JPH11286620A - Cementation-proofing coating material - Google Patents
Cementation-proofing coating materialInfo
- Publication number
- JPH11286620A JPH11286620A JP12942898A JP12942898A JPH11286620A JP H11286620 A JPH11286620 A JP H11286620A JP 12942898 A JP12942898 A JP 12942898A JP 12942898 A JP12942898 A JP 12942898A JP H11286620 A JPH11286620 A JP H11286620A
- Authority
- JP
- Japan
- Prior art keywords
- water glass
- cementation
- sio
- coating material
- water
- 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
- 239000011248 coating agent Substances 0.000 title abstract description 8
- 238000000576 coating method Methods 0.000 title abstract description 8
- 239000000463 material Substances 0.000 title abstract description 6
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 25
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 25
- 150000001447 alkali salts Chemical class 0.000 claims abstract description 4
- 239000003973 paint Substances 0.000 claims description 16
- 238000005255 carburizing Methods 0.000 claims description 6
- IJKVHSBPTUYDLN-UHFFFAOYSA-N dihydroxy(oxo)silane Chemical compound O[Si](O)=O IJKVHSBPTUYDLN-UHFFFAOYSA-N 0.000 claims description 2
- 230000003449 preventive effect Effects 0.000 claims description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 230000008020 evaporation Effects 0.000 abstract 1
- 238000001704 evaporation Methods 0.000 abstract 1
- 239000000758 substrate Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 229910004283 SiO 4 Inorganic materials 0.000 description 7
- 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
- 229910000760 Hardened steel Inorganic materials 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 229910052810 boron oxide Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は肌焼鋼を浸炭処理する際
に、一部分を浸炭防止（防炭）する場合に使用する塗料
に関するものである。以下ｍａｓｓ％はすべて％のみで
示す。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paint used to prevent carburization (carburization) of a part of carburized steel when carburizing. Hereinafter, all “mass%” are indicated only by “%”.
【０００２】[0002]
【従来の技術】今日、浸炭防止塗料としては酸化硼素粉
末とアクリル樹脂などの展着剤を含む炭化水素系のも
の、および硅砂、ベントナイト、銅粉末を含む水ガラス
系のものが使用されている。2. Description of the Related Art At present, hydrocarbon-based paints containing a spreading agent such as boron oxide powder and acrylic resin, and water-glass-based paints containing silica sand, bentonite and copper powder are used as anti-carburizing paints. .
【０００３】[0003]
【発明が解決しようとする課題】本発明の塗料は後者の
水ガラス系の塗料に類するものであるが、これまで市販
されている塗料は防炭性が悪く、通常２回重ね塗りして
使用されている。本発明の塗料は１回塗りで防炭性を充
分発揮するものである。The paint of the present invention is similar to the latter water glass paint, but the paints which have been marketed so far have poor carbon-proof properties and are usually used after being applied twice. Have been. The coating composition of the present invention exhibits sufficient carbon-proofing properties in a single application.
【０００４】[0004]
【課題を解決するための手段】浸炭防止塗料は９２０〜
９６０℃で数時間から数十時間加熱される。この際、塗
膜は一酸化炭素の侵入を防止せねばならない。本発明で
はメタ硅酸のアルカリ塩（Ｎａ２ＳｉＯ３、Ｋ２ＳｉＯ
３など）あるいはオルソ硅酸のアルカリ塩（Ｎａ４Ｓｉ
Ｏ４、Ｋ４ＳｉＯ４など）と展着剤の水ガラスの比をい
ろいろ変えた塗料を作成した。Means for Solving the Problems Carburizing preventive paint is 920 to 920.
Heat at 960 ° C. for several hours to tens of hours. At this time, the coating must prevent carbon monoxide from entering. In the present invention, alkali salts of metasilicic acid (Na 2 SiO 3 , K 2 SiO
3 ) or an alkali salt of orthosilicate (Na 4 Si
O 4 , K 4 SiO 4, etc.) and water glass as a spreading agent were prepared in various ratios.
【０００５】本発明の塗料を肌焼鋼に塗布すると水分が
散逸し、十数分から三十数分すると固化し、これを浸炭
炉に入れ９００℃以上に昇温すると、塗膜はガラス化
し、ガスの侵入を防止する。When the paint of the present invention is applied to case-hardened steel, moisture is dissipated, and solidifies in more than ten to thirty minutes. When this is put into a carburizing furnace and heated to 900 ° C. or more, the coating film becomes vitrified. Prevent gas intrusion.
【０００６】展着剤の水ガラスは１号水ガラス、２号水
ガラスおよび３号水ガラスが市販されているが、１号お
よび２号水ガラスは乾燥速度が遅いので、本発明では３
号水ガラスを用いた。次に調合の実施例の一部を示す。As the water glass for the spreading agent, No. 1 water glass, No. 2 water glass and No. 3 water glass are commercially available. However, No. 1 and No. 2 water glass have a low drying speed, and therefore, in the present invention, No. 3 water glass is used.
No. water glass was used. Next, a part of the formulation examples will be described.
【０００７】[0007]
Ａ． ５％ Ｎａ２ＳｉＯ３――９５％３号水ガラス Ｂ．２５％ Ｎａ２ＳｉＯ３――７５％３号水ガラス Ｃ．４０％ Ｎａ２ＳｉＯ３――６０％３号水ガラス Ｄ． ５％ Ｋ２ＳｉＯ３ ――９５％３号水ガラス Ｅ．２５％ Ｋ２ＳｉＯ３ ――７５％３号水ガラス Ｆ．４０％ Ｋ２ＳｉＯ３ ――６０％３号水ガラス Ｇ． ５％ Ｎａ４ＳｉＯ４――９５％３号水ガラス Ｈ．２５％ Ｎａ４ＳｉＯ４――７５％３号水ガラス Ｉ．４０％ Ｎａ４ＳｉＯ４――６０％３号水ガラス Ｊ． ５％ Ｋ４ＳｉＯ４ ――９５％３号水ガラス Ｋ．２５％ Ｋ４ＳｉＯ４ ――７５％３号水ガラス Ｌ．４０％ Ｋ４ＳｉＯ４ ――６０％３号水ガラス 以上Ａ〜Ｌの１２種類の塗料を作成し、肌焼鋼（ＪＩ
Ｓ：ＳＣＭ４１５）に約０．２ｍｍ厚みに１回塗布し
た。自然乾燥後、各々浸炭炉に入れ、９５０℃で８時間
浸炭し、８００℃で油焼入れを行った。A. 5% Na 2 SiO 3 --95% No. 3 water glass B. 25% Na 2 SiO 3 -75% No. 3 water glass C.I. D. 40% Na 2 SiO 3 --60% No. 3 water glass 5% K 2 SiO 3 --95% No. 3 water glass 25% K 2 SiO 3 --75% No. 3 water glass 40% K 2 SiO 3 --60% No. 3 water glass 5% Na 4 SiO 4 --95% No. 3 water glass 25% Na 4 SiO 4 --75% No. 3 water glass 40% Na 4 SiO 4 --60% No. 3 water glass 5% K 4 SiO 4 --95% No. 3 water glass 25% K 4 SiO 4 --75% No. 3 water glass L. 40% K 4 SiO 4 --60% of No. 3 water glass or A~L create 12 different paints, hardened steel (JI
S: SCM415) once to a thickness of about 0.2 mm. After natural drying, each was put into a carburizing furnace, carburized at 950 ° C. for 8 hours, and oil-quenched at 800 ° C.
【０００８】次に浸炭部および塗料を塗布した箇所の防
炭部の硬度を測定すると、表１に示すように浸炭部はＨ
ｖ７３０以上となり、防炭部はＨｖ３５０以下と何れも
熱処理前の素材の硬度と殆ど変らず、防炭能の優れてい
ることが判明した。尚、Ｎａ２ＳｉＯ３やＮａ４ＳｉＯ
４などの添加量が５％以下のものは、何れも防炭能が悪
く、一方４０％以上のものは流動性が悪く塗料化できな
いことも判明した。従って、本発明の特許請求の範囲を
５〜４０％とした。Next, when the hardness of the carburized portion and the hardness of the carburized portion at the portion where the paint was applied were measured, as shown in Table 1, the carburized portion was H
v730 or more, the hardness of the carbon-proof portion was Hv350 or less, which was almost the same as the hardness of the material before the heat treatment, and it was found that the carbon-proof portion had excellent carbon-proofing ability. In addition, Na 2 SiO 3 or Na 4 SiO
It was also found that those having an addition amount of 5% or less, such as 4, had poor carbon-proofing ability, while those having an addition amount of 40% or more had poor fluidity and could not be formed into a paint. Therefore, the scope of the claims of the present invention is set to 5 to 40%.
【０００９】[0009]
【表１】 [Table 1]
【００１０】[0010]
【発明の効果】これまで市販されている水ガラス系の防
炭塗料は、すべて２回重ね塗りをし、塗膜厚みを約０．
４ｍｍ以上にする必要があったが、本発明の塗料は１回
塗りで、その塗膜厚みが約０．２ｍｍで充分防炭能を発
揮することが判明した。従って、塗料および工賃が半分
になるものでその経済効果が大きい。As described above, the water-glass based carbon-preventive paints which have been commercially available are all coated twice, and the thickness of the paint film is reduced to about 0.5.
Although it was necessary to make the thickness 4 mm or more, it was found that the coating of the present invention was applied once, and the coating thickness was about 0.2 mm to sufficiently exhibit the carbon-proofing ability. Therefore, the paint and labor are halved, and the economic effect is large.
Claims (1)
塩を５〜４０ｍａｓｓ％、水ガラスに添加することを特
徴とする浸炭防止塗料。1. A carburizing preventive paint comprising adding an alkali salt of metasilicic acid or orthosilicic acid to water glass in an amount of 5 to 40 mass%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12942898A JPH11286620A (en) | 1998-04-02 | 1998-04-02 | Cementation-proofing coating material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12942898A JPH11286620A (en) | 1998-04-02 | 1998-04-02 | Cementation-proofing coating material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11286620A true JPH11286620A (en) | 1999-10-19 |
Family
ID=15009257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12942898A Pending JPH11286620A (en) | 1998-04-02 | 1998-04-02 | Cementation-proofing coating material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11286620A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6964712B2 (en) * | 2000-08-07 | 2005-11-15 | Durferrit Gmbh | Hardening protection compositions for partial carburization of metallic components |
-
1998
- 1998-04-02 JP JP12942898A patent/JPH11286620A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6964712B2 (en) * | 2000-08-07 | 2005-11-15 | Durferrit Gmbh | Hardening protection compositions for partial carburization of metallic components |
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