JPS63103081A - Surface treatment of sintered parts - Google Patents
Surface treatment of sintered partsInfo
- Publication number
- JPS63103081A JPS63103081A JP25026586A JP25026586A JPS63103081A JP S63103081 A JPS63103081 A JP S63103081A JP 25026586 A JP25026586 A JP 25026586A JP 25026586 A JP25026586 A JP 25026586A JP S63103081 A JPS63103081 A JP S63103081A
- Authority
- JP
- Japan
- Prior art keywords
- treatment
- sintered
- parts
- sintered parts
- sintered part
- 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.)
- Granted
Links
- 238000004381 surface treatment Methods 0.000 title claims description 12
- 238000011282 treatment Methods 0.000 claims description 43
- 239000011347 resin Substances 0.000 claims description 21
- 229920005989 resin Polymers 0.000 claims description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 19
- 239000011737 fluorine Substances 0.000 claims description 14
- 229910052731 fluorine Inorganic materials 0.000 claims description 14
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 13
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000011701 zinc Substances 0.000 claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 239000004094 surface-active agent Substances 0.000 claims description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims 1
- 230000007797 corrosion Effects 0.000 description 15
- 238000005260 corrosion Methods 0.000 description 15
- 238000000576 coating method Methods 0.000 description 12
- 239000011248 coating agent Substances 0.000 description 11
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 7
- 238000012360 testing method Methods 0.000 description 6
- 235000019353 potassium silicate Nutrition 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 239000011148 porous material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 102000006395 Globulins Human genes 0.000 description 1
- 108010044091 Globulins Proteins 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 150000002221 fluorine Chemical class 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- CPSYWNLKRDURMG-UHFFFAOYSA-L hydron;manganese(2+);phosphate Chemical compound [Mn+2].OP([O-])([O-])=O CPSYWNLKRDURMG-UHFFFAOYSA-L 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000012085 test solution Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 1
- 229910000165 zinc phosphate Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
- C23C22/74—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process for obtaining burned-in conversion coatings
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Powder Metallurgy (AREA)
- Chemical Treatment Of Metals (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、自動車、家電機器、事務機、船外機、釣具等
の各種機械に利用される鉄系焼結部品の耐食性を向上さ
せるための表面処理法に関するものであり、焼結部品の
寺命を飛躍的に向上せしめ、その利用範囲を拡大せしめ
ることを目的とする。[Detailed Description of the Invention] (Field of Industrial Application) The present invention is intended to improve the corrosion resistance of iron-based sintered parts used in various machines such as automobiles, home appliances, office machines, outboard motors, and fishing gear. The purpose of this research is to dramatically improve the quality of sintered parts and expand their range of use.
（従来技術）
従来、鉄系焼結部品の耐食性向上としては、防錆油油漬
や、水蒸気処理、あるいはめっき処理が挙げられるが、
これらは短時間の防錆効果はあるものの、近年自動車部
品をはじめとして各種部品に要求される耐食性は増々厳
しくなり、従来の処理では対応できなくなってきた。(Prior art) Conventionally, methods for improving the corrosion resistance of iron-based sintered parts include immersion in anti-rust oil, steam treatment, or plating treatment.
Although these have a short-term rust prevention effect, in recent years the corrosion resistance required for various parts including automobile parts has become increasingly strict, and conventional treatments can no longer meet the requirements.
そこで出願人は既Ｋ、水蒸気処理＋グクロタイズド処理
＋樹脂又は水ガラスコーティングを組み合わせる事によ
って塩水噴霧試験で２４０ Ｈｒ以上赤錆発生なしとい
う画期的な表面処理方法を開発した。Therefore, the applicant has developed an innovative surface treatment method that does not generate red rust for more than 240 hours in a salt spray test by combining water vapor treatment + gcrotized treatment + resin or water glass coating.
（発明が解決しようとする問題点）
しかし乍ら世の中の耐食性に対する要求はさらに厳しく
なり、塩水噴霧４８０Ｈｒ赤錆発生無しというのも一般
的となっており、しかも現実の要求はもっと厳しい部品
（自動車のアンチロックブレーキシステム用センサーリ
ング等）も挙げられる。(Problem to be solved by the invention) However, the demands for corrosion resistance in the world have become even stricter, and it has become common for salt spray to last for 480 hours without causing any red rust. Sensor rings for anti-lock brake systems, etc.) are also included.
これらに対しては、従来の水蒸気処理＋グクロクイズド
＋樹脂又は水ガラスコーティングでは、表面処理が剥離
し、鉄地が露出するので使用途中で部品が欠けたりして
機能上大きな害を生じていた。For these, the conventional steam treatment + glucorized + resin or water glass coating causes the surface treatment to peel off and the iron base to be exposed, resulting in parts being chipped during use, resulting in major functional damage.
上記に鑑み本発明１ｄこの様な問題点を解消するため開
発されたものである。In view of the above, the present invention 1d was developed to solve these problems.
（問題点を解決するための手段）
即ち本発明の焼結部品の表面処理方法は、鉄系焼結部品
の表面処理において、
（イ）該焼結部品を、亜鉛、アルミニウムの１種又＆−
ｉ２種、６価Ｃｒ供給物質および該物質に対する還元剤
ならびに表面活性剤からなる混合物が液状媒体中に分数
した処理液に浸漬したのち２５０℃〜４００℃で加熱し
揮発成分を焼失せしめ焼結部品の表面π亜鉛および／′
またはアルミニウムの粒子が３価Ｃｒ重合物で囲まれた
被膜を形成させる処理いわゆるグクロクィズド処理
を少くとも施し、しかる後
（ロ）該焼結部品の表層部に弗素系樹脂の皮膜を形成さ
せる処理
を施すことを特徴とするものである。(Means for Solving the Problems) That is, the method for surface treatment of sintered parts of the present invention, in the surface treatment of iron-based sintered parts, (a) treats the sintered parts with one of zinc, aluminum, and −
A sintered part is produced by immersing a mixture of type i, hexavalent Cr supply material, a reducing agent for the material, and a surfactant in a treatment solution in a liquid medium, and then heating the mixture at 250°C to 400°C to burn off the volatile components. surface πzinc and /′
Alternatively, at least a process of forming a film in which aluminum particles are surrounded by a trivalent Cr polymer, a so-called gloquid process, is performed, and then (b) a process of forming a film of a fluorine-based resin on the surface layer of the sintered part is performed. It is characterized by the fact that
以下に詳細に本発明を説明する。The present invention will be explained in detail below.
従来の、前記出願人の開発した表面処理の考え方は、水
蒸気処理で素材を封孔して、ダクロクイズド処理を行い
、ダクロ処理の製法上残存する気孔をさらに水ガラス又
は樹脂でコーティングするというものであったが、さら
に発展させコーティングするものも非常に耐食性に優れ
たものを使用すれば全体での耐食性はさらに一段と高ま
る。The conventional concept of the surface treatment developed by the applicant is to seal the pores of the material with water vapor treatment, perform Dacroquizide treatment, and then coat the pores that remain due to the Dacro treatment manufacturing method with water glass or resin. However, if we develop this further and use coatings with extremely high corrosion resistance, the overall corrosion resistance will further increase.
耐食性に優れた樹脂としては弗素系樹脂例えば四弗化エ
チレン樹脂等があげられる。Examples of resins with excellent corrosion resistance include fluorine-based resins such as tetrafluoroethylene resins.
第１図πその模式図を示す。図中、（１）は焼結鉄、（
２）は水蒸気処理膜（Ｆｅ５０４ ）、（３）は気孔、
（４）Ｉ／ｉグクロ皮膜、（５）はＣｒ重合体、（６）
はＺｎ片、（力は空孔、（８）は弗素系樹脂膜である。Figure 1 shows a schematic diagram of π. In the figure, (1) is sintered iron, (
2) is a steam treated membrane (Fe504), (3) is a pore,
(4) I/i globulin film, (5) Cr polymer, (6)
is a Zn piece, (force is a hole, and (8) is a fluorine-based resin film.
（作用）
まず鉄系焼結材に弗素系樹脂をコーティングして塩水噴
霧試験を施すと第１表に示す様に斑点状に赤錆が発錆し
てしまう。(Function) First, when an iron-based sintered material is coated with a fluorine-based resin and subjected to a salt spray test, red rust appears in spots as shown in Table 1.
第 １ 表
しかし、素材にダクロクィズド処理を施しく前処理とし
て該焼結部品を水！気と水素を含む雰囲気中で高温で処
理して該焼結部品の表面ＶＣ緻密なをコーティングする
と、著しく耐食性が上昇する。Table 1 However, if the material is subjected to Dacroquizd treatment, the sintered parts will be water-treated as a pre-treatment! If the surface of the sintered part is coated with a dense VC layer by treatment at high temperature in an atmosphere containing air and hydrogen, the corrosion resistance will be significantly increased.
これは、弗素系樹脂コーティングが３００〜４００℃と
高温で処理するため通常の焼結材では内部の空孔中のガ
スがコーテイング膜を破って外に出るため、せっかくの
処理膜にブローホールが形成され望む耐食性が得られな
いのに対して、グクロ処理るるいは水蒸気処理十グクロ
処理を施すと、内部のガスがこの処理の時に外Ｋｌ：１
ｌｌＩてしまい、弗素系樹脂コーディングを欠陥なく形
成させる事が可能となる。This is because the fluorine-based resin coating is processed at a high temperature of 300 to 400°C, so in normal sintered materials, the gas in the internal pores breaks through the coating film and escapes, causing blowholes to form in the treated film. On the other hand, when Gukuro treatment or steam treatment is applied, the internal gas is removed from the outside Kl: 1 during this treatment.
This makes it possible to form a fluorine-based resin coating without defects.
又この前処理としては例えば樹脂含浸であると弗素系樹
脂の処理温度（３００〜４００℃）に耐えれないし、又
一般的に弗素系樹脂の前処理として燐酸マンガンあるい
は燐酸亜鉛処理もせいぜい２００℃で分解するので、こ
れらは弗素系樹脂が被処理面にのりやすくするだけで耐
食性には寄与しない。In addition, if this pretreatment is, for example, resin impregnation, it cannot withstand the processing temperature (300 to 400°C) of fluorine-based resins, and generally, manganese phosphate or zinc phosphate treatment as a pretreatment for fluorine-based resins is performed at a temperature of at most 200°C. Since they decompose, they only make it easier for the fluorine-based resin to adhere to the surface to be treated, but do not contribute to corrosion resistance.
ところがグクロタイズド処理は、これも３５０℃程度で
処理するので、弗素系樹脂の処理を施してもさ程耐食性
が低下しない。However, since the gcrotized treatment is also carried out at a temperature of about 350°C, the corrosion resistance does not deteriorate significantly even if the fluorine-based resin treatment is applied.
よってこれらを組み合わせる事により従来の一般的な水
蒸気処理＋グクロタイズド処理＋樹脂又は水ガラスのコ
ーティングよりもはるかに耐食性は向上する。Therefore, by combining these, the corrosion resistance is much improved compared to the conventional general steam treatment + gcrotized treatment + resin or water glass coating.
又、この弗素系樹脂コーティングの場合はグクロ処理の
前処理としての水蒸気処理は、さ程大きな影響はない。In addition, in the case of this fluorine-based resin coating, the steam treatment as a pretreatment for the glue treatment does not have much of an effect.
（実施例） 以下に本発明・の実施例を述べる。(Example) Examples of the present invention will be described below.
主としてＦｅから成る焼結鉄（ギヤー形状のもの）に次
のＮｏ、 １ 、 Ｎ１２．１ＶｋＬ３のケースの表面
処理を行った。Sintered iron (gear-shaped) mainly composed of Fe was subjected to the following surface treatments for No. 1, N12.1VkL3 cases.
ケース隘１：水蒸気処理＋グクロクイズド処理＋水ガラ
スコーティング＋ワック
スコーティング
クースＮｏ、２：水蒸気処理十ダクロクイズド処理十弗
素系樹脂コーティング
ブース阻３：グクロクイズド処理十弗素系樹脂コーティ
ング
を施してキャス溶液のどぶ漬けによる耐食性試験を行っ
た。Case No. 1: Steam treatment + Gukuroquizide treatment + water glass coating + wax coating Case No. 2: Steam treatment 10 Dakroquid treatment 10 Fluorine-based resin coating booth No. 3: Gukuro-Quizid treatment 10 Fluorine-based resin coating and soaking in Cath solution A corrosion resistance test was conducted using
この評価方法けＪＩＳ Ｚ ２３７１の塩水噴霧試験よ
りも厳しいキャス試験ＪＩＳ Ｈ８６８１をさらに進め
てキャス試験溶液のとぶ漬けで評価した。In this evaluation method, the Cath test JIS H8681, which is stricter than the salt spray test of JIS Z 2371, was further advanced and evaluated by soaking in a Cath test solution.
ちなみにケース隘１の処理は通常の塩水噴霧試験では４
８０Ｈｒｌ’ｊ十分に赤錆発生しない程度である。By the way, the treatment for case 1 was 4 in the normal salt spray test.
80Hrl'j is sufficient to prevent red rust from occurring.
結果は第１表で明らかな様に、ケース南１の処理ではす
でに７２Ｈｒ後には皮膜が剥離し、２４０ Ｈｒ後には
完全に剥離し、ギヤーの歯先か欠けている程腐食してい
るにもかかわらず、ケースＮｏ、 ２、陽３では７２
Ｈｒでは若干赤錆が認められる程度で、２４０ Ｈｒ後
でも皮膜の剥離はわずかでるり、非常に高い耐食性を示
している。As the results are clear in Table 1, in case South 1 treatment, the film already peeled off after 72 hours, and completely peeled off after 240 hours, even though the gear teeth were corroded to the point where they were chipped. Regardless, case No. 2, positive 3 is 72
After 240 hours, only slight red rust was observed, and even after 240 hours, there was only slight peeling of the film, indicating very high corrosion resistance.
しかもケースＩＩｋ１２と阻３では大差なく、グクロ処
理前の水蒸気処理については施しても施さなくてもよく
、ケースＮ１１の処理に比べて工程数が大中ば減少でき
るのでトータルコストも低減される。Furthermore, there is no big difference between Cases IIk12 and 3, and there is no need to perform the steam treatment before the Gokuro treatment, and the number of steps can be reduced to a large or medium degree compared to the treatment in Case N11, so the total cost is also reduced.
（発明の効果）
本発明により、従来の鉄系焼結材では考えられなかった
様な耐食性を得る事ができた。これにより例えば自動車
のこまわりの部品（アンチロックブレーキシステム用の
センサーリング等）の様に非常に耐食性を要求される所
を焼結により作製する事が可能となり、部品のコスト低
減により上記システム等の普及に貢献できる。又、この
処理により、焼結部品の適用範囲を著しく拡大させる。(Effects of the Invention) According to the present invention, it was possible to obtain corrosion resistance that was unimaginable with conventional iron-based sintered materials. This makes it possible to use sintering to manufacture parts that require extremely high corrosion resistance, such as parts around automobiles (sensor rings for anti-lock brake systems, etc.). It can contribute to its spread. This treatment also significantly expands the range of applications of sintered parts.
第１図は本発明の表面処理を行った焼結部品の模式図を
例示している。FIG. 1 illustrates a schematic diagram of a sintered part subjected to the surface treatment of the present invention.
Claims (3)
種、６価Ｃｒ供給物質および該物質に対する還元剤なら
びに表面活性剤からなる混合物が液状媒体中に分散した
処理液に浸漬したのち２５０℃〜４００℃で加熱し揮発
成分を焼失せしめ焼結部品の表面に亜鉛および／または
アルミニウムの粒子が３価Ｃｒ重合物で囲まれた被膜を
形成させる処理（以後（イ）の処理と略記） を少くとも施し、しかる後 （ロ）該焼結部品の表層部に弗素系樹脂の皮膜を形成さ
せる処理（以後（ロ）の処理と略記）を施すことを特徴
とする焼結部品の表面処理方法。(1) In the surface treatment of iron-based sintered parts, (a) The sintered parts are treated with one or two types of zinc or aluminum.
The sintered parts are immersed in a treatment solution in which a mixture consisting of a seed, a hexavalent Cr supply material, a reducing agent for the material, and a surfactant are dispersed in a liquid medium, and then heated at 250°C to 400°C to burn off volatile components. At least a treatment (hereinafter abbreviated as (a) treatment) is performed to form a film in which zinc and/or aluminum particles are surrounded by a trivalent Cr polymer on the surface, and then (b) the surface layer of the sintered part is 1. A method for surface treatment of sintered parts, which comprises performing a treatment (hereinafter abbreviated as (b) treatment) to form a fluorine-based resin film on the surface of the sintered part.
高温で処理して該焼結部品の表面に緻密な酸化鉄被膜を
形成せしめ表面層を封孔する処理を施し、次いで（イ）
の処理を施し、最後に（ロ）の処理を施す特許請求の範
囲第（１）項記載の焼結部品の表面処理方法。(2) First, the sintered part is treated at high temperature in an atmosphere containing water vapor and hydrogen to form a dense iron oxide film on the surface of the sintered part and seal the surface layer, and then (I) )
A method for surface treatment of a sintered part according to claim 1, wherein the treatment described in (1) is carried out, and finally the treatment (b) is carried out.
施す、（イ）及び（ロ）の２つだけの処理を施す特許請
求の範囲第（１）項記載の焼結部品の表面処理方法。(3) The sintered component according to claim (1), in which only the two treatments (a) and (b) are applied, in which the treatment in (a) is first performed, and then the treatment in (b) is applied. surface treatment method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61250265A JPH0765182B2 (en) | 1986-10-20 | 1986-10-20 | Surface treatment method for sintered parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61250265A JPH0765182B2 (en) | 1986-10-20 | 1986-10-20 | Surface treatment method for sintered parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63103081A true JPS63103081A (en) | 1988-05-07 |
| JPH0765182B2 JPH0765182B2 (en) | 1995-07-12 |
Family
ID=17205317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61250265A Expired - Lifetime JPH0765182B2 (en) | 1986-10-20 | 1986-10-20 | Surface treatment method for sintered parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0765182B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995019454A1 (en) * | 1994-01-17 | 1995-07-20 | Honda Giken Kogyo Kabushiki Kaisha | Method for recycling aluminum alloy product scraps for automobile |
| US6190464B1 (en) * | 1998-09-24 | 2001-02-20 | Nisshin Steel Co., Ltd. | Chromating solution and chromated metal sheet |
| JP2009074114A (en) * | 2007-09-19 | 2009-04-09 | Hitachi Powdered Metals Co Ltd | Iron-based sintered material superior in corrosion resistance, fixing case for cylinder lock device made from the material, and method for manufacturing them |
| JP2021066945A (en) * | 2019-10-28 | 2021-04-30 | 株式会社クボタ | Engine exterior part, and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4871431A (en) * | 1971-12-28 | 1973-09-27 | ||
| JPS52904A (en) * | 1975-06-24 | 1977-01-06 | Nichigou Asechiren Kk | Process for recovering activity of washing liquid for acetylene gas purification |
-
1986
- 1986-10-20 JP JP61250265A patent/JPH0765182B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4871431A (en) * | 1971-12-28 | 1973-09-27 | ||
| JPS52904A (en) * | 1975-06-24 | 1977-01-06 | Nichigou Asechiren Kk | Process for recovering activity of washing liquid for acetylene gas purification |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995019454A1 (en) * | 1994-01-17 | 1995-07-20 | Honda Giken Kogyo Kabushiki Kaisha | Method for recycling aluminum alloy product scraps for automobile |
| US6190464B1 (en) * | 1998-09-24 | 2001-02-20 | Nisshin Steel Co., Ltd. | Chromating solution and chromated metal sheet |
| US6329067B2 (en) | 1998-09-24 | 2001-12-11 | Nisshin Steel Co., Ltd. | Chromating solution and chromated metal sheet |
| JP2009074114A (en) * | 2007-09-19 | 2009-04-09 | Hitachi Powdered Metals Co Ltd | Iron-based sintered material superior in corrosion resistance, fixing case for cylinder lock device made from the material, and method for manufacturing them |
| JP2021066945A (en) * | 2019-10-28 | 2021-04-30 | 株式会社クボタ | Engine exterior part, and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0765182B2 (en) | 1995-07-12 |
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