JPS583746A - Alloying material for surface layer of casting - Google Patents
Alloying material for surface layer of castingInfo
- Publication number
- JPS583746A JPS583746A JP9840181A JP9840181A JPS583746A JP S583746 A JPS583746 A JP S583746A JP 9840181 A JP9840181 A JP 9840181A JP 9840181 A JP9840181 A JP 9840181A JP S583746 A JPS583746 A JP S583746A
- Authority
- JP
- Japan
- Prior art keywords
- casting
- weight
- powder
- nickel
- chromium
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/08—Casting in, on, or around objects which form part of the product for building-up linings or coverings, e.g. of anti-frictional metal
Abstract
Description
【発明の詳細な説明】
本発明は鋳物表層合金化材の改良に関するものであり、
特に鋳物表面層に耐食性及び耐酸化性を賦与するための
鋳物表面合金化材を提供せんとするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in surface alloyed materials for castings,
In particular, it is an object of the present invention to provide a casting surface alloying material for imparting corrosion resistance and oxidation resistance to a casting surface layer.
現在まで耐食性及び耐酸化性を改善させるための鋳物表
層合金化材はなかった。しかしながら、一般的に知られ
る鋳込硬化用硬化材も鋳鋼（炭素鋼）の耐食性及び耐酸
化性を多少改善させることができるので、この鋳込硬化
法及び硬化材について先ず説明する。Until now, there has been no surface alloying material for castings to improve corrosion resistance and oxidation resistance. However, since the generally known hardening material for cast hardening can also improve the corrosion resistance and oxidation resistance of cast steel (carbon steel) to some extent, this casting hardening method and hardening material will be explained first.
第１図は従来の鋳込硬化用鋳型の縦断側面図、第２図は
第１図を■−■線矢視方向から見た横断平面図である。FIG. 1 is a longitudinal cross-sectional side view of a conventional casting mold for hardening, and FIG. 2 is a cross-sectional plan view of FIG.
第３図は第１図及び第２図シて示す鋳込硬化用鋳型を用
いて鋳造した鋳物の横断平面図である。FIG. 3 is a cross-sectional plan view of a casting cast using the casting mold shown in FIGS. 1 and 2. FIG.
第１図〜第５図に従って各部の構造を説明すると。The structure of each part will be explained according to FIGS. 1 to 5.
１はＣ０２プロセスやフランプロセス等で造型された鋳
型、２は鋳型１内面の一部に設けられた硬化材層であっ
て、主として高炭素フエロクロム粉末、フェノール樹脂
、コロイダルシリカ及びアルコール溶剤の混合物である
硬化材を塗布し、乾燥させたものである。３は鋳型１内
面とｔ化ノオ層２面とによって所望の形状に造型された
鋳型空所である。1 is a mold made by the C02 process or furan process, etc. 2 is a hardening material layer provided on a part of the inner surface of the mold 1, which is mainly made of a mixture of high carbon ferrochrome powder, phenolic resin, colloidal silica, and alcohol solvent. A hardening agent is applied and dried. Reference numeral 3 denotes a mold cavity formed into a desired shape by the inner surface of the mold 1 and the two surfaces of the t-oxide layer.
４は鋳造された鋳物であって一部には硬化層５がある。Reference numeral 4 denotes a cast product, and a part thereof has a hardened layer 5.
Ｄは硬化層５の厚さ全示し、Ｔは鋳物４の肉厚を示す。D indicates the total thickness of the hardened layer 5, and T indicates the wall thickness of the casting 4.
硬化材層２を所望個所に設けた鋳型１の上方から、鋳型
空所３へ溶融金属（鋳鉄や炭素鋼の溶融したもの）を注
入すると、硬化材層２中の高炭素フェロクロムが溶融し
、前記溶融金属と合金を作って凝固する。この合金属に
は多量の炭化物が生じるので、硬化材層２に接した部分
の表層部だけ硬い鋳物４を鋳造することができる。When molten metal (melted cast iron or carbon steel) is injected into the mold cavity 3 from above the mold 1 with the hardening material layer 2 provided at the desired location, the high carbon ferrochrome in the hardening material layer 2 melts. An alloy is formed with the molten metal and solidified. Since a large amount of carbide is generated in this alloy, it is possible to cast a casting 4 that is hard only in the surface layer portion in contact with the hardened material layer 2.
上記方法は主として鋳物表面の硬化を目的としたもので
あるから、その鋳物を腐食環境や酸化性雰囲気中で使用
した場合、耐食及び耐酸化性が通常のステンレス鋼に比
較して悪く、腐食や酸化され易い。The above method is mainly aimed at hardening the surface of the casting, so when the casting is used in a corrosive or oxidizing environment, its corrosion and oxidation resistance is poorer than that of ordinary stainless steel, resulting in corrosion and oxidation. Easily oxidized.
本発明者らは、上２方法の欠点を排除できるような鋳物
表層合金化材を提供すべく鋭意研究の結果、本発明を完
成したもの、である。The present inventors have completed the present invention as a result of intensive research in order to provide a casting surface alloyed material that can eliminate the drawbacks of the above two methods.
すなわち、本発明は、低炭素フェロ・クロム粉末又はク
ロム粉末、フェロ・ニッケル粉末又はニッケル粉末、フ
ェノール樹脂及びアルコールを含んでおり、そしてクロ
ムとニッケルとの成分割合が、クロム２重量部に対して
ニッケル０．５〜２．５重量部であって、かつクロムと
ニッケルとの合計重量がアルコールを除く全体重量の２
４〜９８％である鋳物表層合金化材を要旨とするもので
ある、
本発明の鋳物表層合金化材は、鋳鉄や炭素鋼鋳物の表層
合金化材として用い、又、耐食及び耐酸化性を必要とす
る各種機械部品の鋳造に用いるのに適している。That is, the present invention contains low carbon ferro-chromium powder or chromium powder, ferro-nickel powder or nickel powder, phenolic resin, and alcohol, and the component ratio of chromium and nickel is 2 parts by weight of chromium. 0.5 to 2.5 parts by weight of nickel, and the total weight of chromium and nickel is 2 of the total weight excluding alcohol.
The casting surface alloying material of the present invention, which is a casting surface alloying material having a corrosion resistance of 4 to 98%, is used as a surface alloying material of cast iron or carbon steel castings, and also has corrosion resistance and oxidation resistance. Suitable for use in casting various required mechanical parts.
本鋳物表層合金化材を使用する場合の鋳型及び鋳物は第
１図〜第３図に示す従来の鋳込硬化用鋳型及び鋳物と虜
造がはｙ同じである。従ってその説明を省略するが、第
１図〜第５図中の２は硬化材層ではなく、低炭素フェロ
クロム粉末又はクロム粉末、フェロニッケル粉末又はニ
ッケルの粉末、フェノール樹脂及びアルコールの混合物
を塗布し、乾燥させた鋳物表層合金化材である。その場
合、クロムとニッケルとの成分割合はクロム２重量部に
対してニッケル０．５〜２．５重量部であり、かつクロ
ムとニッケルとの合計重量がアルコールを除く全体重量
の２゛４〜９８％である。The molds and castings in which the present casting surface alloyed material is used are the same in construction as the conventional cast hardening molds and castings shown in FIGS. 1 to 3. Therefore, the explanation will be omitted, but 2 in Figures 1 to 5 is not a hardening material layer, but a mixture of low carbon ferrochrome powder or chromium powder, ferronickel powder or nickel powder, phenolic resin, and alcohol is applied. , dried casting surface alloyed material. In that case, the component ratio of chromium and nickel is 0.5 to 2.5 parts by weight of nickel to 2 parts by weight of chromium, and the total weight of chromium and nickel is 2.4 to 2.5 parts by weight of the total weight excluding alcohol. It is 98%.
粉末の粒径はそれぞれ５〜５０μｍであるのが好ましい
。The particle size of each powder is preferably 5 to 50 μm.
フェノール樹脂は粉末の粘結剤として配合するもので、
全粉末に対して２〜５重量％とするのが好ましい。Phenol resin is blended as a powder binder.
The amount is preferably 2 to 5% by weight based on the total powder.
アルコールハ、各種アルコール（エチルアルコール、メ
チルアルコール、イソプロピルアルコール等）が使用で
きて、その量りま金属粉末の粒径にも左右されるが全粉
末量の０．３〜１．２倍の範囲が好ましい。Alcohol C: Various alcohols (ethyl alcohol, methyl alcohol, isopropyl alcohol, etc.) can be used, and the weight range is 0.3 to 1.2 times the total powder amount, depending on the particle size of the metal powder. preferable.
本発明の鋳物表層合金化材全使用した場合にも従来の鋳
込硬化材を使用した場合と同様に鋳造を行うことができ
る。本発明の鋳物表層合金化材を使用した場合には、鋳
造時にクロム及びニッケルが溶融し鋳物の表層部に拡散
してゆくので鋳物の表層部はクロム及びニッケルを含ん
だ合金鋼となる。Even when all of the casting surface alloyed material of the present invention is used, casting can be carried out in the same manner as when the conventional casting hardened material is used. When the casting surface alloying material of the present invention is used, chromium and nickel melt during casting and diffuse into the surface layer of the casting, so that the surface layer of the casting becomes an alloy steel containing chromium and nickel.
そして本発明の鋳物表面層合金化材を使用して鋳造した
鋳物の表面は、クロム及びニッケルを含んだ高合金鋼と
なるので、通常のニッケル・クロム鋼と同様に耐食性及
び耐酸化性が優れている。The surface of a casting cast using the casting surface layer alloying material of the present invention becomes a high-alloy steel containing chromium and nickel, so it has excellent corrosion resistance and oxidation resistance like ordinary nickel-chromium steel. ing.
こ＼で、クロム量２重量部に対してニッケル量が０．５
重量部以下では耐食及び耐酸化性がクロムだけの場合（
鋳込硬化用硬化材使用の場合）に比較してあまり向上が
見られず又ニッケル量が２．５重量部以上からは、効果
の向上の程度が少なく、またコスト高となる。さらに、
フェロクロム粉末やフェロニッケル粉末を使用する場合
には、クロムとニッケル分の合計重量を全粉末量の２４
〜９８チとすることが大切であって、２４ ｗｔ％以下
では耐食及び耐酸化性があまシ向上しない。Here, the amount of nickel is 0.5 parts by weight for 2 parts by weight of chromium.
If chromium is the only corrosion and oxidation resistance below the weight part (
When the amount of nickel exceeds 2.5 parts by weight, the degree of improvement in the effect is small and the cost increases. moreover,
When using ferrochrome powder or ferronickel powder, the total weight of chromium and nickel is 24% of the total amount of powder.
It is important to set the content to 98% by weight; if the content is less than 24% by weight, corrosion resistance and oxidation resistance will not improve significantly.
一方、フェノール樹脂は２〜５重ｊ１％が適当であり、
２．０重量−以下では、本発明鋳物表面層合金化材の乾
燥後の強度が弱く、５重量％以上では鋳造中のガス発生
量が多くなるので好ましくない。On the other hand, 2 to 5 weight j1% of phenolic resin is appropriate;
If it is less than 2.0% by weight, the strength of the alloyed material for the surface layer of a casting of the present invention after drying will be weak, and if it is more than 5% by weight, the amount of gas generated during casting will increase, which is not preferable.
アルコールの量は粉末の付着あるいは塗布を容易にする
ために全粉末重量の０．５〜１．２倍が適当である。The amount of alcohol is suitably 0.5 to 1.2 times the total weight of the powder in order to facilitate adhesion or coating of the powder.
以上のようにして、鋳物の必要部分のみを高合金化すれ
ば、鋳物の全体をニッケル・クロム鋼で鋳造する場合に
比較して、鋳造性、機械加工性、溶接性が大いに向上す
ると共に、鋳物のコストをも低減させることができる。As described above, if only the necessary parts of the casting are highly alloyed, the castability, machinability, and weldability will be greatly improved compared to when the entire casting is made of nickel-chromium steel. The cost of castings can also be reduced.
実施例
低炭素フェロ・クロム粉末（Ｊ工Ｓ低炭素フェロクロム
６号の粉末）４７重量％、ニッケル粉末２０重量％、フ
ェノール樹脂３重量％、メチルアルコール３０重量係の
混合液を作り３０φ（長さ１００ｍ５）丸棒を鋳造でき
るような鋳型に上記液を塗布（深さ６５ｍｍ）ｌ、、鋳
造を行つた。炭素鋼８Ｃ４２の試験片３０φ×１００順
′の一方側（長さ６５朋の部）の表層部を合金化し、そ
の試験片の合金化された部分（長さ６５−）について石
炭焚きボイラの排ガス中で腐食試験（１年間）を行った
。Example A mixed solution of 47% by weight of low carbon ferro-chromium powder (J Engineering S low carbon ferrochrome No. 6 powder), 20% by weight of nickel powder, 3% by weight of phenol resin, and 30% by weight of methyl alcohol was prepared. The above solution was applied to a mold capable of casting a 100 m5 round bar (depth 65 mm), and casting was performed. The surface layer of one side (length 65 mm) of a carbon steel 8C42 test piece 30φ A corrosion test (for one year) was conducted inside.
比較のため同様な方法で従来の鋳込硬化用硬化材を使・
用した場合についても試験を行ったがその結果試験片の
腐食及び酸化ｔでよる重量減は、従来の鋳込硬化用硬化
材を使用した場合が０．７８６９であったのに対して上
記本発明鋳物表面層合金化材を使用した場合は０．０３
９ ｆであった。For comparison, a conventional hardening material for casting was used in the same manner.
The weight loss due to corrosion and oxidation of the test piece was 0.7869 when using the conventional hardening material for casting, but the weight loss due to corrosion and oxidation of the test piece was 0.7869 compared to the case where the conventional hardening material for casting was used. 0.03 when using the invented casting surface layer alloyed material
It was 9 f.
第１図は従来の鋳込硬化用鋳型の縦断側面図、第２図は
第１図をＨ−…線矢視方向から見た横断平面図であり、
第５図は第１図及び第２図に示す鋳込硬化用鋳型を用い
て鋳造した鋳物の横断平面図である。
復代理人 内 １） 明
復代理人 萩 原 亮 −FIG. 1 is a vertical side view of a conventional casting mold for hardening, and FIG. 2 is a cross-sectional plan view of FIG. 1 viewed from the direction of arrow H-...
FIG. 5 is a cross-sectional plan view of a casting cast using the casting mold shown in FIGS. 1 and 2. FIG. Sub-agents 1) Meifuku agent Ryo Hagiwara -
Claims (1)
耐食性、及び耐酸化性を向上させるために、鋳造前に、
鋳型内面の必要部分に付着させておく、鋳物表層合金化
材において、その配合成分が低炭素フェロクロム粉末又
はクロム粉末、フェロニッケル粉末又はニッケル粉末、
フェノール樹脂及びアルコ−を含んでおり、その場合、
クロムとニッケルとの成分割合がクロム２重量部に対し
てニッケル０．５〜２．５重量部であって、かつ、クロ
ムとニッケルとの合計１徽かアルコールを除く全体重量
の２４％〜９８チであることを、特徴とする鋳物表層合
金化材。Before casting, in order to alloy only the surface layer of the casting and improve the corrosion resistance and oxidation resistance of the surface,
In the casting surface alloying material that is attached to the necessary parts of the inner surface of the mold, its compounding ingredients are low carbon ferrochrome powder or chromium powder, ferronickel powder or nickel powder,
Contains phenolic resin and alcohol, in which case,
The component ratio of chromium and nickel is 2 parts by weight of chromium and 0.5 to 2.5 parts by weight of nickel, and the total weight of chromium and nickel is 1 weight or 24% to 98% of the total weight excluding alcohol. Cast surface alloyed material characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9840181A JPS583746A (en) | 1981-06-26 | 1981-06-26 | Alloying material for surface layer of casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9840181A JPS583746A (en) | 1981-06-26 | 1981-06-26 | Alloying material for surface layer of casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS583746A true JPS583746A (en) | 1983-01-10 |
Family
ID=14218804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9840181A Pending JPS583746A (en) | 1981-06-26 | 1981-06-26 | Alloying material for surface layer of casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS583746A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01148448A (en) * | 1987-12-04 | 1989-06-09 | Kubota Ltd | Two layers centrifugal casting method |
| WO2009144242A1 (en) * | 2008-05-28 | 2009-12-03 | Ashland-Südchemie-Kernfest GmbH | Coating compositions for casting moulds and cores for avoiding maculate surfaces |
| CN102581217A (en) * | 2012-02-20 | 2012-07-18 | 含山县全兴内燃机配件有限公司 | Preparation method of composite casting-infiltration layer used for working inner cavities of internal-combustion engine |
-
1981
- 1981-06-26 JP JP9840181A patent/JPS583746A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01148448A (en) * | 1987-12-04 | 1989-06-09 | Kubota Ltd | Two layers centrifugal casting method |
| WO2009144242A1 (en) * | 2008-05-28 | 2009-12-03 | Ashland-Südchemie-Kernfest GmbH | Coating compositions for casting moulds and cores for avoiding maculate surfaces |
| CN102105242A (en) * | 2008-05-28 | 2011-06-22 | 阿什兰-苏德舍米-克恩费斯特有限公司 | Coating compositions for casting moulds and cores for avoiding maculate surfaces |
| EA023525B1 (en) * | 2008-05-28 | 2016-06-30 | Асхланд-Зюдхеми-Кернфест Гмбх | Coating composition for casting moulds and cores, casting mould for casting metals and method for producing the same |
| CN102581217A (en) * | 2012-02-20 | 2012-07-18 | 含山县全兴内燃机配件有限公司 | Preparation method of composite casting-infiltration layer used for working inner cavities of internal-combustion engine |
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