JPS6229138B2 - - Google Patents
Info
- Publication number
- JPS6229138B2 JPS6229138B2 JP6147681A JP6147681A JPS6229138B2 JP S6229138 B2 JPS6229138 B2 JP S6229138B2 JP 6147681 A JP6147681 A JP 6147681A JP 6147681 A JP6147681 A JP 6147681A JP S6229138 B2 JPS6229138 B2 JP S6229138B2
- Authority
- JP
- Japan
- Prior art keywords
- casting
- hardening
- powder
- hardening material
- high carbon
- 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.)
- Expired
Links
- 239000000463 material Substances 0.000 claims description 29
- 238000005266 casting Methods 0.000 claims description 26
- 239000000843 powder Substances 0.000 claims description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 14
- 229910052684 Cerium Inorganic materials 0.000 claims description 13
- 229910000604 Ferrochrome Inorganic materials 0.000 claims description 13
- 229910052799 carbon Inorganic materials 0.000 claims description 13
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 239000005011 phenolic resin Substances 0.000 claims description 5
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 2
- 229920001568 phenolic resin Polymers 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000008119 colloidal silica Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Description
【発明の詳細な説明】
この発明は鋳込硬化用硬化材の改良に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in hardening materials for cast hardening.
鋳型の内面に各種金属材料を含む硬化材層を設
けておき、鋳造時に溶融金属を注湯することによ
つて、鋳物の表面部分を硬化させるようにしたも
のを鋳込硬化用鋳型というが、この鋳込硬化用鋳
型、およびそれにより得られる鋳物は次のような
構成からなつていた。 A hardening material layer containing various metal materials is provided on the inner surface of the mold, and the surface of the casting is hardened by pouring molten metal during casting, which is called a casting hardening mold. This cast hardening mold and the casting obtained thereby had the following configuration.
すなわち、第１図に示すように鋳造しようとす
る鋳物の形状に応じて造型された鋳型１、その中
心部に鋳型空所３、更に鋳型空所３の一部の鋳壁
面には硬化材層２が設けられている。鋳型１は
CO2プロセスやフランプロセス等で造型され、硬
化材層２は、高炭素フエロクロム粉末、フエノー
ル樹脂、コロイダルシリカおよびアルコール溶剤
の混合物である硬化材を塗布し、乾燥させたもの
である。第２図は第１図を−線矢視方向から
みた横断平面図である。 That is, as shown in FIG. 1, a mold 1 is formed according to the shape of a casting to be cast, a mold cavity 3 is formed in the center of the mold, and a hardened material layer is formed on a part of the casting wall of the mold cavity 3. 2 is provided. Mold 1 is
The hardening material layer 2 is formed by applying a hardening material, which is a mixture of high carbon ferrochrome powder, phenol resin, colloidal silica, and alcohol solvent, and drying the molded material by a CO 2 process, a furan process, or the like. FIG. 2 is a cross-sectional plan view of FIG. 1 viewed from the - line arrow direction.
鋳型１の上方より溶湯を注湯して鋳造される鋳
物の横断平面図が第３図の４であり、一部には硬
化層５がある。Ｄは硬化層５の厚さを示し、Ｔは
鋳物４の肉厚を示す。 A cross-sectional plan view of a casting that is cast by pouring molten metal from above the mold 1 is shown at 4 in FIG. 3, and a part thereof has a hardened layer 5. D indicates the thickness of the hardened layer 5, and T indicates the 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
エロクロムが溶融し、前記、溶融金属と合金を作
つて凝固する。この合金層には多量の炭化物が生
じるので硬化材層２に接した部分の表面部だけ硬
い鋳物４を鋳造することができる。鋳造時におい
ては、注入時の溶湯の熱によつて硬化材層２が溶
かされて、鋳物４の内部へ拡散して行くが、その
場合、硬化材の浸入する深さは溶湯の熱量、すな
わち溶湯の温度と鋳物４の肉厚によつて決まる。
従つて、鋳物４の厚肉部分では熱量が多いので硬
化材の浸入する深さが深くなるが、その結果、硬
化材の濃度がうすくなり、その部分の硬さが低く
なつて所望の硬さが得られないことがある。 When molten metal (molten 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, causing the , make an alloy with molten metal and solidify it. Since a large amount of carbide is generated in this alloy layer, it is possible to cast a casting 4 that is hard only in the surface portion that is in contact with the hardened material layer 2. During casting, the hardening material layer 2 is melted by the heat of the molten metal during pouring and diffuses into the casting 4. In this case, the depth to which the hardening material penetrates is determined by the amount of heat of the molten metal, i.e. It is determined by the temperature of the molten metal and the thickness of the casting 4.
Therefore, since the amount of heat is large in the thick part of the casting 4, the depth into which the hardening material penetrates becomes deeper, but as a result, the concentration of the hardening material becomes thinner, and the hardness of that part becomes lower, so that the desired hardness cannot be achieved. may not be obtained.
本発明者等の経験によれば、低炭素鋼で注湯温
度1600℃、鋳物４の肉厚40mm程度では、硬化層５
の硬さをビツカースかたさ400（Hv）とすること
は非常に困難であつた。一方、一般に耐摩耗機械
部品としては硬さ400（Hv）を必要とする場合が
多いので、上記の硬化材濃度の低下による硬さの
低下を防止する必要があつた。 According to the experience of the present inventors, when the pouring temperature is 1600℃ and the thickness of the casting 4 is about 40mm, the hardened layer 5
It was extremely difficult to achieve a Bitkers hardness of 400 (Hv). On the other hand, since wear-resistant mechanical parts generally require a hardness of 400 (Hv) in many cases, it was necessary to prevent the decrease in hardness due to the decrease in hardening agent concentration.
本発明者等は上記の目的を達成するために研究
を重ねた結果、従来の硬化材における高炭素フエ
ロクロム粉末の0.05〜18重量％に相当するセリウ
ム粉末を加えた硬化材を用いるという本発明に到
達したものである。 As a result of repeated research to achieve the above object, the present inventors have developed the present invention, which uses a hardening material to which cerium powder is added in an amount equivalent to 0.05 to 18% by weight of high carbon ferrochrome powder in conventional hardening materials. It has been reached.
本発明は高炭素フエロクロム粉末（粒径20〜50
μ）、粘結用のフエノール樹脂、セリウム粉末お
よびアルコールからなる鋳込硬化用硬化材に関
し、セリウム粉末を高炭素フエロ−クロム粉末に
対し0.05〜18重量％加えるものである。 The present invention uses high carbon ferrochrome powder (particle size 20-50
μ) Regarding a hardening agent for casting hardening consisting of a phenolic resin for caking, cerium powder and alcohol, 0.05 to 18% by weight of cerium powder is added to the high carbon ferrochrome powder.
本発明硬化材におけるセリウムは強力な白銑化
促進元素であるので、高炭素フエロ・クロムの作
用を助長し硬化層５内の炭化物を増加させ、硬化
層５を硬くする効果がある。また本発明の硬化材
を鋳鉄の鋳物４に応用した場合には、セリウムの
作用によつて鋳物４の表面部分に晶出する黒鉛が
球状または擬球状となり、その部分の強度が向上
する効果もある。 Since cerium in the hardened material of the present invention is a strong whitening promoting element, it promotes the action of high carbon ferrochromium, increases the amount of carbides in the hardened layer 5, and has the effect of hardening the hardened layer 5. Furthermore, when the hardening material of the present invention is applied to a cast iron casting 4, the graphite crystallized on the surface of the casting 4 becomes spherical or pseudospherical due to the action of cerium, thereby improving the strength of that area. be.
本発明者等の多くの実験によると、セリウム粉
末の高炭素フエロ−クロム粉末に対する割合は、
0.05重量％以下では従来の硬化材の場合と特に変
つたところがなく、また18重量％以上では相対的
に高炭素フエロ・クロム粉末の量が少なくなるの
で、硬化層５の硬さが逆に低下し好ましくなかつ
た。 According to many experiments conducted by the inventors, the ratio of cerium powder to high carbon ferrochromium powder is:
If it is less than 0.05% by weight, there is no particular difference from the case of conventional hardening materials, and if it is more than 18% by weight, the amount of high carbon ferrochromium powder becomes relatively small, so the hardness of the hardened layer 5 decreases. I didn't like it.
セリウム粉末として、セリウムを50％含んだミ
ツシユメタルの粉末を用い、セリウムの量が上記
の範囲となるように用いることができる。 As the cerium powder, Mitsushi Metal powder containing 50% cerium can be used so that the amount of cerium falls within the above range.
本発明硬化材のセリウム粉末以外の各成分範囲
は次の通りである。 The range of each component other than cerium powder in the hardening material of the present invention is as follows.
高炭素フエロ・クロム：60〜96重量％、60％以下
では硬化作用が低くなり、また96％以上では塗
布後の乾燥状態で剥離し易い。High carbon ferrochrome: 60 to 96% by weight. If it is less than 60%, the curing effect will be low, and if it is more than 96%, it will be easy to peel off when dry after application.
フエノール樹脂：0.5〜18重量％、0.5％以下では
硬化材の粘結力が不足するので同様に剥離を生
じ、８％以上では全体に占める割合が多くなる
ので硬化材の硬化作用が低下する。Phenol resin: 0.5 to 18% by weight; if it is less than 0.5%, the curing force of the hardening material is insufficient, resulting in peeling, and if it is more than 8%, the curing effect of the hardening material decreases because it accounts for a large proportion of the total.
アルコール：硬化材の鋳型への塗布を容易にする
ために必要な溶剤であり、乾燥によつて蒸発す
ること、また、かなり広い範囲で使用が可能で
あることから規定することが困難であるが、作
業面から５％以上は必要であり、50％以上では
相対的に高炭素フエロ・クロム粉末の量が少な
くなるので塗布作業に長時間を要し、好ましく
ない。Alcohol: A necessary solvent to make it easier to apply the hardening material to the mold.Alcohol is difficult to define because it evaporates upon drying and can be used over a fairly wide range of areas. , 5% or more of the working surface is required, and if it is more than 50%, the amount of high carbon ferro-chromium powder becomes relatively small and the coating operation takes a long time, which is not preferable.
この他、コロイダルシリカ粉末を硬化材の分散
剤として、５％以下程度の少量添加することもで
きる。 In addition, colloidal silica powder can also be added in a small amount of about 5% or less as a dispersant for the hardening agent.
本発明の硬化材を使用した場合も、その鋳造法
は従来の硬化材を使用した場合と同じである。 Even when the hardening material of the present invention is used, the casting method is the same as when using the conventional hardening material.
実施例
硬化材として高炭素フエロクロム粉末65重量
％、フエノール樹脂5.0重量％、メチルアルコー
ル25重量％、コロイダルシリカ２重量％、セリウ
ム粉末３重量％の混合液を各種肉厚の鋳型（フラ
ン型）内面に塗布し、炭素鋼の溶湯を鋳込温度
1600℃で注湯した場合、表面から６mm程度までの
硬化部の硬さが400（Hv）以上となつた。この場
合、非硬化部（鋳物の中心部）の硬さは140〜
160Hvであつた。このように鋳物の厚肉部におい
ても表面部の硬さを400（Hv）以上にできること
は各種機械部品の製造上、非常に有益である。Example A mixed solution of 65% by weight of high carbon ferrochrome powder, 5.0% by weight of phenol resin, 25% by weight of methyl alcohol, 2% by weight of colloidal silica, and 3% by weight of cerium powder was applied to the inner surface of molds (furan molds) of various thicknesses as hardening materials. and pour the molten carbon steel to the casting temperature.
When poured at 1600℃, the hardness of the hardened area up to about 6mm from the surface was over 400 (Hv). In this case, the hardness of the unhardened part (center of the casting) is 140~
It was 160Hv. In this way, the ability to increase the surface hardness of thick-walled parts of castings to 400 (Hv) or higher is extremely useful in the production of various mechanical parts.
本発明硬化材は一般的には鉄鋼材料の鋳込硬化
用硬化材として用いるが、製品としては、掘さく
用カツターチツプのように、耐摩耗性を要するよ
うな機械部品の鋳造に応用される。 The hardening material of the present invention is generally used as a hardening material for casting hardening of steel materials, but as a product, it is applied to the casting of machine parts that require wear resistance, such as cutter tips for digging.
第１図は鋳込硬化用鋳型の縦断側面図であり、
第２図は第１図の−線矢視方向からみた横断
平面図であり、第３図は第１，２図の鋳型を用い
て得られる鋳物の横断平面図である。
FIG. 1 is a longitudinal cross-sectional side view of a casting mold for hardening.
2 is a cross-sectional plan view seen from the direction of the - line arrow in FIG. 1, and FIG. 3 is a cross-sectional plan view of a casting obtained using the molds shown in FIGS. 1 and 2.
Claims (1)
脂、セリウム粉末、アルコールからなり、セリウ
ム粉末の量が高炭素フエロ−クロム粉末の量の
0.05〜18重量％であることを特徴とする、鋳込硬
化用硬化材。1 Consists of high carbon ferrochrome powder, phenolic resin, cerium powder, and alcohol, and the amount of cerium powder is less than the amount of high carbon ferrochrome powder.
A hardening material for casting hardening characterized by a content of 0.05 to 18% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6147681A JPS57177851A (en) | 1981-04-24 | 1981-04-24 | Hardening material for casting and hardening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6147681A JPS57177851A (en) | 1981-04-24 | 1981-04-24 | Hardening material for casting and hardening |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57177851A JPS57177851A (en) | 1982-11-01 |
| JPS6229138B2 true JPS6229138B2 (en) | 1987-06-24 |
Family
ID=13172147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6147681A Granted JPS57177851A (en) | 1981-04-24 | 1981-04-24 | Hardening material for casting and hardening |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57177851A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107774890B (en) * | 2016-08-29 | 2019-04-23 | 镇江佳鑫精工设备有限公司 | A kind of casting infiltration preparation method for coating containing ferrochrome |
| CN107790682A (en) * | 2016-08-29 | 2018-03-13 | 镇江佳鑫精工设备有限公司 | A kind of method that casting infiltration prepares metal die surface composite layer |
-
1981
- 1981-04-24 JP JP6147681A patent/JPS57177851A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57177851A (en) | 1982-11-01 |
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