JPH0266135A - Cermet for hot guide roll - Google Patents
Cermet for hot guide rollInfo
- Publication number
- JPH0266135A JPH0266135A JP21925488A JP21925488A JPH0266135A JP H0266135 A JPH0266135 A JP H0266135A JP 21925488 A JP21925488 A JP 21925488A JP 21925488 A JP21925488 A JP 21925488A JP H0266135 A JPH0266135 A JP H0266135A
- Authority
- JP
- Japan
- Prior art keywords
- cermet
- tic
- hot guide
- hot
- tin
- 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
- 239000011195 cermet Substances 0.000 title claims abstract description 38
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 abstract description 12
- 229910000831 Steel Inorganic materials 0.000 abstract description 10
- 239000010959 steel Substances 0.000 abstract description 10
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 229910003178 Mo2C Inorganic materials 0.000 abstract description 2
- 229910003470 tongbaite Inorganic materials 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 11
- 206010010904 Convulsion Diseases 0.000 description 6
- 238000005098 hot rolling Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
- 238000007792 addition Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 238000004227 thermal cracking Methods 0.000 description 3
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 239000011362 coarse particle Substances 0.000 description 2
- -1 ferrous metals Chemical class 0.000 description 2
- MHIGBKBJSQVXNH-IWVLMIASSA-N methacycline Chemical compound C=C([C@H]1[C@@H]2O)C3=CC=CC(O)=C3C(=O)C1=C(O)[C@@]1(O)[C@@H]2[C@H](N(C)C)C(O)=C(C(N)=O)C1=O MHIGBKBJSQVXNH-IWVLMIASSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011295 pitch Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 101000981091 Enterobacteria phage T4 Protein cef Proteins 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/008—Rollers for roller conveyors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、熱間ガイドローラ用サーメットに関し、特に
は、熱間圧延装置、連続加熱装置等に使用されて好適な
熱間ガイドローラ用サーメットに関するものである。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a cermet for hot guide rollers, and in particular to a cermet for hot guide rollers suitable for use in hot rolling equipment, continuous heating equipment, etc. It is related to.
従来、上記熱間ガイドローラ用の材料としては−ａ的に
鋳鋼や工具鋼等が用いられていたが、これらは耐摩耗性
が低く、耐用寿命が比較的に短いことから、近年では耐
摩耗性に優れる一Ｃ系超硬合金が用いられことが多くな
っている。Conventionally, cast steel, tool steel, etc. have been used as materials for the hot guide rollers, but these have low wear resistance and relatively short service life, so in recent years, wear-resistant materials have been used. 1C type cemented carbide, which has excellent properties, is increasingly being used.
一方、最近、軽量で耐摩耗性に優れ、しかも、鋼等の鉄
系合金材料との親和性が低く、被搬送鋼材との焼付が防
げるというセラミックスやサーメットの特性が注目され
、これら材料からなる熱間圧延ロールやガイドローラ等
が提案されている。On the other hand, recently, the characteristics of ceramics and cermets, which are lightweight, have excellent wear resistance, have low affinity with iron-based alloy materials such as steel, and can prevent seizure with the transported steel materials, have attracted attention, and Hot rolling rolls, guide rollers, etc. have been proposed.
しかしながら、これら材料は優れた特性を多く有する反
面、靭性に劣り、かつ熱伝導率が低いことから、初期欠
損や表面熱亀裂等の問題があり、近来、それらの改善に
ついて多方面より研究・開発が進められ、また種々の提
案がなされている。However, while these materials have many excellent properties, they are inferior in toughness and have low thermal conductivity, resulting in problems such as initial chipping and surface thermal cracking. progress has been made, and various proposals have been made.
これら提案のうち、熱間ガイドローラ用のサーメットと
しては、例えば、特公昭５７−５８４２６号公報にて開
示されているように、その高温強度と耐熱衝撃性を改善
したものがある。Among these proposals, as a cermet for hot guide rollers, there is a cermet with improved high temperature strength and thermal shock resistance, as disclosed in Japanese Patent Publication No. 58426/1983, for example.
このナーメントは、 ＷＣ，ＭｏｚＣＴａＣ，ＮｂＣＶ
Ｃのうちの一種以上；５〜３０％、Ｃｒ１Ｃｚ ； ０
．５〜１０％、ＴｉＣおよびＴｉＮ ；残部からなる硬
質相を６５〜９０％、Ｆｅ、 Ｎｉ＋ Ｃｏ等の鉄属金
属の一種以上からなる結合相および不可避不純物を１０
〜３５％、重■％で含み、かつ、ＴｉＣの含有量をＴｉ
ＣとＴｉＮとの合量に対し５５〜９０％とし、ＴｉＣと
ＴｉＨの平均粒度を１〜８μに規制したものである。This nutrients include WC, MozCTaC, NbCV
One or more of C; 5 to 30%, Cr1Cz; 0
．． 5-10%, TiC and TiN; 65-90% hard phase consisting of the remainder, 10% binder phase consisting of one or more types of ferrous metals such as Fe, Ni + Co, and unavoidable impurities.
~35%, weight%, and the TiC content is Ti
The total amount of C and TiN is 55 to 90%, and the average particle size of TiC and TiH is regulated to 1 to 8 microns.
この従来のサーメットは、主成分であるＴｉＣの一部を
ＴｉＮおよびＣｒ５Ｃｚと、ＷＣ＋ ＭＯｔＣ＋ Ｔａ
Ｃ，ＮｂＣおよびＶＣのうちの一種以上で１換すること
により、その高温強度と耐熱衝撃性を改善して、軽量な
る熱間ガイドローラの製造を可能としている。This conventional cermet consists of a part of the main component TiC with TiN and Cr5Cz, and WC+MOtC+Ta
By replacing it with one or more of C, NbC, and VC, its high temperature strength and thermal shock resistance are improved, making it possible to manufacture a lightweight hot guide roller.
しかし、上記従来の一部系超硬合金からなる熱間ガイド
ローラにおいては、結合相金属として−ｍ的に用いられ
るＣｏにＮｉを加えたり、またはＧｏをＮｉと置換した
りして、その耐酸化性を高める対策を講じても条件によ
っては、これら熱間ガイドローラと被搬送鋼材とが反応
して焼付きが起こり、該ガイドローラの摩耗量が大きく
なるばかりでなく、被搬送鋼材の品質も損なわれるとい
う問題が生じていた。However, in the above-mentioned conventional hot guide rollers made of some type of cemented carbide, Ni is added to Co, which is used as a binder phase metal, or Go is replaced with Ni, and the acid resistance is improved. Even if measures are taken to improve the corrosion resistance, depending on the conditions, these hot guide rollers and the steel material to be transported may react and seize, which not only increases the amount of wear on the guide rollers but also reduces the quality of the steel material to be transported. A problem arose in that it was also damaged.
また、このような問題は、高品質を求められる５ＵＳ３
０４ステンレス鋼等の極低炭素系の鋼線材の熱間圧延に
おいて顕著に発生する。In addition, such problems can be solved in 5US3, which requires high quality.
This occurs significantly during hot rolling of ultra-low carbon steel wire rods such as 04 stainless steel.
さらに、これら焼付きは、ＷＣ系超硬合金の比重が大き
くガイドローラが重くなるため、作動中のびびりや振動
で支持するベアリングに過負荷がかかり、これを損傷す
ることによっても生じる。Furthermore, these seizures also occur because the specific gravity of the WC-based cemented carbide makes the guide roller heavy, so chatter and vibration during operation overload the supporting bearings and damage them.
一方、前記従来のサーメット（特公昭５７−５８４２６
号）は、既存のサーメットに比較して、その高温強度と
耐熱衝撃性が改善され、また、−〇系超硬合金に比較し
て、焼付が防止でき、かつ軽量化が計れるものの、この
サーメットからなる熱間ガイドローラは、熱間圧延等で
最大の問題とされる表面熱亀裂の進展が激しく、匈Ｃ系
超硬合金からなるものとの対比において、その耐用寿命
に劣るものとなるという問題点がある。On the other hand, the conventional cermet (Japanese Patent Publication No. 57-58426
Although this cermet has improved high-temperature strength and thermal shock resistance compared to existing cermets, and can prevent seizure and be lighter than -0 series cemented carbide, this cermet It is said that hot guide rollers made of steel are subject to severe surface thermal cracking, which is the biggest problem in hot rolling, etc., and that their service life is inferior to those made of C-based cemented carbide. There is a problem.
本発明は、上記問題点に鑑みなされたもので、軽量で耐
摩耗性に優れ、かつ被搬送鋼材との焼付が防止でき、し
かも、その表面熱亀裂の進展を抑制し得て、その耐用寿
命の向上を図ることができる熱間ガイドローラ用サーメ
ットの提供を目的とするものである。The present invention has been developed in view of the above-mentioned problems, and is lightweight and has excellent wear resistance, and can prevent seizure with the transported steel material, and can also suppress the development of thermal cracks on the surface of the steel material, and can extend its service life. The object of the present invention is to provide a cermet for hot guide rollers that can improve the performance.
上記目的を達成するために本発明は以下の構成としてい
る。すなわち、第１請求項の発明に係る熱間ガイドロー
ラ用サーメットは、ＴｉＣを５〜６０％、−Ｃを５〜５
０％、Ｍｏ１Ｃ，ＴａＣ＋ νＣ，Ｃ１Ｃｚ、 ＮｂＣ
ＺｒＣ，ｔｌｆｃのうちの一種ないしは二種以上を１〜
２５％、ＮｉとＣｏとを合量で５〜４０％含み、かつ、
前記Ｔｉｃの平均粒径が１．５〜１５μ、前記札の平均
粒径が３〜１５μとしたものである。In order to achieve the above object, the present invention has the following configuration. That is, the cermet for hot guide rollers according to the invention of claim 1 contains 5 to 60% TiC and 5 to 5% -C.
0%, Mo1C, TaC+ νC, C1Cz, NbC
One to two or more of ZrC and tlfc
25%, containing 5 to 40% of Ni and Co in total, and
The Tic has an average particle size of 1.5 to 15 μm, and the tag has an average particle size of 3 to 15 μm.
また、第２請求項の発明に係る熱間ガイドローラ用サー
メットは、ＴｉＣを５〜６０％、ＷＣを５〜５０％、Ｍ
ｏｚＣ＋ ＴａＣ，ＶＣ，Ｃｒ５Ｃｚ＋ ＮｂＣ，Ｚｒ
Ｃ，１ｌｆｃのうちの一種ないしは二種以上を１〜２５
％、ＮＩとＣｏとを合■で５〜４０％、ＴｉＮを、Ｔｉ
Ｃ含有量との合■に対し５％以上、総量に対し３０％以
下（以上重曹％）含み、かつ、前記ＴｉＣおよびＴｉＮ
の平均粒径が１．５〜１５μ、前記札の平均粒径が３〜
１５μとしたものである。Further, the cermet for hot guide rollers according to the invention of claim 2 contains 5 to 60% TiC, 5 to 50% WC, M
ozC+ TaC, VC, Cr5Cz+ NbC, Zr
1 to 25 of one or more of C, 1lfc
%, NI and Co combined 5-40%, TiN, Ti
Contains 5% or more with respect to C content and 30% or less with respect to the total amount (more than % baking soda), and the TiC and TiN
The average particle size of the tag is 1.5 to 15μ, and the average particle size of the tag is 3 to 15μ.
The thickness was set to 15μ.
本発明者等は、既存のサーメットおよび前記従来のサー
メットについて種々の検討を加える一方、その表面熱亀
裂の進展を抑制すべく鋭意研究を行った結果、サーメッ
トの表面熱亀裂の進展慶合いは、該サーメットのＴｉＣ
とＴｉＮの粒径のみならず一部の粒径によっても左右さ
れ、これら硬質相の粒径が比較的に粗粒であるとき表面
熱亀裂が進展し難くなることを知見した。The present inventors conducted various studies on existing cermets and the conventional cermets, and conducted intensive research to suppress the development of surface thermal cracks in the cermets. TiC of the cermet
It has been found that surface thermal cracks are difficult to propagate when the grain size of these hard phases is relatively coarse.
そして更に検討を重ねた結果、各組成分を下記の項に示
す範囲に調整して耐摩耗性、抗折力、靭性等の特性を確
保する一方、上記硬質相の粒径を下記０項に示す範囲内
とするとき、特には比較的に粗粒とされた罰の分量を多
くするとき、所期の特性を有し、しかも、その表面熱亀
裂が進展し難いサーメットが得られるとの結論を得た。As a result of further investigation, we adjusted each composition to the range shown in the following section to ensure properties such as wear resistance, transverse rupture strength, and toughness, while at the same time adjusting the particle size of the hard phase to the following section 0. It is concluded that when the cermet is kept within the range shown, especially when the amount of relatively coarse particles is increased, a cermet having the desired properties and in which surface thermal cracks are difficult to propagate can be obtained. I got it.
そこで、第１請求項の発明においては、■、ノ０゜
ＴｉＣの含有量； ５％未満では耐摩耗性が極端に劣る
ものとなり、サーメットとしての特長を失する、−・方
、６０％を超えると靭性が低下し、熱間ガイドローラ用
として使用できなくなるので、５〜６０％の範囲内とす
る。Therefore, in the invention of claim 1, if the content of TiC is less than 5%, the wear resistance will be extremely poor and the characteristics as a cermet will be lost; If it exceeds this, the toughness will decrease and it will no longer be possible to use it as a hot guide roller, so it should be within the range of 5 to 60%.
ＷＣの含有量；その添加により熱伝導率と靭性が向上す
るが、５％未満ではその効果が得られず一方、５０％を
超えるとサーメットとしての特性が失われ、耐摩耗性等
に影響を及ぼすので、５〜５０％の範囲内とする。WC content: The addition of WC improves thermal conductivity and toughness, but if it is less than 5%, this effect cannot be obtained, while if it exceeds 50%, the properties as a cermet are lost and wear resistance etc. are affected. Therefore, it should be within the range of 5 to 50%.
ＭｏｔＣ＋ＴａＣ＋ＶＣ，ＣｒｚＣｚ＋ＮｂＣ，ＺｒＣ
，ＨｆＣの含を量；これら成分の一種ないしは二種以上
の添加により耐熱衝撃性が向上するが、１％未満ではそ
の効果が得られず、一方、２５％を超えると著しく抗折
力が低下するので、１〜２５％の範囲内とする。MotC+TaC+VC, CrzCz+NbC, ZrC
, HfC content: Adding one or more of these components improves thermal shock resistance, but if it is less than 1%, this effect cannot be obtained, while if it exceeds 25%, the transverse rupture strength decreases significantly. Therefore, it should be within the range of 1 to 25%.
Ｎｉ、 Ｃｏの含有量；これら成分は結合相金属として
添加されるが、これらの添加■が合量で５％未満ではバ
インダーとしての役割を果たし得す、焼結が困難となり
、しかも靭性が低下する、一方、４０％を超えると硬度
が低下し耐摩耗性が低下するので、５〜４０％の範囲内
とする。Content of Ni and Co: These components are added as binder phase metals, but if the total amount of these additions is less than 5%, they may act as a binder, making sintering difficult and reducing toughness. On the other hand, if it exceeds 40%, the hardness and wear resistance will decrease, so it should be within the range of 5 to 40%.
ｔ′′′−・パ：
ＴｉＣおよびＷＣ等の硬質相の平均粒径を微細粒にする
と得られるサーメットの靭性が向上するが、反面、Ｔｉ
Ｃの平均粒径を１．５μ未満、ＷＣの平均粒径を３μ未
満の微細粒とすると、得られるサーメットは、その表面
熱亀裂の進展の激しいものとなる、一方、これらＴｉＣ
および礼の平均粒径を１５μを超える粗粒にすると、得
られるサーメットは靭性の劣るものとなり、熱間ガイド
ローラ用として使用できなくなるので、ＴｉＣの平均粒
径は１．５〜１５μの範囲内とし、ＷＣの平均粒径は３
〜１５μの範囲内とする。t′′′-・Pa: When the average grain size of the hard phase such as TiC and WC is made finer, the toughness of the obtained cermet is improved, but on the other hand, the toughness of the obtained cermet is improved.
If the average grain size of C is less than 1.5 μm and the average grain size of WC is fine grains of less than 3 μm, the resulting cermet will have severe surface thermal cracking.
If the average particle size of TiC is made into coarse particles exceeding 15μ, the obtained cermet will have poor toughness and cannot be used for hot guide rollers, so the average particle size of TiC should be within the range of 1.5 to 15μ. and the average particle size of WC is 3
It is within the range of ~15μ.
一方、第２請求項の発明においては、上記サーメットの
組成分にＴｉＮを加えることにより、その高温抗折力と
硬度の向上を図るものである。On the other hand, in the second aspect of the invention, by adding TiN to the composition of the cermet, the high temperature transverse rupture strength and hardness of the cermet are improved.
しかし、ＴｉＮの添加量が、ＴｉＣ含を■との合■に対
する割合で５％未満では、これら特性の向上効果が得ら
れず、また、総量に対する割合で３０％を超えると逆に
これら特性が低下するので、その添加は、ＴｉＣ含有量
との合冊に対し５％以上、総量に対し３０％以下とする
。またＴｉＮの粒径はＴｉＣの粒径と等価にて熱亀裂の
進展に関与するので、その平均粒径は、上記ＴｉＣの平
均粒径と同様に、１．５〜１５μの範囲内とする。However, if the amount of TiN added is less than 5% in terms of the ratio of the TiC content to the total amount of Therefore, its addition should be 5% or more based on the combined volume with TiC content and 30% or less based on the total amount. Further, since the particle size of TiN is equivalent to the particle size of TiC and is involved in the development of thermal cracks, the average particle size is set within the range of 1.5 to 15 μm, similar to the above-mentioned average particle size of TiC.
〔実施例］
それぞれの平均粒径が０．８μ、３μ、６ｕ、１５μの
ＴｉＣ粉末、０．８μ、３μ、 １５μのＴｉＮ粉末、
１．５μ、６ｕ、９ｔｔ、 １５μのＷＣ粉末、１．
５μのＭｏ２Ｃ，ＴａＣＣｒ、Ｃ，、ＮｉおよびＣｏ粉
末を原料粉末として準備し、これら原料粉末を、第１表
のＮＣＬＩ乃至Ｎα６に示す組成となるように配合して
、それぞれ通常の粉末冶金法により焼結し、直径４２ｍ
ｍ、長さ１６ｍｍの胴部をもつ熱間ガイドローラを製造
した。[Example] TiC powder with average particle diameters of 0.8μ, 3μ, 6u, and 15μ, TiN powder with average particle diameters of 0.8μ, 3μ, and 15μ, respectively.
1.5μ, 6u, 9tt, 15μ WC powder, 1.
5 μ of Mo2C, TaCCr, C, Ni, and Co powders were prepared as raw material powders, and these raw material powders were blended to have the compositions shown in NCLI to Nα6 in Table 1, and each was processed by a normal powder metallurgy method. Sintered, diameter 42m
A hot guide roller with a body of 16 mm in length and 16 mm in length was manufactured.
また、比較例として、前述の従来のサーメット（特公昭
５７−５８４２６号）である第１表中の阻７に示す組成
のものと、従来の肛系超硬合金であるＮα８およびＮα
９に示す組成のものからなる熱間ガイドローラを、Ｆ記
と同方法にて製造した。In addition, as comparative examples, we compared the conventional cermet (Japanese Patent Publication No. 57-58426) with the composition shown in 7 in Table 1, and the conventional anal cemented carbide Nα8 and Nα
A hot guide roller having the composition shown in Example 9 was manufactured in the same manner as in Section F.
上記の本実施例および比較例の熱間ガイドローラを、被
搬送材としては、焼付き性の面で極めて過酷な負荷をガ
イドローラに与えるステンレス鋼線（ＳＵＳ３０４）の
熱間圧延に用いた。The hot guide rollers of the present example and the comparative example described above were used for hot rolling of stainless steel wire (SUS304), which subjected the guide rollers to an extremely severe load in terms of seizure resistance.
各熱間ガイドローラは、１４．５ｍｍ径から５．５１１
１ｍ径に熱間圧延する工程の最終仕上げの位置に取付け
られ、圧延速度５０ｍ／ｓｅｅで、８０ｔｏｎ圧延した
後に取外された。Each hot guide roller has a diameter of 14.5mm to 5.511mm
It was installed at the final finishing position in the process of hot rolling to a diameter of 1 m, and was removed after rolling 80 tons at a rolling speed of 50 m/see.
これら同一条件にて使用した後の本実施例および比較例
の熱間ガイドローラについて、それぞれの表面摩耗状況
と熱亀裂の進展４に況を調査した。After being used under these same conditions, the hot guide rollers of the present example and comparative example were investigated for their respective surface wear conditions and the development of thermal cracks.
その結果を第１表に示す。The results are shown in Table 1.
（以下空白）
第１表に示すように、本実施例の熱間ガイドローラ（Ｎ
ｃｉ Ｉ−ＮαＧ）は、比較例の熱間ガイドローラと比
較して、いずれも熱亀裂の進展が抑制されており、また
、その耐摩耗性は、従来のサーメッ） （Ｎα７）のも
のと同等ないしはそれ以上であり、従来のぽ系超硬合金
（Ｎα８、阻９）のものより明らかに向上していること
が確認された。(Blank below) As shown in Table 1, the hot guide roller (N
ci I-NαG) has suppressed the growth of thermal cracks compared to the hot guide roller of the comparative example, and its wear resistance is equivalent to that of the conventional cermet) (Nα7). It was confirmed that the hardness was at least higher than that, and clearly improved over that of conventional po-based cemented carbide (Nα8, Nα9).
そして、これらの耐用寿命を評価するに、再研磨がその
最大熱亀裂深さまで行われることより、その摩耗量と最
大熱亀裂長さとの加算値をもって判定すると、第１表に
示すように、本実施例の熱間ガイドローラは、比較例の
ものに比べて約２倍の耐用寿命を有するものであると評
価できる。In order to evaluate their service life, since regrinding is carried out to the maximum thermal crack depth, if we judge by adding the amount of wear and the maximum thermal crack length, as shown in Table 1, It can be evaluated that the hot guide roller of the example has a service life approximately twice as long as that of the comparative example.
さらに、これら熱間ガイドローラの表面熱亀裂の発生状
況を、耐熱亀裂性という観点からの評価を助けるため、
その熱亀裂長さの分布をより詳細にみて第１図のグラフ
に整理した。Furthermore, in order to help evaluate the occurrence of surface thermal cracks on these hot guide rollers from the perspective of thermal crack resistance,
The distribution of thermal crack lengths was examined in more detail and summarized in the graph shown in Figure 1.
第１図のグラフは、本実施例のものの一例と、比較例の
ものとの対比における熱亀裂長さの分布を示すもので、
該グラフの積算割合（％）とは、発生した各熱亀裂の長
さをｌθμピッチに括って積算し、熱亀裂の総数に対す
るｌＯμピッチ毎の積算数の率を算出したものである。The graph in FIG. 1 shows the distribution of thermal crack length in comparison between an example of the present example and a comparative example.
The integrated ratio (%) in the graph is obtained by integrating the length of each thermal crack that occurred in lθμ pitches, and calculating the ratio of the integrated number per lOμ pitch to the total number of thermal cracks.
なお、グラフ中のＯ印は第１表中の本実施例中のＮα２
の例、口印はＮα７の比較例、Δ印はＮα９の比較例の
熱間ガイドローラを破断して調査した結果をそれぞれ示
す。Note that the O mark in the graph indicates Nα2 in this example in Table 1.
In the example, the mark indicates a comparative example of Nα7, and the mark Δ indicates the result of breaking and investigating a hot guide roller of a comparative example of Nα9.
第１図のグラフに示すように、本発明に係るサーメット
からなるＮ［１２の例の熱間ガイドローラは、従来のサ
ーメットからなるＮα７の比較例および従来の一部系超
硬合金からなるＮα９の比較例の熱間ガイドローラに比
べて、その熱亀裂長さの分布幅も狭く、最大熱亀裂長さ
も短い。As shown in the graph of FIG. 1, the hot guide roller of the N[12 example made of the cermet according to the present invention is different from the comparative example Nα7 made of the conventional cermet and the Nα9 made of the conventional partial cemented carbide. Compared to the hot guide roller of the comparative example, the distribution width of the thermal crack length is narrower, and the maximum thermal crack length is also shorter.
一方、それぞれの熱間ガイドローラの表面状況を観察し
たところ、本実施例の熱間ガイドローラは、被搬送ステ
ンレス鋼線との反応が認められず、表面肌も非常に良好
であった。On the other hand, when the surface condition of each hot guide roller was observed, the hot guide roller of this example showed no reaction with the conveyed stainless steel wire and had a very good surface texture.
以上のように、本発明に係るサーメットからなる熱間ガ
イドローラは、従来の札系超硬合金からなる熱間ガイド
ローラに比較して、軽量で軸受けに対する負倚を軽量で
き、かつ鉄系金属との親和性が低く、被顕送鋼材との焼
付きが防止でき、製品品質の向上も図れ、また、従来の
サーメットからなる熱間ガイドローラに比較して、表面
熱亀麗の進展の１印制に一段優れ、その耐用寿命を向上
させることができる。As described above, the hot guide roller made of cermet according to the present invention is lighter than the conventional hot guide roller made of tag-based cemented carbide, has a lighter load on the bearing, and is made of iron-based metal. It has low affinity with the steel material to be exposed, prevents seizure with the steel material to be conveyed, improves product quality, and also reduces the development of surface thermal glare compared to conventional hot guide rollers made of cermet. It has better printing properties and can extend its service life.
以上述べた如く、本発明に係る熱間ガイドローラ用サー
メットは、表面熱亀裂の進展を即問するに一段優れるも
のであり、サーメット本来の優れた特性を失することな
く、その耐用寿命の向上を図り得て、もって、軽量で生
産性を高めることができ、かつ被搬送材である製品品質
の向上も図り得る優れた熱間特性を具備する熱間ガイド
ローラの実現に大きく寄与するものである。As described above, the cermet for hot guide rollers according to the present invention is much better in detecting the development of surface thermal cracks, and the service life of the cermet can be improved without losing the original excellent properties of the cermet. This will greatly contribute to the realization of a hot guide roller that is lightweight, increases productivity, and has excellent hot properties that can improve the quality of the transported material. be.
第１回は本発明に係る熱間ガイドローラの、比較例との
対比における熱亀裂長さの分布を示すグラフである。
特許出願人 株式会社 神戸製鋼所
代 理 人 弁理士 金丸 章−
第１図
熱亀裂長さ（Ｊ、）The first graph is a graph showing the distribution of thermal crack length in the hot guide roller according to the present invention in comparison with a comparative example. Patent applicant: Kobe Steel, Ltd. Representative Patent attorney: Akira Kanemaru - Figure 1 Thermal crack length (J,)
Claims (2)
２Ｃ、ＴａＣ、ＶＣ、Ｃｒ＿３Ｃ＿２、ＮｂＣ、ＺｒＣ
、ＨｆＣのうちの一種ないしは二種以上を１〜２５％、
ＮｉとＣｏとを合量で５〜４０％（以上重量％）含み、
かつ、前記ＴｉＣの平均粒径が１．５〜１５μ、前記Ｗ
Ｃの平均粒径が３〜１５μであることを特徴とする熱間
ガイドローラ用サーメット。(1) TiC 5-60%, WC 5-50%, Mo_
2C, TaC, VC, Cr_3C_2, NbC, ZrC
, 1 to 25% of one or more of HfC,
Contains a total of 5 to 40% (by weight) of Ni and Co,
and the average particle size of the TiC is 1.5 to 15μ, and the W
A cermet for a hot guide roller, characterized in that the average particle size of C is 3 to 15μ.
３Ｃ、ＴａＣ、ＶＣ、Ｃｒ＿３Ｃ＿２、ＮｂＣ、ＺｒＣ
、ＨｆＣのうちの一種ないしは二種以上を１〜２５％、
ＮｉとＣｏとを合量で５〜４０％、ＴｉＮを、ＴｉＣ含
有量との合量に対し５％以上、総量に対し３０％以下（
以上重量％）含み、かつ、前記ＴｉＣおよびＴｉＮの平
均粒径が１．５〜１５μ、前記ＷＣの平均粒径が３〜１
５μであることを特徴とする熱間ガイドローラ用サーメ
ット。(2) TiC 5-60%, WC 5-50%, Mo_
3C, TaC, VC, Cr_3C_2, NbC, ZrC
, 1 to 25% of one or more of HfC,
The total amount of Ni and Co is 5 to 40%, and the TiN is 5% or more with respect to the total amount with TiC content and 30% or less with respect to the total amount (
% by weight), and the average particle size of the TiC and TiN is 1.5 to 15 μm, and the average particle size of the WC is 3 to 1 μm.
A cermet for hot guide rollers characterized by a diameter of 5μ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21925488A JPH0266135A (en) | 1988-08-31 | 1988-08-31 | Cermet for hot guide roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21925488A JPH0266135A (en) | 1988-08-31 | 1988-08-31 | Cermet for hot guide roll |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0266135A true JPH0266135A (en) | 1990-03-06 |
Family
ID=16732639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21925488A Pending JPH0266135A (en) | 1988-08-31 | 1988-08-31 | Cermet for hot guide roll |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0266135A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0767013A1 (en) * | 1995-10-02 | 1997-04-09 | Shinhokoku Steel Corporation | System for guiding works to be rolled |
| JP2010144249A (en) * | 2008-12-16 | 2010-07-01 | Sandvik Intellectual Property Ab | Cermet member and method of manufacturing the same |
| JP2012144804A (en) * | 2010-12-17 | 2012-08-02 | Sandvik Intellectual Property Ab | Cermet body and method of manufacturing the same |
| JP2012193430A (en) * | 2011-03-17 | 2012-10-11 | Dijet Industrial Co Ltd | Cemented carbide |
| CN103215483A (en) * | 2013-05-06 | 2013-07-24 | 界首市亿恒刀具有限责任公司 | High-intensity industrial cutter for steel rolling |
| JP2017524810A (en) * | 2014-06-09 | 2017-08-31 | サンドビック インテレクチュアル プロパティー アクティエボラーグ | Cemented carbide tool |
| CN112746212A (en) * | 2020-12-22 | 2021-05-04 | 浙江恒成硬质合金有限公司 | Roller and manufacturing method thereof |
| KR20230019161A (en) | 2020-10-09 | 2023-02-07 | 니혼텅스텐 가부시키가이샤 | Absence of grinding/agitation/mixing/kneading machine |
-
1988
- 1988-08-31 JP JP21925488A patent/JPH0266135A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0767013A1 (en) * | 1995-10-02 | 1997-04-09 | Shinhokoku Steel Corporation | System for guiding works to be rolled |
| JP2010144249A (en) * | 2008-12-16 | 2010-07-01 | Sandvik Intellectual Property Ab | Cermet member and method of manufacturing the same |
| US9187810B2 (en) | 2008-12-16 | 2015-11-17 | Sandvik Intellectual Property Ab | Cermet body and a method of making a cermet body |
| JP2012144804A (en) * | 2010-12-17 | 2012-08-02 | Sandvik Intellectual Property Ab | Cermet body and method of manufacturing the same |
| JP2012193430A (en) * | 2011-03-17 | 2012-10-11 | Dijet Industrial Co Ltd | Cemented carbide |
| CN103215483A (en) * | 2013-05-06 | 2013-07-24 | 界首市亿恒刀具有限责任公司 | High-intensity industrial cutter for steel rolling |
| JP2017524810A (en) * | 2014-06-09 | 2017-08-31 | サンドビック インテレクチュアル プロパティー アクティエボラーグ | Cemented carbide tool |
| KR20230019161A (en) | 2020-10-09 | 2023-02-07 | 니혼텅스텐 가부시키가이샤 | Absence of grinding/agitation/mixing/kneading machine |
| DE112021005360T5 (en) | 2020-10-09 | 2023-07-20 | Nippon Tungsten Co., Ltd. | PULVERIZING/STIRRING/MIXING/KNEADING MACHINE COMPONENT |
| CN112746212A (en) * | 2020-12-22 | 2021-05-04 | 浙江恒成硬质合金有限公司 | Roller and manufacturing method thereof |
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