JP3463481B2 - Method for producing surface hardened Fe-Al alloy - Google Patents
Method for producing surface hardened Fe-Al alloyInfo
- Publication number
- JP3463481B2 JP3463481B2 JP25266396A JP25266396A JP3463481B2 JP 3463481 B2 JP3463481 B2 JP 3463481B2 JP 25266396 A JP25266396 A JP 25266396A JP 25266396 A JP25266396 A JP 25266396A JP 3463481 B2 JP3463481 B2 JP 3463481B2
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- JP
- Japan
- Prior art keywords
- alloy
- layer
- base material
- hardened
- thickness
- 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.)
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- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高い剛性、靭性、
高い表面硬度、耐摩耗性を必要とする部品、例えば歯車
や軸受等の機構部品や刃物、特に摺動を繰り返す刃物、
工具等に利用できる表面硬化Ｆｅ−Ａｌ系合金の製造方
法に関するものである。TECHNICAL FIELD The present invention relates to high rigidity, toughness,
Parts that require high surface hardness and wear resistance, such as mechanical parts such as gears and bearings and blades, especially blades that repeat sliding,
The present invention relates to a method for producing a surface-hardened Fe-Al-based alloy that can be used for tools and the like.
【０００２】[0002]
【従来の技術】歯車や軸受などの機構部品や刃物、特に
摺動を繰り返すような刃物や工具には工具鋼、高炭素ス
テンレス鋼、析出硬化型ステンレス鋼等が利用されてい
たが、これらの材料は靭性には優れるが、表面硬度はあ
まり高くないため、耐摩耗性が悪く、消耗が激しかっ
た。このため表面硬度が高いセラミックスの利用も考え
られているが、靭性に欠け、また加工も困難であるため
に利用は難しい。そこで上記合金にアルミナなどをＰＶ
ＤやＣＶＤ等によりコーティングした材料も存在する
が、形成される表面硬質層の厚さが０．１μｍオーダー
であり、密着等の問題もあるため耐摩耗性等の表面硬質
層が関係する特性の改善には至っていない。また５００
℃前後に硬化温度域があるＦｅ合金の表面に純Ａｌ層を
形成し、硬化処理温度でＡｌを拡散させて、金属間化合
物を形成して表面層を硬化させる場合、処理温度が低い
ので長時間の処理を施さないと、Ａｌの拡散が不十分で
最表面にＡｌ層が残存し、表面が柔らかくなり、表面硬
度を要する用途には適さなくなる。2. Description of the Related Art Tool steel, high carbon stainless steel, precipitation hardening stainless steel and the like have been used for mechanical parts such as gears and bearings and blades, especially for blades and tools that repeat sliding. The material was excellent in toughness, but the surface hardness was not so high that the wear resistance was poor and the wear was severe. Therefore, it is considered to use ceramics having high surface hardness, but it is difficult to use because of lack of toughness and difficult processing. Therefore, alumina is added to the above alloy as PV.
Although there are materials coated by D, CVD, etc., the thickness of the surface hard layer to be formed is on the order of 0.1 μm, and there are problems such as adhesion. It has not improved. Again 500
When a pure Al layer is formed on the surface of an Fe alloy that has a hardening temperature range around ℃ and the Al is diffused at the hardening treatment temperature to form an intermetallic compound and the surface layer is hardened, the treatment temperature is low, so long If the time treatment is not performed, the diffusion of Al is insufficient, the Al layer remains on the outermost surface, the surface becomes soft, and it is not suitable for applications requiring surface hardness.
【０００３】[0003]
【発明が解決しようとする課題】本発明はこのような事
実に鑑みてなされものであって、剛性、靭性に優れ、且
つ耐摩耗性にも優れると共に密着性の強い表面硬化層を
有する表面硬化Ｆｅ−Ａｌ系合金の製造方法を提供する
ことを課題とする。The present invention has been made in view of the above circumstances, and has a surface-hardened layer having a surface-hardened layer which is excellent in rigidity, toughness, wear resistance and adhesion. It is an object to provide a method for manufacturing an Fe-Al alloy.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するため
に本発明の第１の表面硬化Ｆｅ−Ａｌ系合金の製造方法
は、４５０℃以上５５０℃以下での熱処理により硬化す
るＦｅ合金の基材の表面に０．５〜１５重量％のＦｅを
含有するＡｌ合金の表面層を形成し、この得られた材料
を上記基材の硬化に適した温度、時間で熱処理し、上記
材料中のＦｅとＡｌを拡散させ、基材のＦｅ及び表面層
のＡｌ合金に含有されるＦｅと表面層のＡｌ合金のＡｌ
との間に金属間化合物を形成し、表面に厚さ２〜５０μ
ｍの表面硬化層を形成すると同時に母材の強度も増大さ
せることを特徴とし、また本発明の第２の表面硬化Ｆｅ
−Ａｌ系合金の製造方法は、４５０℃以上５５０℃以下
での熱処理により硬化するＦｅ合金の基材の表面に０．
５〜１０重量％のＦｅを含有するＡｌ合金の表面層を圧
延により積層し、この得られた材料を上記基材の硬化に
適した温度、時間で熱処理し、上記材料中のＦｅとＡｌ
を拡散させ、基材のＦｅ及び表面層のＡｌ合金に含有さ
れるＦｅと表面層のＡｌ合金のＡｌとの間に金属間化合
物を形成し、表面に厚さ２〜５０μｍの表面硬化層を形
成すると同時に母材の強度も増大させることを特徴とす
る。In order to solve the above problems, the first method for producing a surface-hardened Fe-Al alloy according to the present invention is based on an Fe alloy which is hardened by heat treatment at 450 ° C or higher and 550 ° C or lower. A surface layer of an Al alloy containing 0.5 to 15% by weight of Fe is formed on the surface of the material, and the obtained material is heat-treated at a temperature and for a time suitable for curing the above-mentioned base material. Fe and Al are diffused, and Fe contained in the base material and the Al alloy in the surface layer and Al in the Al alloy in the surface layer
Form an intermetallic compound between the and
m of the surface-hardened layer is formed, and at the same time, the strength of the base material is increased.
The method for manufacturing an Al-based alloy is as follows.
A surface layer of an Al alloy containing 5 to 10% by weight of Fe is laminated by rolling, and the obtained material is heat-treated at a temperature and for a time suitable for curing the above-mentioned base material to obtain Fe and Al in the above-mentioned material.
To form an intermetallic compound between Fe of the base material and Fe contained in the Al alloy of the surface layer and Al of the Al alloy of the surface layer to form a surface-hardened layer having a thickness of 2 to 50 μm on the surface. It is characterized in that the strength of the base material is increased at the same time as it is formed.
【０００５】このように製造することにより、適切な温
度での加熱によりＦｅ合金の基材は硬化して剛性の改善
がなされると共に基材と表面層との間で相互にＦｅとＡ
ｌの拡散が速やかに進む。その結果、基材が例えば、析
出硬化型ステンレス鋼の場合、ＦｅとＡｌとがＦｅＡｌ
3 、Ｆｅ2 Ａｌ5 等の金属間化合物を形成し、表面が硬
化する。上記したような金属間化合物により表面層の硬
化がなされ、しかもこの表面硬化層は相互拡散により得
られているので、密着性が非常によく、剥離の可能性が
低い。したがって、このような表面硬化層を有する材料
は十分な表面硬度を有する耐摩耗性等の性質に優れた材
料となる。また上記第２の表面硬化Ｆｅ−Ａｌ系合金の
製造方法は、基材の表面に０．５〜１０重量％のＦｅを
含有するＡｌ合金の表面層を圧延により積層するために
基材にＦｅを含有するＡｌ合金の表面層を圧延に積層す
るものでも確実に積層でき、また圧延で表面層を簡単に
形成できる。By the above-mentioned production, the base material of the Fe alloy is hardened by heating at an appropriate temperature to improve the rigidity, and the base material and the surface layer are mutually provided with Fe and A.
The diffusion of l proceeds rapidly. As a result, when the base material is, for example, precipitation hardening stainless steel, Fe and Al are FeAl.
3 , an intermetallic compound such as Fe 2 Al 5 is formed, and the surface is hardened. Since the surface layer is cured by the intermetallic compound as described above and the surface-cured layer is obtained by mutual diffusion, the adhesion is very good and the possibility of peeling is low. Therefore, a material having such a surface-hardened layer becomes a material having sufficient surface hardness and excellent properties such as abrasion resistance. In the second method for producing a surface-hardened Fe-Al-based alloy, the surface of an Al alloy containing 0.5 to 10% by weight of Fe is laminated on the surface of the base material by rolling so that Fe is applied to the base material. Even if the surface layer of the Al alloy containing Al is laminated by rolling, it can be surely laminated, and the surface layer can be easily formed by rolling.
【０００６】[0006]
【発明の実施の形態】本発明の表面硬化Ｆｅ−Ａｌ系合
金の製造方法は、マルエージング鋼、析出硬化型ステン
レス鋼に代表される、５００℃前後に硬化熱処理の温度
域があるＦｅ合金の基材の表面に０．５〜１５重量％の
Ｆｅを含有するＡｌ合金の表面層を形成し、その基材の
硬化熱処理温度で熱処理することにより、ＦｅとＡｌを
表面近傍で相互拡散させ、Ａｌを完全に拡散させ、金属
間化合物（例えばＦｅＡｌ3 ）の生成を行い、表面硬化
層を形成すると同時に基材の硬度、剛性も上昇させて得
られるものである。５００℃前後に硬化熱処理温度域が
あるＦｅ合金の基材にＦｅを含有するＡｌ合金の表面層
を形成し、硬化熱処理温度で熱処理することにより、表
面硬化層の形成と基材の硬度、剛性上昇が同時になされ
るため、靭性があり、耐摩耗性に優れた材料を製造で
き、その際、表面層を形成するのが０．５〜１５重量％
のＦｅを含有するＡｌ合金であるため、５００℃前後の
熱処理温度でも１時間程度の短時間でＡｌが完全に拡散
して金属間化合物（例えばＦｅＡｌ3）となり、量産性
も向上する。BEST MODE FOR CARRYING OUT THE INVENTION The method for producing a surface-hardened Fe-Al alloy according to the present invention is performed on a Fe alloy represented by a maraging steel and a precipitation hardening stainless steel, which has a temperature range for hardening heat treatment at around 500 ° C. A surface layer of an Al alloy containing 0.5 to 15% by weight of Fe is formed on the surface of the base material, and heat treatment is performed at the curing heat treatment temperature of the base material to cause Fe and Al to interdiffuse near the surface, It is obtained by completely diffusing Al to form an intermetallic compound (for example, FeAl 3 ), forming a surface-hardened layer, and at the same time increasing hardness and rigidity of the base material. By forming a surface layer of an Al alloy containing Fe on a base material of an Fe alloy having a hardening heat treatment temperature range around 500 ° C. and heat treating at a hardening heat treatment temperature, formation of a surface hardening layer and hardness and rigidity of the base material As the temperature rises at the same time, it is possible to manufacture a material having toughness and excellent wear resistance, in which case the surface layer forms 0.5 to 15% by weight.
Since it is an Al alloy containing Fe, Al is completely diffused into an intermetallic compound (for example, FeAl 3 ) in a short time of about 1 hour even at a heat treatment temperature of about 500 ° C., and mass productivity is also improved.
【０００７】本発明の表面硬化Ｆｅ−Ａｌ系合金の最終
形態は図１に示すように表面に金属間化合物による硬化
層を形成させると同時に母材強度も大きくした合金であ
る。図１で符号１は基材（母材）であり、２はＦｅＡｌ
3 等の金属間化合物が形成された表面硬化層である。４
５０〜５５０℃で硬化熱処理を施すＦｅ合金の基材とし
ては靭性、剛性などを備えている任意の合金を使用でき
るが、好適なものを挙げれば、マルエージング鋼、析出
硬化型ステンレス鋼である。但し、この条件に適する合
金であればこの限りでない。上記のような表面硬化Ｆｅ
−Ａｌ合金を製造する本発明の方法は、基本的には溶融
メッキ等により図３に示すようにＦｅ合金の基材１の表
面に（図示した例では両方の面）に表面層として０．５
〜１５重量％のＦｅを含むＡｌ合金層３Ｂを形成し、硬
化に適した条件で加熱処理することにより表面層のＡｌ
合金層及び基材のＦｅ合金の金属を相互に拡散、結合さ
せ、表面に金属間化合物による硬化層を形成させると同
時に母材強度も大きくさせて図１に示す材料を得ること
にある。また図２及び図３に示すようにＦｅ合金の基材
１の表面（図示した例では両方の面）に０．５〜１０重
量％のＦｅを含むＡｌ合金箔３Ａを重ねて圧延によりク
ラッドし、Ｆｅ合金の基材１の表面に０．５〜１０重量
％のＦｅを含むＡｌ合金層３Ｂを形成する場合もある。
上記のように溶融メッキでＡｌ合金層を形成するときＦ
ｅの含有量を０．５〜１５重量％として上限を１５重量
％としたのは、１５重量％を越えると融点が１０００℃
を越えて溶融メッキが困難になるからである。また圧延
によりクラッドしてＡｌ合金層３Ｂを形成するときＦｅ
の含有量を０．５〜１０重量％として上限を１０重量％
としたのは、１０重量％を越えると、合金が硬く、脆く
なり、クラッド圧延に適さないからである。このときＡ
ｌ合金層中のＦｅ濃度及びその厚みを調整することによ
り、基材より硬度の高い層を２〜５０μｍに制御する。
これは、前述の表面硬化層が耐摩耗性等に寄与するには
２μｍ以上あれば十分であり、５０μｍを越えると硬化
層そのものの脆さを生じるようになるからである。The final form of the surface-hardened Fe-Al alloy of the present invention is an alloy in which a hardened layer of an intermetallic compound is formed on the surface and at the same time the strength of the base metal is increased as shown in FIG. In FIG. 1, reference numeral 1 is a base material (base material), and 2 is FeAl.
It is a surface-hardened layer on which an intermetallic compound such as 3 is formed. Four
As the base material of the Fe alloy that is subjected to the hardening heat treatment at 50 to 550 ° C., any alloy having toughness, rigidity and the like can be used, but preferred examples are maraging steel and precipitation hardening type stainless steel. . However, this is not a limitation as long as the alloy is suitable for this condition. Surface hardened Fe as described above
The method of the present invention for producing an -Al alloy is basically the same as the surface layer on the surface of the Fe alloy substrate 1 (both surfaces in the illustrated example) as a surface layer on the surface of the Fe alloy substrate 1 as shown in FIG. 5
Al of the surface layer is formed by forming an Al alloy layer 3B containing 15% by weight of Fe and performing heat treatment under conditions suitable for curing.
It is to obtain the material shown in FIG. 1 by diffusing and bonding the alloy layer and the metal of the Fe alloy of the base material to each other to form a hardened layer of an intermetallic compound on the surface and at the same time increase the strength of the base material. Further, as shown in FIGS. 2 and 3, an Al alloy foil 3A containing 0.5 to 10% by weight of Fe is laid on the surface of the Fe alloy substrate 1 (both surfaces in the illustrated example) and clad by rolling. In some cases, the Al alloy layer 3B containing 0.5 to 10% by weight of Fe is formed on the surface of the Fe alloy base material 1.
When the Al alloy layer is formed by hot dipping as described above, F
The content of e is set to 0.5 to 15% by weight and the upper limit is set to 15% by weight.
This is because hot dip plating becomes difficult. Further, when clad by rolling to form the Al alloy layer 3B, Fe
Content of 0.5-10 wt% and the upper limit is 10 wt%
The reason is that if it exceeds 10% by weight, the alloy becomes hard and brittle, and is not suitable for clad rolling. At this time A
By adjusting the Fe concentration in the 1-alloy layer and its thickness, the layer having a hardness higher than that of the base material is controlled to 2 to 50 μm.
This is because it is sufficient that the surface hardened layer has a thickness of 2 μm or more in order to contribute to abrasion resistance and the like, and if it exceeds 50 μm, the hardened layer itself becomes brittle.
【０００８】熱処理はＦｅ合金の基材の種類により最適
条件が定まり、その条件と目的とする硬化層の厚さによ
り、当初形成するＡｌ合金層の厚さとＦｅ含有率が定ま
る。一例を挙げると、Ａｌ合金の組成と、厚さは基材が
析出硬化型ステンレス鋼の場合、硬化温度である４７０
〜４９０℃で１時間保持し、表面層のＡｌ元素と基材中
のＦｅが相互に拡散、結合して形成される金属間化合物
が最表面まで達するような条件を満たす必要がある。上
記基材においては、目標とする硬化層の厚さが２〜５０
μｍであれば、Ａｌ合金層中のＦｅの濃度は０．５〜１
５重量％で目標達成可能となる。Ｆｅの組成比が０．５
重量％に満たない状態で、Ｆｅを含有するＡｌ合金を残
存させないようにしようとすれば、熱処理温度を上げな
ければならなく、基材強度を損ねるか、熱処理時間が長
くなって生産性を損なうこととなる。そこで、本発明に
おいては０．５〜１５重量％のＦｅを含むＡｌ合金層を
表面に形成し、望ましくは４７０〜４９０℃で１時間保
持するのが上記要求を満たす材料の製造方法となる。Optimum conditions for the heat treatment are determined by the type of the Fe alloy base material, and the thickness of the initially formed Al alloy layer and the Fe content are determined by the conditions and the intended thickness of the hardened layer. As an example, when the base material is precipitation hardening stainless steel, the composition and thickness of the Al alloy are 470, which is the hardening temperature.
It is necessary to keep the temperature at ˜490 ° C. for 1 hour and satisfy the condition that the intermetallic compound formed by the Al element in the surface layer and Fe in the base material diffusing and binding to each other reaches the outermost surface. In the above base material, the target thickness of the cured layer is 2 to 50.
If it is μm, the concentration of Fe in the Al alloy layer is 0.5 to 1
The target can be achieved at 5% by weight. Fe composition ratio is 0.5
If it is attempted not to leave the Al alloy containing Fe in a state of less than wt%, the heat treatment temperature must be raised, and the strength of the base material is impaired, or the heat treatment time becomes longer and productivity is impaired. It will be. Therefore, in the present invention, the method for producing a material satisfying the above requirements is to form an Al alloy layer containing 0.5 to 15% by weight of Fe on the surface, and desirably hold the layer at 470 to 490 ° C for 1 hour.
【０００９】[0009]
【実施例】以下、本発明を実施例によりさらに詳細に説
明する。
［実施例１］析出硬化型ステンレス鋼（Ｆｅ−１６Ｃｒ
−４Ｎｉ−４Ｃｕ−０．３Ｎｂ）の厚さ１０ｍｍの板を
用意した。この板を窒素雰囲気中で１０４０℃に加熱し
て３０分間保持後水冷した。その両面を粗化した後に両
面に厚さ４０μｍのＡｌ−１０Ｆｅ合金箔を重ねてクラ
ッド圧延して、厚さ９ｍｍの積層材とした。この積層材
を所定の形に切断し、大気中で４８０℃の温度で１時間
加熱を行った。これにより図１に示すようにＦｅＡ
ｌ3 、Ｆｅ2 Ａｌ5 等の金属間化合物を形成し、表面よ
り約３５μｍの表面硬化層を持つＦｅ−Ａｌ系合金材を
得た。EXAMPLES The present invention will now be described in more detail with reference to examples. [Example 1] Precipitation hardening type stainless steel (Fe-16Cr
-4Ni-4Cu-0.3Nb) having a thickness of 10 mm was prepared. This plate was heated to 1040 ° C. in a nitrogen atmosphere, kept for 30 minutes, and then cooled with water. After roughening the both surfaces, an Al-10Fe alloy foil having a thickness of 40 μm was overlapped on both surfaces and clad-rolled to obtain a laminated material having a thickness of 9 mm. This laminated material was cut into a predetermined shape and heated in the atmosphere at a temperature of 480 ° C. for 1 hour. As a result, as shown in FIG.
l 3, Fe to form a 2 Al intermetallic compound such as 5, to obtain a Fe-Al based alloy material having a surface hardened layer of about 35μm from the surface.
【００１０】［実施例２］析出硬化型ステンレス鋼（Ｆ
ｅ−１７Ｃｒ−７Ｎｉ−１．２Ａｌ）の厚さ５ｍｍの板
を用意した。この板を窒素雰囲気中で１０５０℃に加熱
して１時間保持後水冷した。その両面を粗化した後に、
両面に厚さ２０μｍのＡｌ−８Ｆｅ合金箔を重ねてクラ
ッド圧延して、厚さ４，５ｍｍの積層材とした。この積
層材を所定の形に切断し、大気中で５１０℃の温度で６
０分間加熱後、空冷した。これにより図１に示すように
ＦｅＡｌ3 、Ｆｅ2 Ａｌ5 等の金属間化合物を形成し、
表面より約１５μｍの表面硬化層を持つＦｅ−Ａｌ合金
材を得た。[Example 2] Precipitation hardening type stainless steel (F
A plate having a thickness of 5 mm (e-17Cr-7Ni-1.2Al) was prepared. This plate was heated to 1050 ° C. in a nitrogen atmosphere, kept for 1 hour, and then cooled with water. After roughening both sides,
A 20 μm thick Al-8Fe alloy foil was overlaid on both sides and clad rolled to obtain a laminated material having a thickness of 4,5 mm. This laminated material is cut into a predetermined shape, and is cut at a temperature of 510 ° C in the atmosphere for 6
After heating for 0 minutes, it was air-cooled. This forms intermetallic compounds such as FeAl 3 , Fe 2 Al 5 as shown in FIG.
An Fe-Al alloy material having a surface hardened layer having a thickness of about 15 μm from the surface was obtained.
【００１１】［実施例３］マルエージング鋼（Ｆｅ−１
８Ｎｉ−１２Ｃｏ−４Ｍｏ−１．７Ｔｉ−０．１Ａｌ）
の厚さ２．５ｍｍの板を用意した。この板を大気中で８
４０℃に加熱して３０分間保持した後空冷した。その両
面を粗化した後に両面に厚さ８μｍのＡｌ−５Ｆｅ合金
箔を重ねてクラッド圧延して、厚さ２．３ｍｍの積層材
とした。この積層材を所定の形に切断し、大気中で５０
０℃で３時間加熱して保持後空冷した。これにより図１
に示すようにＦｅＡｌ3 、Ｆｅ2 Ａｌ5 等の金属間化合
物を形成し、表面より約５μｍの表面硬化層を持つＦｅ
−Ａｌ系合金材を得た。[Example 3] Maraging steel (Fe-1
8Ni-12Co-4Mo-1.7Ti-0.1Al)
A plate having a thickness of 2.5 mm was prepared. 8 this plate in the atmosphere
It was heated to 40 ° C., kept for 30 minutes, and then air-cooled. After roughening both surfaces, an Al-5Fe alloy foil having a thickness of 8 μm was superposed on both surfaces and clad rolled to obtain a laminated material having a thickness of 2.3 mm. This laminated material is cut into a predetermined shape, and is cut in the air at 50
The mixture was heated at 0 ° C. for 3 hours, held and air-cooled. As a result,
As shown in Fig. 3 , Fe that forms an intermetallic compound such as FeAl 3 and Fe 2 Al 5 and has a surface hardened layer of about 5 μm from the surface.
An -Al alloy material was obtained.
【００１２】［実施例４］マルエージング鋼（Ｆｅ−１
８Ｎｉ−８Ｃｏ−５Ｍｏ−０．４Ｔｉ−０．１Ａｌ）の
厚さ４ｍｍの板を用意した。この板を８５０℃に加熱し
たＡｌ−３Ｆｅ合金の溶湯中に浸し、厚さ５μｍの溶融
メッキを施した後、圧延して厚さ３．９ｍｍの積層材と
した。この積層材を所定の形に切断し、大気中で４８０
℃で３時間加熱して保持後空冷した。これにより図１に
示すようにＦｅＡｌ3 、Ｆｅ2 Ａｌ 5 等の金属間化合物
を形成し、表面より約３μｍの表面硬化層を持つＦｅ−
Ａｌ系合金材を得た。[Example 4] Maraging steel (Fe-1
8Ni-8Co-5Mo-0.4Ti-0.1Al)
A plate having a thickness of 4 mm was prepared. Heat this plate to 850 ° C
Immersed in molten Al-3Fe alloy and melted to a thickness of 5 μm
After applying plating, roll and laminate with a thickness of 3.9 mm
did. This laminated material is cut into a predetermined shape and 480
The mixture was heated at 0 ° C. for 3 hours, held and air-cooled. As a result,
FeAl as shown3, Fe2Al FiveIntermetallic compounds such as
And Fe- having a surface hardened layer of about 3 μm from the surface
An Al-based alloy material was obtained.
【００１３】［比較例１］析出硬化型ステンレス鋼（Ｆ
ｅ−１６Ｃｒ−４Ｎｉ−４Ｃｕ−０．３Ｎｂ）の厚さ８
ｍｍの板を用意した。この板を所定の形状に切断し、窒
素雰囲気中で１０４０℃に加熱して３０分間保持した後
水冷し、その後大気中で４８０℃で１時間加熱して材料
を得た。[Comparative Example 1] Precipitation hardening type stainless steel (F
e-16Cr-4Ni-4Cu-0.3Nb) thickness 8
A mm plate was prepared. This plate was cut into a predetermined shape, heated to 1040 ° C. in a nitrogen atmosphere, held for 30 minutes, cooled with water, and then heated in air at 480 ° C. for 1 hour to obtain a material.
【００１４】［比較例２］高炭素ステンレス鋼（Ｆｅ−
１３．５Ｃｒ−１．２Ｍｏ−０．４Ｃ−０．３Ｓｉ−
０．３Ｍｎ）の厚さ２ｍｍの板を用意した。この板を所
定形状に切断し、Ａｒ雰囲気中で１０５０℃の温度で６
０秒加熱後、毎秒６０℃で冷却を行って材料を得た。[Comparative Example 2] High carbon stainless steel (Fe-
13.5Cr-1.2Mo-0.4C-0.3Si-
A plate having a thickness of 0.3 Mn and a thickness of 2 mm was prepared. This plate is cut into a predetermined shape, and is cut at a temperature of 1050 ° C. in an Ar atmosphere for 6
After heating for 0 second, the material was obtained by cooling at 60 ° C. per second.
【００１５】［比較例３］アルミナ粉末を加圧成形し、
焼結し、所定の形状に加工し、材料を得た。
［比較例４］析出硬化型ステンレス鋼（Ｆｅ−１６Ｃｒ
−４Ｎｉ−４Ｃｕ−０．３Ｎｂ）の厚さ１０ｍｍの板を
用意した。この板を窒素雰囲気中で１０４０℃に加熱し
て３０分間保持した後水冷した。その両面を粗化した後
に両面に４０μｍのＡｌ箔を重ねてクラッド圧延して、
厚さ９．５ｍｍの積層材とした。この積層材を所定の形
に切断し、大気中で４８０℃の温度で１時間加熱を行っ
た。これにより、図４に示すように表面層と基材のステ
ンレス鋼の界面近傍には２μｍの厚さのＦｅＡｌ3 、Ｆ
ｅ2 Ａｌ5 の金属間化合物を形成して硬化するが、表面
より約３５μｍはＡｌ層のままのＦｅ−Ａｌ系合金材を
得た。なお、図４で符号１は基材（母材）、２′は界面
にＦｅＡｌ3 等の金属間化合物を形成した部分、４はＡ
ｌ層である。[Comparative Example 3] Alumina powder was pressure-molded,
The material was obtained by sintering and processing into a predetermined shape. [Comparative Example 4] Precipitation hardening type stainless steel (Fe-16Cr
-4Ni-4Cu-0.3Nb) having a thickness of 10 mm was prepared. This plate was heated to 1040 ° C. in a nitrogen atmosphere, held for 30 minutes, and then cooled with water. After roughening both sides, 40 μm Al foils are overlaid on both sides and clad rolled,
It was a laminated material having a thickness of 9.5 mm. This laminated material was cut into a predetermined shape and heated in the atmosphere at a temperature of 480 ° C. for 1 hour. As a result, as shown in FIG. 4, in the vicinity of the interface between the surface layer and the stainless steel of the base material, FeAl 3 , F having a thickness of 2 μm was formed.
Although an intermetallic compound of e 2 Al 5 was formed and hardened, an Fe—Al-based alloy material having an Al layer of about 35 μm from the surface was obtained. In FIG. 4, reference numeral 1 is a base material (base material), 2'is a portion where an intermetallic compound such as FeAl 3 is formed on the interface, and 4 is A.
It is the l-layer.
【００１６】上記実施例１乃至実施例４、比較例１乃至
比較例４で得たもの基材の硬度、表面硬化層の硬度を測
定した結果を表１に示す。この表１の結果より本発明の
実施例のものは靭性や剛性に優れ、表面硬度も高くて耐
摩耗性を有することがわかる。Table 1 shows the results of measuring the hardness of the substrate and the hardness of the surface hardened layer obtained in Examples 1 to 4 and Comparative Examples 1 to 4. From the results of Table 1, it can be seen that the examples of the present invention have excellent toughness and rigidity, high surface hardness, and wear resistance.
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【発明の効果】本発明は叙述のように４５０℃以上５５
０℃以下での熱処理により硬化するＦｅ合金の基材にＦ
ｅを含有するＡｌ合金の表面層を形成し、基材の硬化熱
処理温度で熱処理するので、表面硬化層の形成と基材の
硬度、剛性上昇が同時になされるため、靭性があり、耐
摩耗性に優れた材料を製造できるものであり、またその
際、表面層を形成するのが０．５〜１５重量％のＦｅを
含有するＡｌ合金であるため、５００℃前後の熱処理温
度でも１時間程度の短時間でＡｌが完全に拡散して金属
間化合物（例えばＦｅＡｌ3 ）となり、量産性も向上す
るものであり、さらに表面硬化層は基材のＦｅ、表面層
のＦｅ、表面層のＡｌの相互拡散により得られるので、
密着性が非常によく、剥離の可能性が低いものである。According to the present invention, as described above, the temperature is 450 ° C. or more and 55 or more.
F is used as the base material of an Fe alloy that is hardened by heat treatment at 0 ° C or less.
Since a surface layer of an Al alloy containing e is formed and heat-treated at the heat treatment temperature for hardening the base material, the formation of the surface hardened layer and the increase in hardness and rigidity of the base material are performed at the same time, resulting in toughness and wear resistance. It is possible to manufacture a material excellent in heat resistance, and at that time, since the surface layer is formed of an Al alloy containing 0.5 to 15% by weight of Fe, even at a heat treatment temperature of about 500 ° C., it takes about 1 hour. In a short time, Al is completely diffused to form an intermetallic compound (for example, FeAl 3 ), which improves the mass productivity. Further, the surface hardened layer includes Fe of the base material, Fe of the surface layer, and Al of the surface layer. Since it is obtained by mutual diffusion,
The adhesion is very good and the possibility of peeling is low.
【図１】本発明により得られたＦｅ−Ａｌ系合金の構造
を説明する説明図である。FIG. 1 is an explanatory diagram illustrating the structure of an Fe—Al-based alloy obtained according to the present invention.
【図２】基材にＡｌ合金箔を積層する状態を説明する説
明図である。FIG. 2 is an explanatory diagram illustrating a state in which an Al alloy foil is laminated on a base material.
【図３】基材に表面層としてのＡｌ合金層を形成した状
態を説明する説明図である。FIG. 3 is an explanatory diagram illustrating a state in which an Al alloy layer as a surface layer is formed on a base material.
【図４】比較例４で得られたものを説明する説明図であ
る。FIG. 4 is an explanatory diagram illustrating that obtained in Comparative Example 4;
１ 基材（母材）
２ ＦｅＡｌ3 等の金属間化合物が形成された表面硬化
層1 Base material (base material) 2 Surface hardened layer on which an intermetallic compound such as FeAl 3 is formed
フロントページの続き (56)参考文献 特開 昭59−35669（ＪＰ，Ａ) 特開 昭58−45367（ＪＰ，Ａ) 特開 昭52−90431（ＪＰ，Ａ) 特開 平９−228024（ＪＰ，Ａ) 特開 平９−104962（ＪＰ，Ａ) 特開 平６−121882（ＪＰ，Ａ) 特開 平４−250995（ＪＰ，Ａ) 特開 平７−18410（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C23C 10/28 C22C 38/06 C22C 21/00 Continuation of the front page (56) Reference JP-A-59-35669 (JP, A) JP-A-58-45367 (JP, A) JP-A-52-90431 (JP, A) JP-A-9-228024 (JP , A) JP-A-9-104962 (JP, A) JP-A-6-121882 (JP, A) JP-A-4-250995 (JP, A) JP-A-7-18410 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) C23C 10/28 C22C 38/06 C22C 21/00
Claims (2)
より硬化するＦｅ合金の基材の表面に０．５〜１５重量
％のＦｅを含有するＡｌ合金の表面層を形成し、この得
られた材料を上記基材の硬化に適した温度、時間で熱処
理し、上記材料中のＦｅとＡｌを拡散させ、基材のＦｅ
及び表面層のＡｌ合金に含有されるＦｅと表面層のＡｌ
合金のＡｌとの間に金属間化合物を形成し、表面に厚さ
２〜５０μｍの表面硬化層を形成すると同時に母材の強
度も増大させることを特徴とする表面硬化Ｆｅ−Ａｌ系
合金の製造方法。1. A surface layer of an Al alloy containing 0.5 to 15% by weight of Fe is formed on the surface of a base material of an Fe alloy which is hardened by heat treatment at 450 ° C. or higher and 550 ° C. or lower. The material is heat-treated at a temperature and time suitable for curing the above-mentioned base material to diffuse Fe and Al in the above-mentioned material and
And Fe contained in the Al alloy of the surface layer and Al of the surface layer
Manufacture of a surface-hardened Fe-Al alloy characterized by forming an intermetallic compound with Al of an alloy to form a surface-hardened layer having a thickness of 2 to 50 μm on the surface and at the same time increasing the strength of a base material. Method.
より硬化するＦｅ合金の基材の表面に０．５〜１０重量
％のＦｅを含有するＡｌ合金の表面層を圧延により積層
し、この得られた材料を上記基材の硬化に適した温度、
時間で熱処理し、上記材料中のＦｅとＡｌを拡散させ、
基材のＦｅ及び表面層のＡｌ合金に含有されるＦｅと表
面層のＡｌ合金のＡｌとの間に金属間化合物を形成し、
表面に厚さ２〜５０μｍの表面硬化層を形成すると同時
に母材の強度も増大させることを特徴とする表面硬化Ｆ
ｅ−Ａｌ系合金の製造方法。2. A surface layer of an Al alloy containing 0.5 to 10% by weight of Fe is laminated by rolling on the surface of a base material of an Fe alloy which is hardened by heat treatment at 450 ° C. or higher and 550 ° C. or lower. A material suitable for curing the substrate,
Heat treatment for a time to diffuse Fe and Al in the above material,
An intermetallic compound is formed between Fe of the base material and Fe contained in the Al alloy of the surface layer and Al of the Al alloy of the surface layer,
Surface hardening F characterized by forming a surface hardened layer having a thickness of 2 to 50 μm on the surface and simultaneously increasing the strength of the base material
A method for manufacturing an e-Al alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25266396A JP3463481B2 (en) | 1996-09-25 | 1996-09-25 | Method for producing surface hardened Fe-Al alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25266396A JP3463481B2 (en) | 1996-09-25 | 1996-09-25 | Method for producing surface hardened Fe-Al alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10102233A JPH10102233A (en) | 1998-04-21 |
| JP3463481B2 true JP3463481B2 (en) | 2003-11-05 |
Family
ID=17240503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25266396A Expired - Fee Related JP3463481B2 (en) | 1996-09-25 | 1996-09-25 | Method for producing surface hardened Fe-Al alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3463481B2 (en) |
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| CN109055890A (en) * | 2018-08-29 | 2018-12-21 | 南京星乔威泰克汽车零部件有限公司 | The preparation method of unimach hot forming protection composite coating |
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|---|---|---|---|---|
| JP5566417B2 (en) * | 2012-04-19 | 2014-08-06 | 新日鐵住金株式会社 | Manufacturing method of perforated plug |
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1996
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109055890A (en) * | 2018-08-29 | 2018-12-21 | 南京星乔威泰克汽车零部件有限公司 | The preparation method of unimach hot forming protection composite coating |
| CN109055890B (en) * | 2018-08-29 | 2020-04-28 | 南京星乔威泰克汽车零部件有限公司 | Preparation method of ultra-high strength steel hot forming protective composite coating |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10102233A (en) | 1998-04-21 |
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