JPS6369963A - Composite surface hardening method - Google Patents

Composite surface hardening method

Info

Publication number
JPS6369963A
JPS6369963A JP21064786A JP21064786A JPS6369963A JP S6369963 A JPS6369963 A JP S6369963A JP 21064786 A JP21064786 A JP 21064786A JP 21064786 A JP21064786 A JP 21064786A JP S6369963 A JPS6369963 A JP S6369963A
Authority
JP
Japan
Prior art keywords
hardened
steel
hardness
parts
tool 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
Application number
JP21064786A
Other languages
Japanese (ja)
Inventor
Tomitaka Nishimura
西村 富隆
Fumihiko Takeda
文彦 竹田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OKAYA NETSUSHIYORI KOGYO KK
Original Assignee
OKAYA NETSUSHIYORI KOGYO KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by OKAYA NETSUSHIYORI KOGYO KK filed Critical OKAYA NETSUSHIYORI KOGYO KK
Priority to JP21064786A priority Critical patent/JPS6369963A/en
Publication of JPS6369963A publication Critical patent/JPS6369963A/en
Pending legal-status Critical Current

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  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Physical Vapour Deposition (AREA)

Abstract

PURPOSE:To obtain a surface layer provided with wear resistance and strength, by forming a base material, nitride layer and ion plating layer which are increased stepwise in hardness toward surface to parts to be hardened made of a steel hardened by a heat treatment. CONSTITUTION:The parts to be hardened such as cutting tools, dies, jigs and wear resistant parts made of the above-mentioned steel such as high-speed toll steel, hot and cold working tool steel or steel for machine structural purpose are treated as follows: If the parts to be hardened are applied to; for example, the cold working tool steel, said tool steel is hardened by heating to and holding at 1,210 deg.C, then to oil quenching and is then subjected to tempering at 580 deg.C to 800Hv hardness; thereafter, the tool steel is subjected to 530 deg.CX5hr ion nitriding. TiN is coated to about 2mum thickness by an ion plating method on the resultant nitride layer to form the surface layer, the hardness of which is increased stepwise toward the surface. As a result, the generation of cracks and exfoliation in the high-hardness surface layer part is prevented and the composite surface hardened parts which can extend the service life to a greater extent are obtd.

Description

【発明の詳細な説明】 [発明の目的] (産業上の利用分野) 本発明は、熱処理により硬化した鋼製の切削工具、金型
、治工具、耐摩耗部品などの被硬化部品に対し、まず窒
化処理を行ない、さらにこのつ什帆理に上【1形醪され
た窒化層のトに、イオンプレーティング法によりTiN
、Tic。
[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides a method for hardening parts such as cutting tools, molds, jigs, and wear-resistant parts made of steel hardened by heat treatment. First, nitriding is performed, and then TiN is applied to the nitrided layer by ion plating.
, Tic.

T1CN、その他の超硬質金属化合物を被着して、表面
に向かって硬さを段階的に上昇させ、耐摩耗性と強度を
付与せしめるのに利用される複合表面硬化法に関するも
のである。
The present invention relates to a composite surface hardening method used to deposit T1CN and other ultra-hard metal compounds to gradually increase hardness toward the surface and impart wear resistance and strength.

(従来の技術およびその問題点) 従来より、上記に例示した製品(被硬化部品)に対する
表面硬化法としては、比較的低温で処理することのでき
る窒化法が多く適用されているが、この硬化層の硬さは
最表面で最高Hv1400程度である。しかし、この程
度の硬さでは#摩耗性が十分とはいえず、さらに硬さの
上昇が望まれる場合が多い。
(Prior art and its problems) Conventionally, the nitriding method, which can be treated at a relatively low temperature, has been widely used as a surface hardening method for the products (parts to be hardened) exemplified above. The maximum hardness of the layer is about Hv1400 at the outermost surface. However, this level of hardness does not provide sufficient abrasion resistance, and a further increase in hardness is often desired.

このため、最近では被硬化部品の表面に化学蒸着法(C
VD法)あるいは物理基若法(PVD法)などにより超
硬質の金属化合物を被覆して耐摩性の向上をはかる方法
が行われるようになった。しかし、この場合には母材と
被覆膜との硬度差があまりにも大きすぎるので、高応力
負荷の状態で使用される際には被覆膜の剥離が発生する
ことがめる。
For this reason, chemical vapor deposition (C-
In order to improve the abrasion resistance, methods such as VD (VD) or Physical Vapor Deposition (PVD) have been used to coat the material with an ultra-hard metal compound. However, in this case, the difference in hardness between the base material and the coating film is so large that peeling of the coating film may occur when used under high stress loads.

ちなみに、熱処理によって硬化した高速度工具鋼母材の
硬さは最高でHv940程度であるが。
By the way, the maximum hardness of the high speed tool steel base material hardened by heat treatment is about Hv940.

CVD法あるいはPVD法によって超硬質化合物を被覆
した膜の硬さは、TiCではHv3500程度、TiN
ではHv2500程度、v4C3ではHv3000程度
であるので、母材と被覆膜との硬さの差が非常に大きい
ことがわかる。
The hardness of a film coated with an ultra-hard compound by the CVD or PVD method is about Hv3500 for TiC, and about Hv3500 for TiN.
It can be seen that the difference in hardness between the base material and the coating film is very large since the hardness is about 2500 Hv for V4C3 and about 3000 Hv for V4C3.

(発明の目的) そこで、本発明は上述した従来の問題点に着目し、最表
面の硬さが大で耐摩耗性に著しく優れていると共に、表
層部分の剥離が生じがたいようにすることを目的として
、鋭意研究した結果なされたもので、例えば高速度工具
鋼よりなる工具の場合に、焼入れ焼もどし処理によって
Hv800程度の硬さにし、次いで焼もどし温度以下の
温度においてこれにイオン窒化を施して表面硬さをHv
1400程度にする0次に、この窒化層の上にイオンプ
レーティング法によってTiCを被覆することにより、
その最表面は約Hv3500の硬さに達する。このよう
に、複合硬化処理することにより硬さ変化は段階的とな
り、硬さの急激な不連続性がかなり緩和されるようにな
って、これにより、高応力負荷での使用の場合に、母材
表層部が窒化硬化層の存在によって強化されて耐力が上
昇して塑性変形が小さくなるために、最表層の超硬質化
合物層の割れおよび剥離が軽減されるようになることを
見い出した。
(Purpose of the Invention) Therefore, the present invention focuses on the above-mentioned conventional problems, and provides a structure in which the outermost surface has high hardness and extremely excellent wear resistance, and the surface layer is difficult to peel off. This objective was achieved after intensive research. For example, in the case of a tool made of high-speed tool steel, it is hardened to about Hv800 by quenching and tempering, and then subjected to ion nitriding at a temperature below the tempering temperature. The surface hardness is Hv.
Next, by coating TiC on this nitride layer by an ion plating method,
Its outermost surface reaches a hardness of approximately Hv3500. In this way, the composite hardening process makes the hardness change gradual and the abrupt discontinuity in hardness is considerably reduced, which makes it possible to It has been found that the surface layer of the material is strengthened by the presence of the nitrided hardened layer, increasing its yield strength and reducing plastic deformation, which reduces cracking and peeling of the outermost ultra-hard compound layer.

[発明の構成] (問題点を解決するための手段) 本発明による複合表面硬化法は、熱処理により硬化した
高速度工具鋼、冷間および熱間工具鋼。
[Structure of the Invention] (Means for Solving the Problems) The composite surface hardening method according to the present invention applies to high speed tool steel, cold work tool steel, and hot work tool steel hardened by heat treatment.

機械構造用鋼などの鋼製の切削工具、金型、治工具、耐
摩耗部品などの被硬化部品に対し。
For hardened parts such as cutting tools, molds, jigs, and wear-resistant parts made of steel such as machine structural steel.

第1段階として窒化処理を施し、さらに第2段階として
その上にイオンプレーティング法により超硬物質を被覆
し、表層部において母材、窒化層。
In the first step, nitriding is performed, and in the second step, a superhard material is coated on top of the nitriding process using an ion plating method, and the surface layer is made up of a base material and a nitrided layer.

イオンプレーティング層と表面に向かって硬さを段階的
に増大する表面層を形成するようにしたことを特徴とし
ている。
It is characterized by forming a surface layer whose hardness gradually increases toward the ion plating layer and the surface.

本発明による複合表面硬化法は、高速度工具鋼、冷間お
よび熱間工具鋼9機械構造用鋼などの鋼製の部品に適用
され、前記部品としては、例えば切削工具、金型、治工
具、耐摩耗部品などを挙げることができるが、特に限定
はされない。
The composite surface hardening method according to the present invention is applied to parts made of steel such as high-speed tool steel, cold work tool steel, 9 machine structural steel, etc., and the parts include, for example, cutting tools, molds, jigs and tools. , wear-resistant parts, etc., but are not particularly limited.

そして、本発明によれば、上記に例示した部品(工具)
などの被硬化部品は、熱処理により硬化させたものが適
用され、第1段階として窒化処理を施し、さらに第2段
階としてその上にイオンプレーティング法により超硬物
質を被覆し、表層部において母材、窒化層、イオンプレ
ーティング層と表面に向かって硬さを段階的増大する表
面層を形成する。この場合第1段階として施される窒化
処理や、第2段階として施されるイオンプレーティング
は、適宜それらの条件を選定して実施するのが望ましい
ことはいうまでもない、そして。
According to the present invention, the parts (tools) exemplified above
Parts to be hardened, such as those hardened by heat treatment, are applied, and the first step is nitriding treatment, and the second step is to coat a superhard material by ion plating, and the surface layer is coated with a superhard material. material, nitride layer, ion plating layer and a surface layer whose hardness gradually increases toward the surface. In this case, it goes without saying that the nitriding treatment carried out as the first step and the ion plating carried out as the second step are preferably carried out by selecting appropriate conditions.

イオンプレーティングにより被覆される超硬物質の種類
においても特に限定はされない。
There are no particular limitations on the type of superhard material coated by ion plating.

例えば、本発明による複合表面硬化法を、高速度工具m
 (S K H51材)  、 冷間工Ajll(SK
DII材)、熱間工具鋼(SKD61材)に適用した場
合の表層部の硬さ分布を第1図に例示する。
For example, the composite surface hardening method according to the present invention can be applied to a high speed tool m
(SK H51 material), cold work Ajll (SK
FIG. 1 illustrates the hardness distribution of the surface layer when applied to hot work tool steel (SKD61 material).

ここで5KH51の場合は、1210℃に加熱保持後抽
冷して焼入れしたのち580℃で焼もどしを行って約H
v800の硬さにしてから530℃X5hrのイオン窒
化を施し、このイオン窒化により形成された窒化層の上
にイオンプレーティング法によりTiNを約2gmの厚
さで被覆して、表面に向かって硬さを段階的に増大する
表面層を形成した場合を示すものである。
In the case of 5KH51, after heating and holding at 1210℃, extraction cooling and quenching, tempering at 580℃ and approximately H
After hardening to v800, ion nitriding was performed at 530°C for 5 hours, and the nitrided layer formed by this ion nitriding was coated with TiN to a thickness of about 2 gm by ion plating, and hardened toward the surface. This figure shows a case in which a surface layer whose thickness increases stepwise is formed.

また、5KDIIの場合は、1030℃に加熱保持後空
冷して焼入れしたのち500℃で焼もどしを行って約H
v670の硬さにしてから450’CX10hrのイオ
ン窒化を行い、このイオン窒化により形成された窒化層
の上にTiCを約3gmの厚さにイオンプレーティング
することによって、母材の表面に向かって硬さを段階的
に増大する表面層を形成した場合を示すものである。
In addition, in the case of 5KDII, after heating and holding at 1030℃, air cooling and quenching, tempering at 500℃ and approximately H
After achieving a hardness of v670, ion nitriding is performed for 450'CX10 hr, and TiC is ion plated to a thickness of about 3 gm on the nitride layer formed by this ion nitriding, so that it is hardened toward the surface of the base material. This shows the case where a surface layer is formed that increases the hardness in stages.

さらに、5KD61の場合は、1030℃に加熱保持後
空冷して焼入れしたのち610℃で焼もどしを行うこと
により約Hv 500の硬さにしてから540℃X5h
rのイオン窒化処理を行い、このイオン窒化処理により
形成された窒化層の上にTiCを約2.5gmの厚さに
イオンプレーティングして、母材の表面に向かって硬さ
を段階的に増大する表面層を形成した場合を示すもので
ある。
Furthermore, in the case of 5KD61, after heating and holding at 1030℃, air cooling and quenching, tempering at 610℃ to a hardness of about Hv 500, and then 540℃ x 5 hours.
ion plating of TiC to a thickness of approximately 2.5 gm is performed on the nitrided layer formed by this ion nitriding treatment, and the hardness is gradually increased toward the surface of the base material. This shows the case where an increasing surface layer is formed.

これらのうち、5KD61の表層部をE PMA装置に
より調査し、これによるSEM像と、この部分における
TiおよびN成分を線分析した結果を第2図に示す。第
2図より明らかなように、母材の表面層にはNが多く存
在していて窒化されていることが確認でき、最表面のイ
オンプレーティング層にはTiが多量に認められる。
Of these, the surface layer portion of 5KD61 was investigated using an EPMA device, and the resulting SEM image and the results of line analysis of Ti and N components in this portion are shown in FIG. As is clear from FIG. 2, it can be confirmed that a large amount of N exists in the surface layer of the base material and is nitrided, and a large amount of Ti is observed in the ion plating layer on the outermost surface.

(実施例) 以下1本発明法をドリル、曲げ金型およびダイカスト金
型用鋳抜きビンに適用した場合の具体的実施例を説明す
る。
(Example) Hereinafter, a specific example will be described in which the method of the present invention is applied to a drill, a bending mold, and a cast bottle for a die-casting mold.

〈実施例1〉 この実施例1では、5KH51製の9mm直径のストレ
ートシャンクドリルに対して、本発明による複合表面硬
化処理を行った場合と、比較のためにTiNイオンプレ
ーティング処理のみを行った場合と、無処理の場合とに
ついて、それぞれHRC33に′A賀したS 0M44
0被験材に対する穿孔試験を実施した。その結果を第1
表に示す。なお、第1表において、孔あけ個数は、ドリ
ルによる孔あけが不能になるまでの個数を示している。
<Example 1> In this Example 1, a straight shank drill made of 5KH51 with a diameter of 9 mm was subjected to the composite surface hardening treatment according to the present invention, and for comparison, only the TiN ion plating treatment was performed. S 0M44 was added to HRC33 for the case and the case of no treatment, respectively.
A perforation test was conducted on the 0 test material. The result is the first
Shown in the table. In Table 1, the number of holes to be drilled indicates the number of holes until it becomes impossible to drill holes with a drill.

第1表 第1表に示すように、本発明による複合表面硬化処理を
行った被覆ドリルを用いた場合には大幅な寿命延反が得
られた。
As shown in Table 1, when the coated drill subjected to the composite surface hardening treatment according to the present invention was used, a significant extension of the life span was obtained.

〈実施例2〉 この実施例2では、5KDII製の曲げ金型に対して1
本発明による複合表面硬化処理を行った場合と、比較の
ためにTiCイオンプレーティング処理のみを行った場
合と、無処理の場合とについて、それぞれ5mm厚さの
軟鋼板を曲げ加工した。そして1曲げ加工したときに、
焼付きが発生して使用に耐えなくなるまでの寿命を製品
加工数で表わした。その結果を第2表に示す、なお、試
験用金型としては、真空炉を用いて1030℃に加熱し
、窒素ガスで冷却して焼入れした後500℃で2回焼も
どしくHRC58,0)を行ってから、450℃X8h
rのイオン窒化を行い、その上にTiCイオンブレーテ
ィグを実施したもの、イオン窒化を行うことなくTic
イオンプレーティングのみを実施したもの、および急処
第2表 第2表に示す結果より明らかなように、本発明法による
曲げ金型の表面硬化は、5該金型の寿命延長に対して非
常に有効であった。
<Example 2> In this Example 2, 1
Mild steel plates with a thickness of 5 mm were bent in a case where the composite surface hardening treatment according to the present invention was performed, a case where only TiC ion plating treatment was performed for comparison, and a case where no treatment was performed. And when one bending process is performed,
The lifespan until seizure occurs and the product becomes unusable is expressed in terms of the number of product processes. The results are shown in Table 2.The test mold was heated to 1030°C using a vacuum furnace, cooled with nitrogen gas, quenched, and then tempered twice at 500°C (HRC58,0). After doing this, heat at 450℃ for 8 hours.
ion nitriding of r, followed by TiC ion blating, and TiC without ion nitriding.
As is clear from the results shown in Table 2 for those subjected to ion plating alone and in Table 2 of Table 2, the surface hardening of the bending mold by the method of the present invention is extremely effective in extending the life of the mold. was effective.

〈実施例3〉 この実施例3ではA文ダイカスト金型用鋳抜きビン(S
KD61製)に本発明法を適用した場合を調べた。その
結果を第3表に示す、この鋳抜きビンは、真空炉で10
30℃に加熱し、窒素ガス冷却して焼入れした後610
℃で焼戻しを行ったもの(HRC49、O)である。そ
して、これに540℃X5hrのイオン窒化を行い、そ
の上にT i Cイオンプレーティングを実施したもの
、イオン窒化を行うことなく:TiCイオンプレーティ
ングのみを実施したもの、および無処理のものを用いた
。そして、これらの鋳抜きビンを金型に組込んで使用し
た際に、溶融Anが鋳抜きビンに焼付いて寿命に達する
までのショツト数を調べた。
<Example 3> In this example 3, a cast-out bottle (S
A case was investigated in which the method of the present invention was applied to a product (manufactured by KD61). The results are shown in Table 3. This cast bottle was heated in a vacuum furnace for 10
After heating to 30℃, cooling with nitrogen gas and quenching, 610
It was tempered at ℃ (HRC49, O). Then, this was subjected to ion nitriding at 540°C for 5 hours, followed by TiC ion plating, without ion nitriding: only TiC ion plating was performed, and without treatment. Using. Then, when these cast-out bottles were assembled into a mold and used, the number of shots taken until the molten An burned into the cast-out bottles and reached the end of their lifespan was investigated.

第3表 第3表に示す結果より明らかなように、本発明法による
複合表面硬化処理を施した鋳抜きビンの寿命はいちじる
しく向上していることが確められた。
As is clear from the results shown in Table 3, it was confirmed that the life of cast bottles subjected to the composite surface hardening treatment according to the method of the present invention was significantly improved.

[発明の効果] 以上説明してきたように、本発明による複合表面硬化法
は、熱処理により硬化した高速度工具鋼、冷間および熱
間工具鋼9機械構造用鋼などの鋼製の切削工具、金型、
治工具、#摩耗部品などの被硬化部品に対し、第1段階
として窒化処理を施し、さらに第2段階としてその上に
イオンプレーティング法により超硬物質を被覆し、表層
部において母材、窒化層、イオンプレーティング層と表
面に向かって硬さを段階的に増大する表面層を形成する
ようにしたものであるから、最表面における硬さがかな
り大であって耐摩耗特性を著しく向上させることが可能
であると共に、高硬度の表面層部分における割れや剥離
の発生を阻止して耐用寿命の大幅な延長を実現すること
が可能であり、例えば、本発明による複合表面硬化法を
適用したドリル、曲げ金型、ダイカスト金型用鋳抜きビ
ンなどの耐用寿命を大幅に延長することができるという
非常に優れた効果がもたらされる。
[Effects of the Invention] As explained above, the composite surface hardening method according to the present invention can be applied to cutting tools made of steel such as high-speed tool steel, cold work and hot work tool steel, 9 machine structural steel, etc. hardened by heat treatment; Mold,
Parts to be hardened, such as jigs and wear parts, are subjected to nitriding treatment in the first step, and then in the second step, a superhard material is coated on them using an ion plating method, and the base material is nitrided in the surface layer. Since the surface layer has a hardness that gradually increases toward the surface with the ion plating layer, the hardness at the outermost surface is considerably high and the wear resistance properties are significantly improved. In addition, it is possible to significantly extend the service life by preventing the occurrence of cracks and peeling in the highly hard surface layer. A very excellent effect is brought about in that the useful life of drills, bending dies, casting bottles for die-casting dies, etc. can be greatly extended.

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

第1図は本発明による複合表面硬化法を高速度工具鋼(
SKH51)、冷間工具鋼(SKDll)、および熱間
工具鋼(SKD61)に適用した場合の表層部の硬さ分
布を示したグラフ、第2図は第1図に対応する表層部の
EPMA装置によるSEM像とTiおよびNの線分析結
果を示す写真(2000倍)である。 特許出願人   岡谷熱処理工業株式会社代理人弁理七
  小  塩   豐 第1図 0  0.2  0.4  0.6 0.8表市力゛ら
のf!離(惣m) (訂正図) 図面の浮台(内容に変更なし) 第2図 b 手続嗜n正書(方式) %式% 1、事件の表示 昭和61年特許願第210647号 2 、 !l?1rllノ名n 複合表面硬化法 3、補正をする渚 事件との関係  特許出願人 氏名(名称)   岡谷熱処理工業株式会社4、代理人 住所(居所)〒104東京都中央区銀座二丁目8番9号
木挽館銀座ビル 電話03(5B?)27131番(代
表)6、?ili正により増加する発明の数7、補正の
対象 明細書の発明の詳細な説明、図面の簡単な説明の欄1図
面の5’l、2図 8、補正の内容 別紙のとおり ・−、=\。 おり補正する。 「材1の表面層1aにはNが多く存在していて窒化され
ていることが確認でき、最表面のイオンプレーティング
層1bにはTiが多量に認められる。」 2、同第13頁第6行〜第7行の「を示す写真(200
0倍)である。」を「を示す2000倍相当の説明図で
ある。」に補正する。 3、図面の第2図を別紙の通り訂正する。 以   上
Figure 1 shows the composite surface hardening method according to the present invention applied to high-speed tool steel (
A graph showing the hardness distribution of the surface layer when applied to SKH51), cold work tool steel (SKDll), and hot work tool steel (SKD61). Figure 2 is an EPMA device for the surface layer corresponding to Figure 1. This is a photograph (2000x magnification) showing a SEM image and line analysis results of Ti and N. Patent Applicant: Okaya Heat Treatment Industry Co., Ltd. Representative Patent Attorney 7 Ko Shio Toshio Figure 1 0 0.2 0.4 0.6 0.8 Riki Omoteichi et al.'s f! Separation (Som) (Corrected drawing) Floating platform of the drawing (no change in content) Figure 2b Procedure style n formal text (method) % formula % 1. Indication of the incident Patent Application No. 210647 of 1985 2, ! l? 1rll name n Composite surface hardening method 3, relationship with the Nagisa case to be amended Patent applicant name Okaya Heat Treatment Co., Ltd. 4 Agent address (residence) 2-8-9 Ginza, Chuo-ku, Tokyo 104 Kobikikan Ginza Building Phone: 03 (5B?) 27131 (Main) 6,? Number of inventions increased due to ili correction 7, Detailed explanation of the invention in the specification subject to amendment, Brief explanation of drawings column 1 5'l of drawing, 2 Figure 8, Contents of amendment As shown in the attached sheet -, = \. Correct the error. "It can be confirmed that a large amount of N exists in the surface layer 1a of material 1 and is nitrided, and a large amount of Ti is observed in the outermost ion plating layer 1b." 2, same page 13 Photos showing “in rows 6 to 7 (200
0 times). " is corrected to "This is an explanatory diagram equivalent to 2000 times magnification." 3. Correct Figure 2 of the drawing as shown in the attached sheet. that's all

Claims (1)

【特許請求の範囲】[Claims] (1)熱処理により硬化した高速度工具鋼、冷間および
熱間工具鋼、機械構造用鋼などの鋼製の切削工具、金型
、治工具、耐摩耗部品などの被硬化部品に対し、第1段
階として窒化処理を施し、さらに第2段階としてその上
にイオンプレーティング法により超硬物質を被覆し、表
層部において母材、窒化層、イオンプレーティング層と
表面に向かって硬さを段階的に増大する表面層を形成す
ることを特徴とする複合表面硬化法。
(1) For hardened parts such as cutting tools, molds, jigs, and wear-resistant parts made of steel such as high-speed tool steel, cold work tool steel, cold work tool steel, and machine structural steel that have been hardened by heat treatment, The first step is nitriding, and the second step is to coat the superhard material by ion plating, and the hardness is gradually increased from the base material to the nitrided layer and then the ion plating layer toward the surface. A composite surface hardening method characterized by the formation of a surface layer that increases in intensity.
JP21064786A 1986-09-09 1986-09-09 Composite surface hardening method Pending JPS6369963A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21064786A JPS6369963A (en) 1986-09-09 1986-09-09 Composite surface hardening method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21064786A JPS6369963A (en) 1986-09-09 1986-09-09 Composite surface hardening method

Publications (1)

Publication Number Publication Date
JPS6369963A true JPS6369963A (en) 1988-03-30

Family

ID=16592771

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21064786A Pending JPS6369963A (en) 1986-09-09 1986-09-09 Composite surface hardening method

Country Status (1)

Country Link
JP (1) JPS6369963A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7587919B1 (en) 2008-04-01 2009-09-15 Ford Global Technologies Llc Wear resistant coated sheet metal die and method to manufacture a wear resistant coated sheet metal forming die

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5864377A (en) * 1981-10-12 1983-04-16 Nachi Fujikoshi Corp Surface coated tool and its production
JPS5884968A (en) * 1981-11-12 1983-05-21 Seiko Instr & Electronics Ltd Hard external parts for timepiece
JPS58199858A (en) * 1982-05-18 1983-11-21 Seiko Instr & Electronics Ltd External parts for wristwatch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5864377A (en) * 1981-10-12 1983-04-16 Nachi Fujikoshi Corp Surface coated tool and its production
JPS5884968A (en) * 1981-11-12 1983-05-21 Seiko Instr & Electronics Ltd Hard external parts for timepiece
JPS58199858A (en) * 1982-05-18 1983-11-21 Seiko Instr & Electronics Ltd External parts for wristwatch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7587919B1 (en) 2008-04-01 2009-09-15 Ford Global Technologies Llc Wear resistant coated sheet metal die and method to manufacture a wear resistant coated sheet metal forming die

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