JPS622897B2 - - Google Patents
Info
- Publication number
- JPS622897B2 JPS622897B2 JP17577680A JP17577680A JPS622897B2 JP S622897 B2 JPS622897 B2 JP S622897B2 JP 17577680 A JP17577680 A JP 17577680A JP 17577680 A JP17577680 A JP 17577680A JP S622897 B2 JPS622897 B2 JP S622897B2
- Authority
- JP
- Japan
- Prior art keywords
- casting
- hardening
- mold
- hardening material
- oxidizing agent
- 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 33
- 238000005266 casting Methods 0.000 claims description 32
- 239000007800 oxidant agent Substances 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052580 B4C Inorganic materials 0.000 claims description 7
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 239000008119 colloidal silica Substances 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 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 229920001568 phenolic resin Polymers 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 19
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 5
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910001208 Crucible steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 235000013980 iron oxide Nutrition 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Mold Materials And Core Materials (AREA)
Description
【発明の詳細な説明】
本発明は、薄肉の鋳物であつても良好な表面硬
化層を形成することのできる鋳込硬化用硬化材に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hardening material for casting hardening that can form a good surface hardening layer even in thin castings.
従来、鋳込硬化用鋳型としては、第１図および
該第１図の−線矢視断面図である第２図に示
すようなものが知られている。 BACKGROUND ART Conventionally, casting molds for hardening casting are known as shown in FIG. 1 and FIG. 2, which is a sectional view taken along the line -2 in FIG.
第１，２図において、１はCO2プロセスやフラ
ンプロセス等で造型された鋳型、２は該鋳型１内
面の一部（所望個所）に設けられた硬化材層で、
該硬化材層２は、主としてボロンカーバイト粉
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。３は鋳型１内面と硬化材層
２面とによつて所望の形に造形された鋳型空所で
ある。 In FIGS. 1 and 2, 1 is a mold molded by a CO 2 process or furan process, etc., 2 is a hardening material layer provided on a part (desired location) of the inner surface of the mold 1,
The hardening material layer 2 is obtained by applying a hardening material mainly consisting of a mixture of boron carbide powder, phenolic resin, colloidal silica, and alcohol solvent and drying it. 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 hardened material layer.
この鋳型１の上方から鋳型空所３へ溶湯（例え
ば、低炭素鋼）を注入すると、硬化材層２中のボ
ロンカーバイトが溶融し、低炭素鋼と合金を作つ
て凝固する。この合金層には多量の炭化物が生じ
るので、表面層だけ硬い鋳物を鋳造することがで
きる。 When molten metal (for example, low carbon steel) is injected into the mold cavity 3 from above the mold 1, the boron carbide in the hardened material layer 2 melts, forms an alloy with the low carbon steel, and solidifies. Since a large amount of carbide is generated in this alloy layer, it is possible to cast a casting that is hard only in the surface layer.
第３図はこの鋳物の横断平面図であり、４が鋳
物、５が硬化層、Ｄは該硬化層５の厚さ、Ｔは鋳
物４の肉厚を示す。 FIG. 3 is a cross-sectional plan view of this casting, where 4 is the casting, 5 is the hardened layer, D is the thickness of the hardened layer 5, and T is the wall thickness of the casting 4.
しかし、上記の鋳型においては次のような欠点
がある。注入時の溶湯の熱によつて硬化材層２が
溶かされるが、その溶かされる量は溶湯の熱量す
なわち溶湯の温度とその部分の肉厚によつて決ま
る。従つて、肉厚Ｔの薄い鋳物４では、硬化材層
２の溶かされる量が少ないので、硬化層５の厚さ
Ｄは薄いものとなる。一般に、低炭素鋼では注湯
温度を1600℃以上にすると、通常の鋳型では鋳型
反応やガス吸収によつて健全な鋳物を作ることは
困難とされている。本発明者等の経験によれば、
低炭素鋼で注湯温度1600℃の場合、ビツカース硬
さ（Hv）200以上の硬化層５の厚さＤが１mm以上
となる鋳物４の肉厚Ｔは最小約12mmであり、それ
以下では硬化層５の厚さＤが１mm以下となるの
で、一般の機械部品として使用するには不適当と
なることが多い。 However, the above mold has the following drawbacks. The hardening material layer 2 is melted by the heat of the molten metal at the time of injection, and the amount of the melted material is determined by the amount of heat of the molten metal, that is, the temperature of the molten metal and the thickness of that portion. Therefore, in a casting 4 having a thin wall thickness T, the amount of the hardened material layer 2 that is melted is small, so the thickness D of the hardened layer 5 is small. In general, when pouring temperature of low carbon steel to 1600℃ or higher, it is difficult to produce a sound casting using a normal mold due to mold reaction and gas absorption. According to the experience of the inventors,
When the pouring temperature is 1600℃ for low carbon steel, the minimum wall thickness T of the casting 4 where the thickness D of the hardened layer 5 with a Bitkers hardness (Hv) of 200 or more is 1mm or more is about 12mm, and if it is less than that, it will harden. Since the thickness D of layer 5 is 1 mm or less, it is often unsuitable for use as general mechanical parts.
本発明は、以上のような欠点を排除できる鋳込
硬化用硬化材を提供するものである。 The present invention provides a hardening material for casting hardening that can eliminate the above-mentioned drawbacks.
すなわち本発明は、前記した従来の硬化材であ
るボロンカーバイト粉末、フエノール樹脂、コロ
イダルシリカおよびアルコールに加えて、アルミ
ニウム粉末と酸化剤とを該アルミニウム粉末と酸
化剤との合量が全体量の７〜36wt％となるよう
に添加することを特徴とする鋳込硬化用硬化材に
関するものである。 That is, the present invention uses aluminum powder and an oxidizing agent in addition to the conventional hardening materials such as boron carbide powder, phenolic resin, colloidal silica, and alcohol, so that the total amount of the aluminum powder and oxidizing agent is The present invention relates to a hardening material for casting hardening, characterized in that it is added in an amount of 7 to 36 wt%.
上記酸化剤としては、二酸化マンガン、酸化第
一鉄、酸化第二鉄等の酸化鉄、硝酸ソーダ等が使
用できる。 As the oxidizing agent, iron oxides such as manganese dioxide, ferrous oxide, and ferric oxide, sodium nitrate, and the like can be used.
本発明硬化材は、この酸化剤とアルミニウム粉
末とを、従来からの硬化材成分であるボロンカー
バイト粉末、フエノール樹脂、コロイダルシリカ
およびその溶剤であるアルコールに、酸化剤とア
ルミニウム粉末との合量が硬化材全体量に占める
割合で７〜36wt％となるように、混合すればよ
い。この硬化材を例えば第１，２図に示すように
鋳型１の所望個所に塗布後、乾燥させて硬化材層
２とする。 The hardening material of the present invention combines the oxidizing agent and aluminum powder with the conventional hardening material components of boron carbide powder, phenol resin, colloidal silica, and alcohol as its solvent, and the total amount of the oxidizing agent and aluminum powder. They may be mixed in such a manner that the ratio of the hardening material to the total amount of the hardening material is 7 to 36 wt%. For example, as shown in FIGS. 1 and 2, this hardening material is applied to a desired portion of a mold 1 and then dried to form a hardening material layer 2.
本発明硬化材を使用した例えば第１，２図に示
す鋳込硬化用鋳型においても、従来の硬化材を使
用した場合と同様にして鋳造を行なうことがで
き、例えば第３図に示すような鋳物を得ることが
できる。 Casting can be carried out in the casting mold using the hardening material of the present invention as shown in FIGS. 1 and 2, for example, in the same manner as when using the conventional hardening material. You can get castings.
本発明の硬化材は、アルミニウム粉末および酸
化剤を含んでいるため、注湯後、溶湯熱の助けに
よつて発熱し、溶湯の凝固を遅らせると同時にボ
ロンカーバイトと溶湯との合金化を促進する効果
がある。従つて、従来の硬化材では困難であつた
肉厚Ｔの薄い鋳物４においても所望の硬化層５を
形成させることができる。 Since the hardening material of the present invention contains aluminum powder and an oxidizing agent, it generates heat with the help of the heat of the molten metal after pouring, delaying the solidification of the molten metal and promoting alloying of boron carbide and the molten metal. It has the effect of Therefore, it is possible to form a desired hardened layer 5 even in a casting 4 having a thin wall thickness T, which is difficult to achieve using conventional hardening materials.
本発明者等は、多数の実験の結果、アルミニウ
ム粉末と酸化剤との占める割合が7wt％以下では
発熱効果が低く従来の硬化材の場合と特に変つた
ところがなく、また36wt％以上では硬化層５の
厚さＤが薄くなると共に硬化層５の硬さも200Hv
以下となるので好ましくないことを確認してい
る。 As a result of numerous experiments, the present inventors have found that when the proportion of aluminum powder and oxidizing agent is less than 7 wt%, the heat generation effect is low and there is no difference from conventional hardening materials, and when the ratio of aluminum powder and oxidizing agent is 36 wt% or more, the hardened layer As the thickness D of 5 becomes thinner, the hardness of the hardened layer 5 also becomes 200Hv.
We have confirmed that the following is not desirable.
なお、本発明硬化材は、鉄鋼材料の鋳込硬化用
硬化材として用いられる。但し、鋳造した鋳物全
体の硬さが200Hv以上となるような材質のものに
適用することは無意味であるため、鋳物内部の硬
さが200Hv以下となるような材質、例えば普通鋳
鋼、低合金鋳鋼、さらに砂型鋳造する場合の各種
鋳鉄等への適用が望しい。製品としては堀削用カ
ツターチツプのように耐摩耗性を要するような部
品の鋳造に応用される。 The hardening material of the present invention is used as a hardening material for casting hardening of steel materials. However, since it is pointless to apply this method to materials whose hardness is 200Hv or more throughout the casting, it is meaningless to apply this method to materials whose internal hardness is 200Hv or less, such as ordinary cast steel or low alloy castings. It is desirable to apply it to cast steel and various types of cast iron when performing sand mold casting. As a product, it is applied to the casting of parts that require wear resistance, such as cutter tips for excavation.
実施例
ボロンカーバイト粉末（粒径１〜28μ）37wt
％、フエノール樹脂5.0wt％、メチルアルコール
35wt％、コロイダルシリカ2wt％、アンモニウム
粉末9wt％、酸化第二鉄12wt％の混合液を硬化材
として各種肉厚の鋳型（フラン型）内面に塗布
し、低炭素鋼の溶湯を鋳込温度1600℃で注湯し
た。Example Boron carbide powder (particle size 1-28μ) 37wt
%, phenolic resin 5.0wt%, methyl alcohol
A mixture of 35wt% colloidal silica, 2wt% ammonium powder, and 12wt% ferric oxide was applied as a hardening agent to the inner surface of various thick-walled molds (furan molds), and molten low carbon steel was poured at a casting temperature of 1600. The water was poured at ℃.
この結果、肉厚５mmの薄い鋳物においても、硬
さ200Hv以上の硬化層が厚さ1.3mmで得られた。
この鋳物の非硬化部分（母材）の硬さは140〜
160Hvであつた。 As a result, even in a thin casting with a wall thickness of 5 mm, a hardened layer with a hardness of 200 Hv or more was obtained with a thickness of 1.3 mm.
The hardness of the unhardened part (base material) of this casting is 140~
It was 160Hv.
以上のように本発明硬化材を用いた鋳込硬化用
鋳型では、薄肉鋳物でも良好な表面硬化層を得る
ことができ、各種機械部品の製造上非常に有益で
ある。 As described above, the casting mold for hardening using the hardening material of the present invention can provide a good surface hardening layer even in thin-walled castings, and is very useful for manufacturing various mechanical parts.
第１図は鋳込硬化用鋳型の縦断側面図の一例、
第２図は第１図の−線矢視断面図、第３図は
第１，２図に示す鋳型を用いて得られた鋳物の横
断平面図である。
Figure 1 is an example of a vertical side view of a casting mold for hardening.
FIG. 2 is a sectional view taken along the - line in FIG. 1, and FIG. 3 is a cross-sectional plan view of a casting obtained using the mold shown in FIGS. 1 and 2.
Claims (1)
内面の一部に付着させておく鋳込硬化用硬化材に
おいて、その配合成分がボロンカーバイト粉末、
フエノール樹脂、コロイダルシリカ、アルコー
ル、アルミニウム粉末および酸化剤を含み、該ア
ルミニウム粉末と酸化剤との合量が全体量の７〜
36wt％を占めることを特徴とする鉄鋼材料の鋳
込硬化用硬化材。1. A hardening material for casting hardening that is attached to a part of the inner surface of the mold in order to harden only the surface part of the casting, the compounded components of which are boron carbide powder,
Contains phenolic resin, colloidal silica, alcohol, aluminum powder, and an oxidizing agent, and the total amount of the aluminum powder and oxidizing agent is 7 to 7% of the total amount.
A hardening material for casting hardening of steel materials, which accounts for 36wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17577680A JPS57100838A (en) | 1980-12-15 | 1980-12-15 | Hardening material for hardening of casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17577680A JPS57100838A (en) | 1980-12-15 | 1980-12-15 | Hardening material for hardening of casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57100838A JPS57100838A (en) | 1982-06-23 |
| JPS622897B2 true JPS622897B2 (en) | 1987-01-22 |
Family
ID=16002059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17577680A Granted JPS57100838A (en) | 1980-12-15 | 1980-12-15 | Hardening material for hardening of casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57100838A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6310058A (en) * | 1986-06-30 | 1988-01-16 | Kurimoto Iron Works Ltd | Casting method |
| CN104999053B (en) * | 2015-08-04 | 2017-05-24 | 东南大学 | Ferric-oxide-containing paint used for aluminum alloy cast-infiltration, and method for manufacturing cast-infiltration coating by using same |
-
1980
- 1980-12-15 JP JP17577680A patent/JPS57100838A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57100838A (en) | 1982-06-23 |
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