. That is, when the metal powder sintered tube is bent by the hot bending apparatus, if the heating portion occupies the portion which should be the straight tube portion, the tube 2 is released from the clamp 13 and heated. When only the propulsion is performed, the sintered powder layer 6 is melted and diffused as it is as a straight tube, and when the heated portion reaches the portion which should be the bent tube portion, the tube 13 is tightened by the clamp 13 arranged at the bending start state. Then, by continuing the heating and bending, an inner metal lining bent pipe having a straight pipe portion at a desired portion and having metal lining layers continuously laminated can be obtained.
【００１５】一般に、内面金属ライニング曲管を製造す
る場合、あらかじめ溶融，溶接等により管内面に特殊金
属層を形成した直管に曲げ加工を施そうとすると、これ
ら金属層は延性に乏しいため、曲げ加工時のわずかな変
形によってもワレを生じ、且つ、強い引けによりワレを
生じたまま溶融を行なうと、更にワレが助長され、良好
な表面肌を得ることは極めて困難となる。Generally, in the case of manufacturing an inner surface metal lining curved pipe, when a straight pipe having a special metal layer formed on the inner surface of the pipe by melting, welding or the like is subjected to bending, these metal layers have poor ductility, If a slight deformation during bending causes cracks, and if melting is performed while the cracks are generated due to strong shrinkage, the cracks are further promoted and it becomes extremely difficult to obtain a good surface texture.
【００１６】然し乍ら、本発明方法によれば、金属粉末
が焼結状態からの加熱曲げが可能となるばかりでなく、
加熱にしても必要最少回数ですむから、加熱による母材
の劣化を軽減するができる。However, according to the method of the present invention, not only the metal powder can be heated and bent from the sintered state, but also
Even if it is heated, it is possible to reduce the deterioration of the base material due to heating because it is the minimum number of times required.
【００１７】[0017]
【発明の効果】本発明は上述の通りであるから、耐食
性，耐摩耗性の内面金属ライニング直管ないし曲管の製
造方法として好適である。INDUSTRIAL APPLICABILITY Since the present invention is as described above, it is suitable as a method for producing a corrosion-resistant and wear-resistant inner surface metal lining straight pipe or curved pipe.
【図１】本発明方法により内面金属ライニング管を製造
するところを示す断面図。FIG. 1 is a cross-sectional view showing the production of an inner metal lining pipe by the method of the present invention.
【図２】図の１方法により製造された内面金属ライニン
グ管を曲げ加工する状態を示す平面図。FIG. 2 is a plan view showing a state in which an inner metal lining tube manufactured by the method shown in FIG. 1 is bent.
１ 回転台 ２ 管 ３ 高周波誘導加熱コイル ４ 粉末供給槍 ５ 金属粉末 ６ 焼結粉末層 ７ 金属層 1 rotary table 2 tube 3 high frequency induction heating coil 4 powder supply spear 5 metal powder 6 sintered powder layer 7 metal layer
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成８年８月３０日[Submission date] August 30, 1996
【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】全文[Correction target item name] Full text
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【書類名】 明細書[Document Name] Statement
【発明の名称】 内面金属ライニング管の製造方
法Title: Manufacturing method of inner surface metal lining pipe
【特許請求の範囲】[Claims]
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【発明の属する技術分野】本発明は内面に耐食性，耐摩
耗性に富んだ金属ライニング層を形成した管を製造する
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 producing a pipe having an inner surface provided with a metal lining layer having excellent corrosion resistance and wear resistance.
【０００２】[0002]
【従来の技術】コンクリートやスラリーなどの押出や輸
送に用いられる管は摩耗や腐食などの過酷な雰囲気下に
さらされる。このため、管内面に各種表面処理が施され
た物を必要とすることが多くなる訳であるが、焼入れ品
や窒化品等では耐食性に著しく乏しく、内面をステンレ
スとしたクラッド鋼管等にあっては耐摩耗性に劣るとい
う欠点があった。2. Description of the Related Art Pipes used for extrusion and transportation of concrete and slurry are exposed to a severe atmosphere such as wear and corrosion. For this reason, it is often the case that the inner surface of the pipe is required to be subjected to various surface treatments, but hardened products and nitrided products have extremely poor corrosion resistance, and clad steel pipes with an inner surface made of stainless steel Had the drawback of being poor in wear resistance.
【０００３】また、耐食性，耐摩耗性を兼ね備えた物と
しては、樹脂ライニング品やセラミックライニング品が
存在するが、樹脂ライニングは今一つ耐摩耗性に乏し
く、強い擦過力を受けると、ライニング層の剥離という
事態も生じ、一方、耐食性，耐摩耗性に優れたセラミッ
クライニングにあっても、前述のような問題点を生じる
ことが多々あった。There are resin lining products and ceramic lining products that have both corrosion resistance and wear resistance. However, resin linings have poor wear resistance and peeling of the lining layer when subjected to a strong rubbing force. However, the above-mentioned problems often occur even in a ceramic lining excellent in corrosion resistance and wear resistance.
【０００４】上記のような従来技術の問題点を解決する
ために、以下のようなことが行なわれてきたが、それで
もなお十分な効果を得られるまでには至っていない。即
ち、 ａ 耐摩耗性をあげるために、ＷＣ粒等をライニング皮
膜に入れることが行なわれており、その方法として、管
を回転させた状態でライニング材を管内に供給し、遠心
力により管内面にライニング材の層を形成させて加熱す
る方法が採られているが、この方法では、ライニング皮
膜溶融形成時にも回転を付与したままであると、遠心力
が加わって比重差によりＷＣ粒等は沈み込む形となるた
め、耐摩耗性が改善されないばかりでなく、皮膜と母材
境界部にＷＣ粒等が集中し、皮膜の密着強度が下がると
いう難点があり、更に、前記粉末の溶融温度はそれらの
焼結温度よりも数百度も高いため、粉末が溶融するまで
温度を上げたまま回転を付与することは、非常に危険で
あると同時にそれに付帯する設備費が著しく高いものと
なる。 ｂ また、曲管についてみると、耐食性，耐摩耗性に富
んだ内面ライニング曲管として、内面にセラミックをラ
イニングした曲管があるが、セラミック部が脆くて耐衝
撃性に乏しいばかりでなく、セラミックライニング曲管
は製造特性上、厚盛（２０ｍｍ以上）とならざるを得な
いため、所望の内径のものを得ようとすれば、母管には
大径の物が必要となるので，コスト高，重量増が不可避
となるし、セラミックは熱膨張率が母材（Ｆｅ，ＳＵＳ
等）のそれと較べ著しく小さいため、使用時の熱膨張・
収縮によりライニング層が剥れるおそれもあり、更に、
セラミックライニイング曲管は必要部分のみのライニン
グが困難であるという難点があるのである。In order to solve the above-mentioned problems of the prior art, the followings have been carried out, but none of them have achieved a sufficient effect. That is, a In order to improve wear resistance, WC particles and the like are put in the lining film. As a method for this, the lining material is supplied into the pipe while the pipe is rotated, and the inner surface of the pipe is centrifugally driven. A method of forming a layer of lining material and heating is adopted, but in this method, if rotation is still applied even when the lining film is melted and formed, centrifugal force is applied and WC particles and the like are separated due to a difference in specific gravity. Since it is a form that sinks, not only is the wear resistance not improved, but there are the drawbacks that WC grains, etc. concentrate at the boundary between the coating and the base material, and the adhesion strength of the coating decreases, and the melting temperature of the powder is Since they are several hundred degrees higher than the sintering temperature, it is very dangerous to apply the rotation while the temperature is raised until the powder is melted, and at the same time, the equipment cost accompanying the rotation is extremely high. b Regarding curved pipes, there is a curved pipe with a ceramic lining on the inner surface as an inner lining curved pipe with excellent corrosion resistance and wear resistance. However, not only is the ceramic part fragile and poor in impact resistance, Due to the manufacturing characteristics, the lining curved pipe must be thick (20 mm or more). Therefore, if a pipe with a desired inner diameter is to be obtained, the mother pipe must have a large diameter, resulting in high cost. ， Increase of weight is unavoidable, and the coefficient of thermal expansion of ceramic is base material (Fe, SUS
Since it is significantly smaller than that of
The shrinkage may cause the lining layer to peel off.
Ceramic lined curved tubes have the drawback that it is difficult to line only the necessary parts.
【０００５】[0005]
【発明が解決しようとする課題】本発明は上述のような
従来技術の問題点に鑑み、溶射あるいは溶接用等のＮｉ
基またはＣｏ基等の自溶合金粉末、もしくはこれらにセ
ラミック粉末等を含ませた混合粉末を用いて管内面に耐
食性，耐摩耗性に優れたライニング層を形成しようとす
ることを課題とするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and thus Ni for thermal spraying or welding is used.
An object of the present invention is to form a lining layer having excellent corrosion resistance and wear resistance on the inner surface of a pipe by using a self-fluxing alloy powder such as a base or Co base, or a mixed powder containing a ceramic powder or the like. Is.
【０００６】[0006]
【課題を解決するための手段】上記の課題を解決するこ
とを目的としてなされた本発明の構成は、内面に耐食
性，耐摩耗性に富んだ金属ライニング層を有する管を製
造するに当り、素管をその内表面における遠心力が３Ｇ
以上になるように回転させた状態で金属粉末を該管内面
の必要とする範囲全周に均一になるように一時にまたは
連続的に供給して金属粉末層を形成した後、該管をその
内面または外面若しくは内外面から前記粉末層が焼結状
態を呈する温度まで加熱して前記粉末層を管内壁に付着
させてから回転を停止し、次いで前記管を部分的かつ連
続的にもしくは全体を一度にその内壁温度が前記粉末の
溶融温度以上になるように加熱して管内壁に付着した粉
末層を溶融，拡散させることにより、管内面に金属ライ
ニング層を形成することを主な特徴とするものである。The structure of the present invention, which has been made for the purpose of solving the above-mentioned problems, has been adopted in the production of a pipe having a metal lining layer having an excellent corrosion resistance and wear resistance on the inner surface. The centrifugal force on the inner surface of the tube is 3G
After the metal powder was rotated as described above, the metal powder was supplied at one time or continuously so as to be uniform over the entire circumference of the required area of the inner surface of the tube to form a metal powder layer, and then the tube was The powder layer is heated from the inner surface or the outer surface or the inner or outer surface to a temperature at which the powder layer exhibits a sintered state to adhere the powder layer to the inner wall of the tube, and then rotation is stopped, and then the tube is partially and continuously or entirely. The main feature is that a metal lining layer is formed on the inner surface of the pipe by heating the inner wall temperature at a temperature above the melting temperature of the powder to melt and diffuse the powder layer adhering to the inner wall of the pipe. It is a thing.
【０００７】[0007]
【発明の実施の形態】次に、本発明の具体的な方法を図
により詳細に説明する。図１は粉末供給及び粉末の焼結
方法を模式的に示したものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a specific method of the present invention will be described in detail with reference to the drawings. FIG. 1 schematically shows a method of supplying powder and sintering the powder.
【０００８】回転台１に直管２を取付ける。この後、管
内表面の遠心力が３Ｇ以上になるように回転を与えたま
ま粉末供給槍４を逐次移動させる。この時、粉末供給槍
４から供給された金属粉末５は管内壁に均一に分散し、
粉末層を形成する。次いで、この粉末層を管２の内面又
は外面、若しくは内外両面に設けた加熱源例えば高周波
誘導加熱コイル３によって粉末層が焼結粉末層６に変化
する温度、例えば８００℃程度になるまで加熱，昇温す
ることにより、粉末層を焼結粉末層６として管２内面に
付着形成することができる。The straight pipe 2 is attached to the turntable 1. After that, the powder supply spear 4 is sequentially moved while being rotated so that the centrifugal force on the inner surface of the tube becomes 3 G or more. At this time, the metal powder 5 supplied from the powder supply spear 4 is uniformly dispersed on the inner wall of the pipe,
Form a powder layer. Then, the powder layer is heated by a heating source such as a high frequency induction heating coil 3 provided on the inner surface or outer surface of the tube 2 or both inner and outer surfaces until the temperature at which the powder layer changes to the sintered powder layer 6, for example, about 800 ° C., By raising the temperature, the powder layer can be adhered and formed as the sintered powder layer 6 on the inner surface of the tube 2.
【０００９】このようにして内面に焼結粉末層６を形成
させた管２（以下、「金属粉末焼結管」という）を、静
止させた状態で、高周波誘導加熱コイル３により金属粉
末５の溶融温度以上、例えば１０００〜１１００℃に加
熱することによって、焼結粉末層６を溶融，拡散させ、
冷却すれば、内面に耐食性，耐摩耗性の良好な金属ライ
ニング層７が形成された管を製造することができるので
ある。The tube 2 having the sintered powder layer 6 formed on the inner surface thereof (hereinafter referred to as "metal powder sintered tube") is kept stationary, and the high frequency induction heating coil 3 is used to remove the metal powder 5. By heating to a melting temperature or higher, for example, 1000 to 1100 ° C., the sintered powder layer 6 is melted and diffused,
If cooled, it is possible to manufacture a pipe having a metal lining layer 7 having excellent corrosion resistance and wear resistance formed on the inner surface.
【００１０】尚、上記実施例においては、加熱源として
高周波誘導加熱コイル３を用い、管２を外面から加熱す
るようにしたが、加熱源としてはこれに限られず、他の
ものでも良く、管２の内面又は内外両面から加熱するよ
うにしても良い。また、加熱源として高周波誘導加熱コ
イル３を用いた場合は、焼結粉末層が焼結状態で導電性
を生じるため、溶融，拡散のための加熱時に粉末自体が
誘導加熱されるので、溶融，拡散が極めて良好に行なわ
れ、良質な金属ライニング層を得られる。In the above embodiment, the high frequency induction heating coil 3 is used as the heating source to heat the tube 2 from the outer surface, but the heating source is not limited to this, and any other heating source may be used. You may make it heat from 2 inner surfaces or both inner and outer surfaces. When the high-frequency induction heating coil 3 is used as the heating source, the sintered powder layer is conductive in the sintered state, so that the powder itself is induction-heated during heating for melting and diffusion. The diffusion is extremely good and a good quality metal lining layer is obtained.
【００１１】また、上記の金属粉末焼結管を従来公知の
熱間曲げ方法により曲げ加工すれば、内面金属ライニン
グ曲管を製造することができる。即ち、図２において、
１１は軸１２を中心として旋回自在な曲げアーム、１３
は該アーム１１に設けたクランプ、１４は案内ローラ
で、以上により公知の熱間曲げ装置を構成し、金属粉末
焼結管を案内ローラ１４，１４間を通してその先端部を
クランプ１３により緊締し、管２をその後端側から推進
すると共に高周波誘導加熱コイル３により該管２の外側
から焼結粉末層６が溶融する温度、例えば９８０℃直下
まで加熱し、加熱の直後冷却すれば、管２が加熱部にお
いて連続して曲げられると同時に加熱された焼結粉末層
６は溶融，拡散され、管２の内面に強固に積層された金
属ライニング層７となり、内面金属ライニング曲管が得
られるのである。If the above-mentioned metal powder sintered tube is bent by a conventionally known hot bending method, an inner metal lined bent tube can be manufactured. That is, in FIG.
Reference numeral 11 denotes a bending arm that is rotatable about an axis 12, and 13
Is a clamp provided on the arm 11, and 14 is a guide roller, which constitutes a known hot bending apparatus as described above. The metal powder sintered tube is passed between the guide rollers 14 and 14 and the tip thereof is tightened by the clamp 13. When the tube 2 is propelled from the rear end side and is heated by the high frequency induction heating coil 3 from the outside of the tube 2 to a temperature at which the sintered powder layer 6 is melted, for example, just below 980 ° C., and immediately after heating, the tube 2 is cooled. The sintered powder layer 6 which is continuously bent and heated at the same time in the heating section is melted and diffused to become the metal lining layer 7 firmly laminated on the inner surface of the tube 2, and the inner surface metal lining curved tube is obtained. .
【００１２】実際に本発明方法により内面金属ライニン
グ管を製造した例について示せば、次の通りである。 （鋼管）ＳＴＰＧ ４Ｂ×Ｓｃｈ４０ 寸法：φ１１４．３×φ１０２．３×１１５００ 組成：Ｃ ０．２５％，Ｓｉ ０．３５％、Ｍｎ ０．３０％ Ｐ ０．０４、Ｓ ０．０４％ （粉末）ＭＳＦＮｉ５ Ｎｉ基自溶合金 使用量：１０ｋｇ （焼結方法）高周波誘導外面加熱 ８００℃ 加熱条件：周波数 ２ＫＨｚ 送り速度 ２ｍｍ／ｓｅｃ 電力料 ４０ＫＷｈ 回転速度：３００ｒｐｍ （溶融，拡散，冷却方法） 高周波誘導外面加熱＋強制空冷９８０℃An example of actually manufacturing an inner metal lining tube by the method of the present invention is as follows. (Steel pipe) STPG 4B × Sch40 Dimensions: φ114.3 × φ102.3 × 11500 Composition: C 0.25%, Si 0.35%, Mn 0.30% P 0.04, S 0.04% (powder) MSFNi5 Ni-based self-fluxing alloy Usage: 10 kg (Sintering method) High frequency induction outer surface heating 800 ° C Heating conditions: Frequency 2 KHz Feed rate 2 mm / sec Electric power 40 KWh Rotation speed: 300 rpm (Melting, diffusion, cooling method) High frequency induction outer surface heating + Forced air cooling 980 ℃
【００１３】以上により、内面に耐食性，耐摩耗性に優
れた金属ライニング層を有する管を製作したところ、管
内面の引張り側に厚さ１．５〜１．９ｍｍ、圧縮側に厚
さ２．０〜２．４ｍｍの金属層が形成され、該管の寿命
は同一硬さ焼入曲管の１０倍以上にも達した。As described above, when a pipe having a metal lining layer having excellent corrosion resistance and wear resistance on the inner surface was manufactured, a thickness of 1.5 to 1.9 mm on the tensile side of the inner surface of the tube and a thickness of 2. on the compression side. A metal layer having a thickness of 0 to 2.4 mm was formed, and the life of the tube reached 10 times or more that of a quench-hardened bent tube having the same hardness.
【００１４】次に、本発明方法の技術を応用すると、端
部又は中間部にある直管部を含み、連続して内面金属ラ
イニングされた曲管を製造することができる。即ち、金
属粉末焼結管を上記熱間曲げ装置で曲げ加工する際、直
管部とすべき部分に加熱部位が占位する場合は、該管２
をクランプ１３から開放した状態として、加熱，推進の
みを行なって、直管のまま焼結粉末層６を溶融，拡散さ
せ、曲管部とすべき部分に加熱部位が到達した場合は、
曲げ開始状態に配備したクランプ１３により管２を緊締
し、加熱曲げを続けることにより、所望の部分に直管部
を有し、且つ、連続して金属ライニング層が積層された
内面金属ライニング曲管が得られるのである。Next, by applying the technique of the present invention, it is possible to continuously manufacture a curved pipe having a straight pipe portion at an end portion or an intermediate portion and having an inner surface metal lined. That is, when the metal powder sintered tube is bent by the hot bending apparatus, if the heating portion occupies the portion that should be the straight tube portion, the tube 2
In a state where the clamp 13 is released from the clamp 13, only heating and propulsion are performed to melt and diffuse the sintered powder layer 6 as a straight pipe, and when the heated portion reaches the portion to be the curved pipe portion,
An inner metal lining bent pipe having a straight pipe portion at a desired portion and having a continuous metal lining layer by tightening the pipe 2 with a clamp 13 arranged in a bending start state and continuing heating and bending. Is obtained.
【００１５】一般に、内面金属ライニング曲管を製造す
る場合、あらかじめ溶融，溶接等により管内面に特殊金
属層を形成した直管に曲げ加工を施そうとすると、これ
ら金属層は延性に乏しいため、曲げ加工時のわずかな変
形によってもワレを生じ、且つ、強い引けによりワレを
生じたまま溶融を行なうと、更にワレが助長され、良好
な表面肌を得ることは極めて困難となる。Generally, in the case of manufacturing an inner surface metal lining curved pipe, when a straight pipe having a special metal layer formed on the inner surface of the pipe by melting, welding or the like is subjected to bending, these metal layers have poor ductility, If a slight deformation during bending causes cracks, and if melting is performed while the cracks are generated due to strong shrinkage, the cracks are further promoted and it becomes extremely difficult to obtain a good surface texture.
【００１６】然し乍ら、本発明方法を応用すれば、金属
粉末が焼結状態からの加熱曲げが可能となるばかりでな
く、加熱にしても必要最少回数ですむから、加熱による
母材の劣化を軽減することができる。However, if the method of the present invention is applied, not only the metal powder can be heated and bent from the sintered state, but also the heating can be performed with the minimum required number of times, so that the deterioration of the base material due to the heating can be reduced. can do.
【００１７】[0017]
【発明の効果】本発明は上述の通りであるから、耐食
性，耐摩耗性の内面金属ライニング直管の製造方法とし
て好適である。Industrial Applicability Since the present invention is as described above, it is suitable as a method for producing a straight pipe with a metal lining having corrosion resistance and wear resistance.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明方法により内面金属ライニング管を製造
するところを示す断面図。FIG. 1 is a cross-sectional view showing the production of an inner metal lining pipe by the method of the present invention.
【図２】図の１方法を応用して内面金属ライニング管を
曲げ加工する状態を示す平面図。FIG. 2 is a plan view showing a state in which an inner metal lining pipe is bent by applying the method shown in FIG.
【符号の説明】 １ 回転台 ２ 管 ３ 高周波誘導加熱コイル ４ 粉末供給槍 ５ 金属粉末 ６ 焼結粉末層 ７ 金属層[Explanation of symbols] 1 rotary table 2 tube 3 high frequency induction heating coil 4 powder supply spear 5 metal powder 6 sintered powder layer 7 metal layer
Claims (2)
イニング層を有する直管を製造するに当り、素管をその
内表面における遠心力が３Ｇ以上になるように回転させ
た状態で金属粉末を該管内面の必要とする範囲全周に均
一になるように一時にまたは連続的に供給して金属粉末
層を形成した後、該管をその内面または外面若しくは内
外面から前記粉末層が焼結状態を呈する温度まで加熱し
て前記粉末層を管内壁に付着させてから回転を停止し、
次いで前記管を部分的かつ連続的にもしくは全体を一度
にその内壁温度が前記粉末の溶融温度以上になるように
加熱して管内壁に付着した粉末層を溶融，拡散させるこ
とにより、管内面に金属ライニング層を形成することを
特徴とする内面金属ライニング管の製造方法。1. When manufacturing a straight pipe having a metal lining layer having excellent corrosion resistance and wear resistance on the inner surface, the metal is kept in a state in which the centrifugal force on the inner surface is rotated to 3 G or more. The powder is fed at one time or continuously so as to be uniform over the entire required area of the inner surface of the tube to form a metal powder layer, and then the tube is covered with the powder layer from its inner surface or outer surface or inner / outer surface. The powder layer is heated to a temperature at which it is in a sintered state to adhere the powder layer to the inner wall of the tube, and then rotation is stopped,
Then, the tube is partially and continuously or entirely heated at a time so that the inner wall temperature thereof is equal to or higher than the melting temperature of the powder to melt and diffuse the powder layer adhering to the inner wall of the tube. A method for manufacturing an inner metal lining tube, which comprises forming a metal lining layer.
溶融，拡散させる際の加熱方法を高周波誘導加熱とし、
前記粉末層をそれが焼結状態で生じた導電性により誘導
加熱する特許請求の範囲第１項に記載の方法。2. A heating method for melting and diffusing a powder layer adhered to the inner wall of the tube in a sintered state is high frequency induction heating,
A method according to claim 1 wherein the powder layer is induction heated by the conductivity it produces in the sintered state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22077096A JPH0925582A (en) | 1996-08-05 | 1996-08-05 | Production of pipe lined with metal on inside surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22077096A JPH0925582A (en) | 1996-08-05 | 1996-08-05 | Production of pipe lined with metal on inside surface |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62181756A Division JP2607088B2 (en) | 1987-07-21 | 1987-07-21 | Method of manufacturing curved pipe with inner metal lining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0925582A true JPH0925582A (en) | 1997-01-28 |
Family
ID=16756295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22077096A Pending JPH0925582A (en) | 1996-08-05 | 1996-08-05 | Production of pipe lined with metal on inside surface |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0925582A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6326063B1 (en) | 1998-01-29 | 2001-12-04 | Tocalo Co., Ltd. | Method of production of self-fusing alloy spray coating member |
| CN103451647A (en) * | 2013-07-22 | 2013-12-18 | 南通大学 | Preparation method for centrifugal self-propagating ceramic/alloy double-compound wear-resistant tube |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58117875A (en) * | 1982-01-06 | 1983-07-13 | Mitsubishi Heavy Ind Ltd | Treatment for inside surface of blank material for cylinder |
| JPS627876A (en) * | 1985-07-02 | 1987-01-14 | Kubota Ltd | Manufacture of two-layer pipe |
-
1996
- 1996-08-05 JP JP22077096A patent/JPH0925582A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58117875A (en) * | 1982-01-06 | 1983-07-13 | Mitsubishi Heavy Ind Ltd | Treatment for inside surface of blank material for cylinder |
| JPS627876A (en) * | 1985-07-02 | 1987-01-14 | Kubota Ltd | Manufacture of two-layer pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6326063B1 (en) | 1998-01-29 | 2001-12-04 | Tocalo Co., Ltd. | Method of production of self-fusing alloy spray coating member |
| CN103451647A (en) * | 2013-07-22 | 2013-12-18 | 南通大学 | Preparation method for centrifugal self-propagating ceramic/alloy double-compound wear-resistant tube |
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