JPH044906A - Tube rolling process - Google Patents
Tube rolling processInfo
- Publication number
- JPH044906A JPH044906A JP10684990A JP10684990A JPH044906A JP H044906 A JPH044906 A JP H044906A JP 10684990 A JP10684990 A JP 10684990A JP 10684990 A JP10684990 A JP 10684990A JP H044906 A JPH044906 A JP H044906A
- Authority
- JP
- Japan
- Prior art keywords
- plug
- lubricant
- life
- rolled
- rolling
- 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
- 238000000034 method Methods 0.000 title claims description 9
- 238000009785 tube rolling Methods 0.000 title claims 2
- 239000000314 lubricant Substances 0.000 claims abstract description 15
- 238000005096 rolling process Methods 0.000 claims abstract description 15
- 229910000851 Alloy steel Inorganic materials 0.000 claims abstract description 12
- 150000003839 salts Chemical class 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 12
- 229910019142 PO4 Inorganic materials 0.000 claims description 4
- 235000021317 phosphate Nutrition 0.000 claims description 4
- 150000003013 phosphoric acid derivatives Chemical class 0.000 claims description 3
- 241000316887 Saissetia oleae Species 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims 1
- 239000000956 alloy Substances 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 230000001050 lubricating effect Effects 0.000 abstract description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 abstract description 2
- 125000002467 phosphate group Chemical class [H]OP(=O)(O[H])O[*] 0.000 abstract 2
- 239000000155 melt Substances 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 description 1
- 229910001626 barium chloride Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
- B21B25/04—Cooling or lubricating mandrels during operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0239—Lubricating
- B21B45/0245—Lubricating devices
- B21B45/0248—Lubricating devices using liquid lubricants, e.g. for sections, for tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0239—Lubricating
- B21B45/0245—Lubricating devices
- B21B45/0263—Lubricating devices using solid lubricants
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、熱間圧延であるンームレス鋼管製造プロセス
のエロンゲータ圧延における合金調圧延性に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to alloy-adjusted rollability in elongator rolling, which is a hot rolling process for producing seamless steel pipes.
（従来の技術）
シームレス鋼管の製造プロセスにおいて、穿孔工程に続
く延伸工程としてエロンゲータミルかある。このミルで
は、穿孔材を１対の樽型ロールと内部に設置したプラグ
で圧延を行う。このエロンゲータてはプラグとしては、
３９ｃｉ Ｃｒ １９ｏＮ ｉ系で代表されるように
Ｃｒ／Ｎｉ比が１〜３の低合金鋼に熱処理により黒皮ス
ケール付けを施したものか使用される。上記プラグで１
３Ｃｒ鋼をはじめとする合金鋼を圧延する場合、プラグ
寿命か極端に低下する問題を白゛している。低寿命の原
因は合金鋼の場合、摩擦係数か高くプラグの初期スケー
ルを早期に消耗すること、また普通鋼ではスケールが多
いため圧延中にスケールの移着かあるのに対して合金鋼
ではスケールか少なくその作用が期待できないことが影
響しているものと考えられる。このため耐熱性かＩ縁な
われ、えぐれと一般に呼ばれるプラグの損耗や変形そし
て圧延材の焼付きが発生し寿命となる。(Prior Art) In the manufacturing process of seamless steel pipes, there is an elongation mill as a drawing process that follows the drilling process. In this mill, perforated material is rolled using a pair of barrel-shaped rolls and a plug installed inside. This Elongator is a plug,
A low-alloy steel with a Cr/Ni ratio of 1 to 3, such as the 39ci Cr 19oNi series, which has been heat-treated to have a black scale is used. 1 with the above plug
When rolling alloy steel such as 3Cr steel, there is a problem that the life of the plug is extremely reduced. The reason for the short life is that alloy steel has a high friction coefficient and the initial scale of the plug is worn out early, and ordinary steel has a lot of scale, so scale transfer occurs during rolling, whereas alloy steel has a large amount of scale. This is thought to be due to the fact that the effect is not as expected. As a result, the heat resistance is compromised, wear and deformation of the plug, commonly called gouging, and seizing of the rolled material occur, resulting in the end of its life.
プラグの温度上昇を防ぐため特開昭８１−２１９４０４
号公報に開示されているようにプラグ先端より冷却水を
出す方式もあるが、その方法では若干の寿命向上はでき
るものの十分な改善には至らない。In order to prevent the temperature rise of the plug, JP-A-81-219404
As disclosed in the above publication, there is a method of discharging cooling water from the tip of the plug, but although this method can improve the life a little, it does not lead to a sufficient improvement.
（発明が解決しようとする課題）
本発明は、上述したような従来の問題点を改良するもの
であって合金鋼管の圧延にお１プるプラグ寿命を改善す
る圧延法を提供することを目的とする。(Problems to be Solved by the Invention) The present invention is intended to improve the conventional problems as described above, and aims to provide a rolling method that improves the life of plugs in rolling alloy steel pipes. shall be.
（課題を解決するための手段）
上記目的を達成するために本発明の要旨とするところは
、熱処理により表層に黒皮スケールを形成せしめた延伸
圧延用プラグによって合金管を圧延するに際し、ｆ−め
圧延材（合金鋼管）内面に金属塩若しくは燐酸塩または
これらを含む潤滑剤を存在させておくことを特徴とする
管圧延法にある。(Means for Solving the Problems) In order to achieve the above object, the gist of the present invention is to provide f- The present invention is a pipe rolling method characterized by the presence of a metal salt, a phosphate, or a lubricant containing these on the inner surface of a rolled material (alloy steel pipe).
以下に、本発明の詳細な説明する。The present invention will be explained in detail below.
本発明者等は、合金鋼圧延におけるプラグ寿命を改善す
る方法を種々検討した結果、圧延材に適切な潤滑剤を添
加することによりプラグ寿命を向上できることを見いた
した。スケール処理を行なったプラグで合金鋼を圧延す
ると合金鋼自身の高い摩擦係数により、圧延材の前進効
率か５〜１０％低下する。このため圧延時間か延びるた
めプラグの温度が上昇し、より一層損耗しやすくなる。The inventors of the present invention have investigated various methods for improving the plug life in rolling alloy steel, and have found that the plug life can be improved by adding an appropriate lubricant to the rolled material. When alloy steel is rolled with a scale-treated plug, the forward efficiency of the rolled material decreases by 5 to 10% due to the high friction coefficient of the alloy steel itself. As a result, the rolling time is extended, and the temperature of the plug increases, making it more likely to wear out.
これに対し圧延材内面に潤滑剤を添加して圧延すると潤
滑剤の潤滑効果により前進動１ｆ−１か向上し圧延時間
を短縮すると同時に潤滑剤か断熱膜となり、プラグの温
度上昇を抑え、また圧延材のプラグへの直接接触を防く
ため、高い寿命向上か可能となる。この場合、潤滑剤と
しては、ガラス系は利用できない。これは、ガラスとプ
ラグ表層スケールとが化合溶融し、スケールがなくなる
ためである。On the other hand, when a lubricant is added to the inner surface of the rolled material and rolled, the lubricant's lubricating effect improves the forward movement 1f-1, shortens the rolling time, and at the same time acts as a lubricant or heat insulating film, suppressing the temperature rise of the plug, and Since the rolled material is prevented from coming into direct contact with the plug, a long service life can be achieved. In this case, glass-based lubricants cannot be used. This is because the glass and plug surface scale are combined and melted, and the scale disappears.
本発明者等はさらに検討した結果、潤滑剤としては、１
０００℃以下で溶融し、一種の流体潤滑的作用をする塩
化物あるいは燐酸塩か適していることを見いたした。塩
化物としては、ＮａＣＩＪ。As a result of further investigation, the present inventors found that 1
It has been found that chlorides or phosphates, which melt at temperatures below 000°C and have a kind of fluid lubricating effect, are suitable. As the chloride, NaCIJ.
ＭｇＣ１２、ＢａＣｌ ２などが、燐酸塩としてはＫＰ
Ｏ３、Ｎａ２ＰＯ３などかあげられる。添加量としては
、５ｃｃ〜１０（ｌｅｅ／ｒｒｆかよい。５ｃｃ以下で
は十分に潤滑効果を発揮できず、１００ｃｃ以上では圧
延中潤滑剤かプラグに押し出され、メインロールに付着
するためスリップが生し、安定圧延が得られないためで
ある。MgC12, BaCl2, etc. are KP as phosphates.
Examples include O3, Na2PO3, etc. The amount to be added is 5 cc to 10 (lee/rrf). If it is less than 5 cc, it will not be able to exhibit a sufficient lubricating effect, and if it is more than 100 cc, it will be pushed out by the lubricant or plug during rolling and will adhere to the main roll, causing slipping. This is because stable rolling cannot be obtained.
（実 施 例）
本発明の実施例として、モデルエロンケータミルで下記
のような条件下、各種潤滑剤を試験した結果を示す。(Example) As an example of the present invention, the results of testing various lubricants on a model Elon Kate mill under the following conditions are shown below.
試験条件
（１）圧延素材：サイズ 外径７５＋ａｍφ、肉厚１４
ｍｍ５長さ５００ ｍｍ
鋼種Ｓ Ｕ Ｓ ３１６
（２）成品寸法：サイズ 外径７５ａｎφ、肉厚５龍延
伸約２．５
（３）圧延温度：１０００℃
（４）プラグ：外径６０龍φ
材質３％Ｃ「−１％Ｎｉ系
表層スケール処理材
第１表に各種潤滑剤にて、Ｓ Ｕ Ｓ ３１６を圧延し
た時の圧延材の前進効率、プラグ耐久性を比較した。耐
久性は潤滑のない場合を１とした寿命比で示している。Test conditions (1) Rolled material: Size outer diameter 75+amφ, wall thickness 14
mm5 length 500 mm Steel type SUS 316 (2) Finished product dimensions: Size outer diameter 75anφ, wall thickness 5mm elongation approx. 2.5 (3) Rolling temperature: 1000℃ (4) Plug: outer diameter 60mm diameter material 3 %C -1%Ni-based surface scale treated material Table 1 compares the advancement efficiency and plug durability of rolled material when SUS 316 is rolled with various lubricants.The durability is compared with that without lubrication. It is shown as a life ratio with the case as 1.
第 １ 表
第１表に示すように、本発明によると現用プラグの前進
効率を向上するとともに、耐久性を大幅に改善可能でき
た。Table 1 As shown in Table 1, according to the present invention, it was possible to improve the advancing efficiency of the currently used plug and to significantly improve the durability.
（発明の効果）
本発明は、以上述べたようにシームレス合金鋼管を圧延
する際に、プラグ寿命を大幅に向上可能となることから
、プラグ寿命向上による原弔位の低減、プラグ交換の減
少による作業率の向上か可能となるなどその効果は大き
い。(Effects of the Invention) As described above, the present invention can significantly improve the life of the plug when rolling seamless alloy steel pipes. The effects are significant, such as the ability to improve work efficiency.
出願人 新１−１本製鐵株式会社 複代理人 弁珪士 田村弘明Applicant: Shin 1-1 Steel Corporation Multi-Agent Hiroaki Tamura, Advice Attorney
Claims (1)
圧延用プラグによって合金管を圧延するに際し、予め圧
延材（合金鋼管）内面に金属塩若しくは燐酸塩またはこ
れらを含む潤滑剤を存在させておくことを特徴とする管
圧延法。When rolling an alloy tube using a drawing plug that has a black scale formed on its surface through heat treatment, it is recommended that metal salts, phosphates, or a lubricant containing these be present on the inner surface of the rolled material (alloy steel tube) in advance. Characteristic tube rolling method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10684990A JPH044906A (en) | 1990-04-23 | 1990-04-23 | Tube rolling process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10684990A JPH044906A (en) | 1990-04-23 | 1990-04-23 | Tube rolling process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH044906A true JPH044906A (en) | 1992-01-09 |
Family
ID=14444081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10684990A Pending JPH044906A (en) | 1990-04-23 | 1990-04-23 | Tube rolling process |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH044906A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007160338A (en) * | 2005-12-13 | 2007-06-28 | Sumitomo Metal Ind Ltd | Hot working tool, and method for manufacturing seamless steel pipe |
| WO2012111307A1 (en) * | 2011-02-15 | 2012-08-23 | 住友金属工業株式会社 | Method for correcting pipe end of seamless pipe formed from high-cr stainless steel |
-
1990
- 1990-04-23 JP JP10684990A patent/JPH044906A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007160338A (en) * | 2005-12-13 | 2007-06-28 | Sumitomo Metal Ind Ltd | Hot working tool, and method for manufacturing seamless steel pipe |
| JP4736773B2 (en) * | 2005-12-13 | 2011-07-27 | 住友金属工業株式会社 | Seamless steel pipe manufacturing method |
| WO2012111307A1 (en) * | 2011-02-15 | 2012-08-23 | 住友金属工業株式会社 | Method for correcting pipe end of seamless pipe formed from high-cr stainless steel |
| JP5035489B1 (en) * | 2011-02-15 | 2012-09-26 | 住友金属工業株式会社 | Pipe end straightening method for seamless pipe made of high Cr stainless steel |
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