JPH042762A - Wear resistant roll and its production - Google Patents
Wear resistant roll and its productionInfo
- Publication number
- JPH042762A JPH042762A JP2101675A JP10167590A JPH042762A JP H042762 A JPH042762 A JP H042762A JP 2101675 A JP2101675 A JP 2101675A JP 10167590 A JP10167590 A JP 10167590A JP H042762 A JPH042762 A JP H042762A
- Authority
- JP
- Japan
- Prior art keywords
- thermal spraying
- roll
- film
- pressure
- speed steel
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 238000000034 method Methods 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 30
- 238000000576 coating method Methods 0.000 claims abstract description 23
- 239000011248 coating agent Substances 0.000 claims abstract description 22
- 229910000997 High-speed steel Inorganic materials 0.000 claims abstract description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000001301 oxygen Substances 0.000 claims abstract description 12
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000007750 plasma spraying Methods 0.000 claims description 12
- 238000010791 quenching Methods 0.000 claims description 5
- 230000000171 quenching effect Effects 0.000 claims description 5
- 238000005496 tempering Methods 0.000 claims description 5
- 238000007751 thermal spraying Methods 0.000 abstract description 31
- 238000001513 hot isostatic pressing Methods 0.000 abstract 2
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 239000002648 laminated material Substances 0.000 abstract 1
- 239000011148 porous material Substances 0.000 description 11
- 229910045601 alloy Inorganic materials 0.000 description 10
- 239000000956 alloy Substances 0.000 description 10
- 239000002775 capsule Substances 0.000 description 9
- 239000002245 particle Substances 0.000 description 9
- 239000000843 powder Substances 0.000 description 8
- 239000007921 spray Substances 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 238000010998 test method Methods 0.000 description 5
- 238000005507 spraying Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000007725 thermal activation Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Coating By Spraying Or Casting (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、被覆材料として高速度鋼を用いた高厚膜の耐
摩耗性ロール及びその製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wear-resistant roll with a high thickness film using high speed steel as a coating material and a method for manufacturing the same.
Ｆ従来の技術］
丸棒、線材等の製造ラインに使用されるガイドロールは
、表面温度５００℃以上の高温にさらされるため、激し
い繰り返しの熱衝撃を受け、摩耗が激しく、耐用性が短
い。F. Prior Art] Guide rolls used in production lines for round bars, wire rods, etc. are exposed to high temperatures with surface temperatures of 500° C. or higher, and are therefore subjected to severe repeated thermal shocks, resulting in severe wear and short durability.
従来、かかるガイドロールの耐摩耗性を向上させる方法
として、次のようなものがあった。Conventionally, the following methods have been used to improve the wear resistance of such guide rolls.
（１）カプセルＨＩＰ法
これは、第６図に示すようにガイドロール１の周囲をそ
の形状に合わせたカプセル２で囲み、カプセル２とガイ
ドロール１との空間に所要の耐摩耗性粉末合金３を充填
し、脱気及びシールを行ったのち、熱間静水圧処理（以
下、ＨＩＰ処理と呼ぶ）を行って粉末合金３を焼結させ
被覆する方法である。(1) Capsule HIP method As shown in FIG. 6, in this method, a guide roll 1 is surrounded by a capsule 2 that matches the shape of the guide roll 1, and the required wear-resistant powder alloy 3 is placed in the space between the capsule 2 and the guide roll 1. In this method, the powder alloy 3 is filled, degassed and sealed, and then subjected to hot isostatic pressure treatment (hereinafter referred to as HIP treatment) to sinter and coat the powder alloy 3.
しかし、この方法ではあらかじめガイドロール１の形状
に合わせたカプセル２を製作する必要があるため、カプ
セル加工費が高くつくという問題がある。また耐摩耗性
を必要としない部分も被覆されてしまい無駄が生じる。However, in this method, it is necessary to manufacture the capsule 2 in advance to match the shape of the guide roll 1, so there is a problem that the capsule processing cost is high. Furthermore, parts that do not require wear resistance are also coated, resulting in waste.
（２）溶射法
これは、プラズマ溶射法により耐摩耗性合金をガイドロ
ール１の表面に被覆する方法であるが、皮膜層の気孔の
存在は避けられず緻密性が欠如する。また、ガイドロー
ルとの接合力が弱いことも問題である。(2) Thermal Spraying Method This is a method of coating the surface of the guide roll 1 with a wear-resistant alloy by plasma spraying, but the presence of pores in the coating layer is unavoidable, resulting in a lack of density. Another problem is that the bonding force with the guide roll is weak.
（３）溶射後ＨＩＦ処理する方法
上記（２）で溶射後にＨＩＰ処理をすれば皮膜の品質を
改善することが可能である。(3) Method of performing HIF treatment after thermal spraying If HIP treatment is performed after thermal spraying in the above (2), it is possible to improve the quality of the coating.
しかし、従来の溶射法では上記問題のために皮膜を厚く
することができず、一般に０．５〜１．５鰭の厚さで、
これ以上の厚膜化は困難であった。However, with the conventional thermal spraying method, it is not possible to thicken the coating due to the above problems, and the coating is generally 0.5 to 1.5 fin thick.
It was difficult to make the film thicker than this.
（４）特公昭５８−３９２２８号の方法これは、Ｆｅ基
基材材Ｗ、Ｍｏ 、Ｃｏ 、Ｎｌ基合金、ｗｃ、ｖｃを
含む自溶性合金等の耐熱耐摩耗性合金の粉末を溶射し、
その後ＨＩＰ処理を加えた被覆方法で、上記（３）に属
する方法である。(4) The method disclosed in Japanese Patent Publication No. 58-39228, in which powder of a heat-resistant and wear-resistant alloy such as a self-fluxing alloy containing Fe-based base material W, Mo, Co, Nl-based alloy, WC, and VC is thermally sprayed;
This is a coating method that includes subsequent HIP treatment, and is a method that belongs to (3) above.
しかし、この方法でも厚膜化は対象となっておらず、ま
た溶射材料に高速度鋼を含んでいない。さらに溶射法と
してガス溶射法、プラズマ溶射法を示しているが、この
プラズマ溶射法は常圧下で行うものと解され、低圧プラ
ズマ溶射法の適用を示唆する記述は認められない。However, even with this method, thickening of the film is not targeted, and high-speed steel is not included in the thermal spray material. Furthermore, gas spraying and plasma spraying are shown as thermal spraying methods, but this plasma spraying method is understood to be performed under normal pressure, and there is no description suggesting the application of low-pressure plasma spraying.
［発明が解決しようとする課題］
上述の従来法に共通の問題は、皮膜層を大にできないこ
とである。仮にそれが可能であるとしても（例えば上記
（１）のカプセルＨＩＰ法）、緻密性・接合力の欠如等
が問題となって実質的に不可能である。[Problems to be Solved by the Invention] A problem common to the above-mentioned conventional methods is that the film layer cannot be made large. Even if this were possible (for example, the capsule HIP method described in (1) above), it would be practically impossible due to problems such as lack of compactness and bonding strength.
溶射法において厚膜化が不可能な理由としては、溶射粒
子の急冷により発生する内部応力（これは、冷却時の熱
収縮と相変態による体積変化に起因するものである）が
膜厚とともに増加し、剥離、割れを招く力として作用す
ること、皮膜内部の気孔、酸化物が割れへの抵抗を弱め
ること、皮膜と基材間の密着力の不足が剥離への抵抗を
弱めることなどがあげられる。The reason why it is impossible to thicken the film using thermal spraying is that the internal stress generated by the rapid cooling of the sprayed particles (this is due to volume change due to thermal contraction and phase transformation during cooling) increases with the film thickness. However, the pores and oxides inside the film weaken the resistance to cracking, and the lack of adhesion between the film and the base material weakens the resistance to peeling. It will be done.
一方、高厚膜化が可能になれば、摩耗の程度に応じてガ
イドロールの皮膜層を研削することにより何回でも再使
用可能となるので、耐用性、コスト面でのメリットは大
きい。On the other hand, if it becomes possible to make the film thicker, the guide roll can be reused many times by grinding the film layer according to the degree of wear, which has great advantages in terms of durability and cost.
そこで、本発明者らは高厚膜を得る目的で、まず被覆材
料の選定にあたり、耐摩耗性及び熱間硬さに優れた高速
度鋼を中心に各種の試験を行い、その結果、特定の製造
プロセスの下では十分目的を達成し得ることを確認した
。Therefore, in order to obtain a high-thickness film, the present inventors first conducted various tests to select a coating material, focusing on high-speed steel with excellent wear resistance and hot hardness. It was confirmed that the manufacturing process was sufficient to achieve the purpose.
したがって、本発明の目的は、上記の知見に基づき、高
厚膜を持つ安価で耐摩耗性に富むロール及びその製造方
法を提供することにある。Therefore, an object of the present invention is to provide an inexpensive roll having a high thickness film and high wear resistance, and a method for manufacturing the same, based on the above findings.
［課題を解決するための手段］
上記の目的を達成する本発明に係る耐摩耗性ロールは、
Ｆｅ基基材材ロールと、その上に被覆された高速度鋼を
主成分とする厚さ３鰭以上の溶射皮膜との組み合わせか
ら成るものである。[Means for Solving the Problems] The wear-resistant roll according to the present invention that achieves the above object has the following features:
It consists of a combination of an Fe-based base material roll and a thermally sprayed coating coated on the roll and having a thickness of three fins or more, the main component of which is high-speed steel.
溶射材料の高速度鋼は、耐摩耗性及び熱間硬さに優れた
ものとして知られているＷ系、Ｍｏ系、Ｖ系のいずれで
もよいが、中でも高Ｖ系のものが適当である。The high-speed steel used as the thermal spraying material may be W-based, Mo-based, or V-based, which are known to have excellent wear resistance and hot hardness, but among them, high-V steel is suitable.
この耐摩耗性ロールを製造するには、まずロールを６０
０℃以上に予熱し、次いでこの予熱温度下にあるロール
の表面に低圧プラズマ溶射法を適用して上記の高速度鋼
を主成分とする溶射材料を溶射し皮膜を形成する。To manufacture this wear-resistant roll, first the roll is
The roll is preheated to 0° C. or higher, and then a low-pressure plasma spraying method is applied to the surface of the roll under this preheating temperature to spray the above-mentioned thermal spray material mainly composed of high-speed steel to form a coating.
この場合のプラズマ溶射は、酸素分圧が２ Ｔｏｒｒ以
下で、全圧が２０〜３００ Ｔｏｒｒの減圧雰囲気の条
件下で行うものとする。また、溶射は局部溶射でよく、
ロールの耐摩耗性を必要とする個所にのみ限定して行え
ばよい。The plasma spraying in this case is performed under a reduced pressure atmosphere with an oxygen partial pressure of 2 Torr or less and a total pressure of 20 to 300 Torr. In addition, thermal spraying can be localized thermal spraying,
It is sufficient to limit the coating to only those parts of the roll that require wear resistance.
その後、皮膜層の緻密化のためＨＩＰ処理と焼入れ焼戻
しの熱処理を行う。Thereafter, HIP treatment and heat treatment of quenching and tempering are performed to densify the film layer.
［作 用］
被覆材料に高速度鋼を選定することにより、高速度鋼の
持つ耐摩耗性及び熱間硬さの特長を十分に発揮させるこ
とできる。また皮膜の密着力も高い。[Function] By selecting high-speed steel as the coating material, the features of high-speed steel, such as wear resistance and hot hardness, can be fully exhibited. The adhesion of the film is also high.
次に、溶射前にロールを６００℃以上に予熱しておくこ
とにより、溶射粒子の急冷を防止できるため溶射粒子間
の熱歪に基づく内部応力が低減し、また溶射期間中溶射
粒子の熱活性化が保たれるため内部応力が緩和する。そ
の結果、厚膜としても皮膜の剥離、割れ等を生じにくい
のである。Next, by preheating the roll to 600°C or higher before thermal spraying, it is possible to prevent the thermal spray particles from rapidly cooling, which reduces the internal stress caused by thermal strain between the thermal spray particles, and also reduces the thermal activation of the thermal spray particles during the thermal spraying process. The internal stress is alleviated because the internal stress is maintained. As a result, even if the film is thick, peeling or cracking of the film is less likely to occur.
次に、上記の予熱温度条件下で、ロール表面に、ＪＩＳ
Ｇ ４４０３相当の高速度鋼粉末を酸素分圧２ Ｔｏ
ｒｒ以下、全圧２０〜３００ Ｔｏｒｒの減圧雰囲気下
でプラズマ溶射し皮膜を形成する。Next, under the above preheating temperature conditions, JIS
High-speed steel powder equivalent to G 4403 was heated to an oxygen partial pressure of 2 To
A film is formed by plasma spraying under a reduced pressure atmosphere with a total pressure of 20 to 300 Torr.
まず、酸素分圧を低く限定することで、予熱中のロール
及び溶射粒子の酸化が防止される。そのため、皮膜の割
れの原因となる酸化物が減少する。First, by limiting the oxygen partial pressure to a low level, oxidation of the roll and spray particles during preheating is prevented. Therefore, oxides that cause cracks in the film are reduced.
次に、雰囲気全圧を上記の低圧条件とすることで、溶射
粒子の加熱溶融を促進し、粒子飛行速度を増大させるた
め、皮膜中の気孔が減り、緻密性が向上し、この結果耐
摩耗性が向上する。また気孔中のガス圧が低いため、後
工程のＨＩＰ処理にも都合がよい。なお、全圧の下限値
は実用的経済性の見地から定めている。Next, by setting the total atmospheric pressure to the above-mentioned low pressure condition, the heating and melting of the sprayed particles is promoted and the particle flight speed is increased, so the pores in the film are reduced and the density is improved, resulting in wear resistance. Improves sex. Furthermore, since the gas pressure in the pores is low, it is convenient for the HIP treatment in the post-process. Note that the lower limit value of the total pressure is determined from the viewpoint of practical economy.
そして最後に、皮膜中にわずかに残る気孔を消失させ完
全に緻密化するために、ＨＩＰ処理を行い、さらに焼入
れ焼戻しを行って所要の硬さを得る。Finally, in order to eliminate the few remaining pores in the film and completely densify it, HIP treatment is performed, and further quenching and tempering is performed to obtain the required hardness.
［実施例］
本発明において、基材予熱温度、酸素分圧、及び雰囲気
全圧の影響を調べるために、次のような試験を行った。[Example] In the present invention, the following tests were conducted in order to investigate the effects of substrate preheating temperature, oxygen partial pressure, and total atmosphere pressure.
試験は三段階に分けて実施した。The test was conducted in three stages.
試験１：最初に、気孔の無い緻密な皮膜を形成し、その
上で酸化物巻き込みの観点から、抗折力の低下しない溶
射雰囲気中の酸素分圧の上限を調べた。Test 1: First, a dense film without pores was formed, and then, from the viewpoint of oxide inclusion, the upper limit of the oxygen partial pressure in the spraying atmosphere without reducing the transverse rupture strength was investigated.
試験２：次に、気孔の存在が耐摩耗性を低下させるため
、溶射に引き続＜ＨＩＰ処理によって、完全に気孔の無
くなる溶射雰囲気の全圧の上限を調べた。Test 2: Next, since the presence of pores reduces wear resistance, the upper limit of the total pressure of the thermal spraying atmosphere that completely eliminates pores was investigated by HIP treatment following thermal spraying.
試験３：最後に、上記二条性を満たした上で、３ｍｍ以
上の膜厚が形成できる基材の予熱温度を調べた。Test 3: Finally, the preheating temperature of the base material at which a film thickness of 3 mm or more could be formed while satisfying the above-mentioned double-stripe property was investigated.
試験条件及び結果
共通条件
被覆材料 ５ＫＨＬＯ相当組成の合金粉末粒径
１００μｍ以下
溶射機 低圧プラズマ溶射機プラズマガス
溶射電流
基材材質
基材寸法
Ａｒ−２０％Ｈ２
００Ａ
４５Ｃ
直径８０關、高さ１００ｍｍの円柱
体（第４図参照、図中、１は
基材、４は皮膜である）
試験１
基材予熱温度
雰囲気全圧
被覆厚
溶射後ＨＩＰ条件
被覆後熱処理
８００ ℃
１００ Ｔｏｒｒ
５ 關
１１００℃Ｘ １５００ｋｇ ／ ｃシＸＩＨｒ焼入れ
１２３０℃Ｘ １．５ ｗｉｎ
加熱後油冷
焼戻し ５５０℃Ｘ３Ｈｒ
加熱後空冷
試験方法と結果
皮膜４より、直径５ ｍｍの丸棒状試験片を採取し、３
点曲げ試験機にて抗折力を求めた。Test conditions and results Common conditions Covering material Alloy powder with a composition equivalent to 5K HLO Thermal spraying machine Plasma gas spraying Current Base material Base material Dimensions Ar-20%H2 00A 45C Cylindrical diameter 80mm, height 100mm Body (see Figure 4, in the figure, 1 is the base material and 4 is the coating) Test 1 Base material preheating temperature Atmosphere Full pressure Coating thickness Post-spraying HIP conditions Post-coating heat treatment 800°C 100 Torr 5 Speed 1100°C x 1500kg / c-XIHr Quenching 1230℃X 1.5win Heating then oil cooling tempering 550℃X3Hr Heating and then air cooling Test method and results From film 4, a round rod-shaped test piece with a diameter of 5 mm was taken.
Transverse rupture strength was determined using a point bending tester.
その結果を第１図に示す。The results are shown in FIG.
これより、皮膜品質の点からは、酸素分圧を２Ｔｏｒｒ
以下にしなければならないことが明らかとなった。From this, from the point of view of film quality, the oxygen partial pressure should be set at 2 Torr.
It became clear that the following had to be done.
試験２
基材予熱温度 ８００℃
酸素分圧 ２ Ｔｏｒｒ
被覆厚 ３ ｍｍ
溶射後ＨＩＰ条件 １１００℃ｘ １５００ｋｇ ／
ｄ Ｘ Ｉ Ｈｒ試験方法と結果
皮膜４より試験片を採取し、光学顕微鏡観察により、気
孔の体積率を求めた。Test 2 Base material preheating temperature 800°C Oxygen partial pressure 2 Torr Coating thickness 3 mm HIP conditions after thermal spraying 1100°C x 1500kg /
d X I Hr Test Method and Results A test piece was taken from Film 4, and the volume fraction of pores was determined by observation with an optical microscope.
その結果を第２図に示す。The results are shown in FIG.
これより、ＨＩＰ後において、完全に気孔の無い緻密な
膜を得るには溶射時の雰囲気の全圧を３００Ｔｏｒｒ以
下にしなければならないことが明らかとなった。From this, it has become clear that in order to obtain a dense film completely free of pores after HIP, the total pressure of the atmosphere during thermal spraying must be 300 Torr or less.
試験３
雰囲気全圧 １００ Ｔｏｒｒ
酸素分圧 ２ Ｔｏｒｒ
試験方法と結果
溶射後室温まで試験体を冷却したときの、皮膜の剥離を
生じない最大の膜厚を求めた。Test 3 Atmospheric total pressure: 100 Torr Oxygen partial pressure: 2 Torr Test method and results When the test specimen was cooled to room temperature after thermal spraying, the maximum film thickness without peeling of the film was determined.
その結果を第３図に示す。The results are shown in FIG.
これより、試験１，２で求めた、良好な品質を有する皮
膜形成条件下において、３ ｍ＋ｉ以上の厚い皮膜を得
るには６００℃以上の基材予熱温度の必要なことが明ら
かとなった。From this, it became clear that under the conditions for forming a film with good quality as determined in Tests 1 and 2, a substrate preheating temperature of 600° C. or higher is necessary to obtain a thick film of 3 m+i or more.
実施例 以上の試験結果を基に、普通鋼材（直径８０＋ａ＋ｓ。Example Based on the above test results, ordinary steel material (diameter 80+a+s.
高さ１００ｍｍの円柱体）の外表面に本発明法と、従来
のカプセルＨＩＰ法及び溶射法の３種類によって被覆を
実施し、その後表面から試験片を採取し、その試験片の
耐摩耗性を比較した。The outer surface of a cylindrical body with a height of 100 mm was coated using the method of the present invention, the conventional capsule HIP method, and the thermal spraying method. After that, a test piece was taken from the surface and the wear resistance of the test piece was evaluated. compared.
耐摩耗性はアムスラー式摩耗試験機により評価した。こ
の試験法は、第５図に示すように８４５Ｃ製の直径４０
ｍ＋ｓ、厚さ３１１Ｉ！Ｉの回転円盤５の外周面に、水
冷しながら試験片６を５０ｋｇの力で押し当てて、摩擦
距離５００ｍ摺動させた後、試験片６の摩耗幅を測定す
ることにより実施した。Abrasion resistance was evaluated using an Amsler abrasion tester. This test method uses a 40 mm diameter tube made of 845C as shown in Figure 5.
m+s, thickness 311I! The test piece 6 was pressed against the outer circumferential surface of the rotating disk 5 of I with a force of 50 kg while being cooled with water, and after sliding the test piece 6 over a friction distance of 500 m, the wear width of the test piece 6 was measured.
結果は第１表のとおりである。The results are shown in Table 1.
■本発明法における条件
被覆材料 ５ＫＨＩＯ相当組成粉末粒径１００
μｍ以下
溶射条件
溶射法 低圧プラズマ溶射法
プラズマガス Ａｒ−２０％Ｈ２
電流 ６００Ａ
雰囲気圧力 ３００ Ｔｏｒｒ
酸素分圧 ２ Ｔｏｒｒ
予熱 ６００℃
溶射後ＨＩＰ条件 １１００℃Ｘ １５００ｋｇ ／
ｃｄ Ｘ Ｉ Ｈｒ被覆後熱処理 焼入れ１２３０
℃Ｘ １．５ ｗｉｎ加熱後油冷
焼戻し ５５０℃Ｘ３Ｈｒ
加熱後空冷
■従来のカプセルＨＩＰ法における条件被覆材料
５ＫＨＩＯ相当組成粉末粒径１００μｍ以下
脱気真空度 １Ｏ−５Ｔｏｒｒ
溶射後ＨＩＰ条件 １１００℃ｘ ２０００ｋｇ ／
ｃｊ ｘ ３ Ｈｒ■従来の溶射法における条件
被覆材料 ３０％ＶＣ添加
Ｎｉ−８ｔ−Ｂ系自溶合金
溶射法 常圧プラズマ溶射法プラズマガス
Ａｒ−２０％Ｈ２
電流 ６００Ａ
予熱 なし
被覆後熱処理 １１５０℃ｘｌＨｒ第１表から、本
発明品（条件■）は、従来のカプセルＨＩＰ法を適用し
た場合（条件■）よりも耐摩耗性が数段優れており、ま
た、従来の代表的な耐摩耗被覆材料とされるＷＣを３０
％添加したＮｉ基自溶合金の溶射法（条件■）と比べる
と、はるかに大きな耐摩耗性を発揮している。しかも高
厚膜が得られている。■Conditions for the method of the present invention Covering material 5KHIO equivalent composition powder particle size 100
Below μm thermal spraying conditions Thermal spraying method Low pressure plasma spraying method Plasma gas Ar-20%H2 Current 600A Atmospheric pressure 300 Torr Oxygen partial pressure 2 Torr Preheating 600℃ HIP conditions after thermal spraying 1100℃X 1500kg /
cd X I Hr Post-coating heat treatment Quenching 1230
℃X 1.5 win heating followed by oil cooling tempering 550℃
5KHIO equivalent composition Powder particle size 100μm or less Degassing vacuum degree 1O-5Torr HIP conditions after thermal spraying 1100℃ x 2000kg /
cj x 3 Hr ■ Conditions for conventional thermal spraying Coating material 30% VC added Ni-8t-B self-fluxing alloy thermal spraying Normal pressure plasma spraying Plasma gas
Ar-20%H2 Current 600A Preheating None Post-coating heat treatment 1150℃xlHr From Table 1, the product of the present invention (condition ■) has several levels of wear resistance compared to the case where the conventional capsule HIP method is applied (condition ■). 30% of WC, which is considered to be a typical conventional wear-resistant coating material.
Compared to the thermal spraying method using a Ni-based self-fluxing alloy (condition (2)), it exhibits far greater wear resistance. Moreover, a highly thick film was obtained.
本発明法は、もちろん局部溶射も可能であり、耐摩耗性
を必要とする個所にのみ溶射できる。Of course, the method of the present invention also allows for localized thermal spraying, and can be applied only to areas where wear resistance is required.
また、本発明は前述のごときガイドロールに限定される
ものではなく、圧延ロール等にも適用できるものである
。Further, the present invention is not limited to the above-mentioned guide rolls, but can also be applied to rolling rolls and the like.
［発明の効果］
以上のように本発明によれば、耐摩耗性、耐用性に優れ
た安価なロールの提供が可能となる。[Effects of the Invention] As described above, according to the present invention, it is possible to provide an inexpensive roll with excellent wear resistance and durability.
また、皮膜の高厚膜化、高緻密化が可能である。Furthermore, it is possible to make the film thicker and more dense.
【図面の簡単な説明】
第１図は本発明において低圧プラズマ溶射法の適用に際
し、酸素分圧の影響を抗折力の面から調べた線図、第２
図は同じく雰囲気全圧の影響を気孔体積率の面から調べ
た線図、第３図は同じく基材予熱温度の影響を最大膜厚
の面から調べた線図、第４図は本発明の実施例に供した
試験体の斜視図、第５図は摩耗試験方法の説明図、第６
図は従来のカプセルＨＩＰ法の説明図である。
・・・基材
４・・・皮膜[Brief explanation of the drawings] Figure 1 is a diagram examining the influence of oxygen partial pressure from the perspective of transverse rupture strength when applying the low-pressure plasma spraying method in the present invention;
Figure 3 is a diagram similarly examining the influence of the total atmospheric pressure from the perspective of pore volume fraction, Figure 3 is a diagram similarly examining the influence of substrate preheating temperature from the aspect of maximum film thickness, and Figure 4 is a diagram examining the influence of the present invention. A perspective view of the test specimen used in the example, FIG. 5 is an explanatory diagram of the abrasion test method, and FIG.
The figure is an explanatory diagram of the conventional capsule HIP method. ... Base material 4 ... Film
Claims (3)
た高速度鋼を主成分とする厚さ３ｍｍ以上の溶射皮膜と
を有する耐摩耗性ロール。(1) A wear-resistant roll comprising a roll made of an Fe-based material and a thermal sprayed coating with a thickness of 3 mm or more, the main component of which is high-speed steel, applied to the surface of the roll.
加熱し、前記ロールの表面に高速度鋼を主成分とする材
料を酸素分圧が２Ｔｏｒｒ以下、全圧が２０〜３００Ｔ
ｏｒｒの減圧雰囲気下でプラズマ溶射して皮膜を形成し
、その後熱間静水圧処理、次いで焼入れ焼戻しの熱処理
を行うことを特徴とする耐摩耗性ロールの製造方法。(2) A roll made of Fe-based material is heated to 600°C or higher in advance, and a material mainly composed of high-speed steel is coated on the surface of the roll with an oxygen partial pressure of 2 Torr or less and a total pressure of 20 to 300 T.
A method for manufacturing a wear-resistant roll, which comprises forming a coating by plasma spraying in a reduced pressure atmosphere of 100 mL, followed by hot isostatic pressure treatment, and then heat treatment of quenching and tempering.
摩耗性を必要とする個所に限定して形成されることを特
徴とする請求項２記載の耐摩耗性ロールの製造方法。(3) The method for manufacturing a wear-resistant roll according to claim 2, wherein the coating formed by plasma spraying is formed only at a portion of the roll that requires wear resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2101675A JPH042762A (en) | 1990-04-19 | 1990-04-19 | Wear resistant roll and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2101675A JPH042762A (en) | 1990-04-19 | 1990-04-19 | Wear resistant roll and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH042762A true JPH042762A (en) | 1992-01-07 |
Family
ID=14306935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2101675A Pending JPH042762A (en) | 1990-04-19 | 1990-04-19 | Wear resistant roll and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH042762A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0288756A (en) * | 1988-09-22 | 1990-03-28 | Kubota Ltd | Formation of wear-resistant film |
| JPH02101674A (en) * | 1988-10-06 | 1990-04-13 | Canon Inc | Information recording and reproducing device |
-
1990
- 1990-04-19 JP JP2101675A patent/JPH042762A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0288756A (en) * | 1988-09-22 | 1990-03-28 | Kubota Ltd | Formation of wear-resistant film |
| JPH02101674A (en) * | 1988-10-06 | 1990-04-13 | Canon Inc | Information recording and reproducing device |
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