JPS6050870B2 - Link chain manufacturing method - Google Patents
Link chain manufacturing methodInfo
- Publication number
- JPS6050870B2 JPS6050870B2 JP1832479A JP1832479A JPS6050870B2 JP S6050870 B2 JPS6050870 B2 JP S6050870B2 JP 1832479 A JP1832479 A JP 1832479A JP 1832479 A JP1832479 A JP 1832479A JP S6050870 B2 JPS6050870 B2 JP S6050870B2
- Authority
- JP
- Japan
- Prior art keywords
- link chain
- link
- corrosion resistance
- strength
- chain
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0087—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for chains, for chain links
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
-
- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Coating With Molten Metal (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Heat Treatment Of Articles (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は荷投機器としてのモートルブロツク及びチェ
ーンブロックに係り、特に高強度高靭性耐食性を有する
リンクチェーンの製造法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a motor block and a chain block as loading equipment, and particularly to a method for manufacturing a link chain having high strength, high toughness, and corrosion resistance.
〔発明の背景〕 モートルブロツクあるいはチェーンブ
ロックは揚重機として使用される。BACKGROUND OF THE INVENTION Motor blocks or chain blocks are used as lifting equipment.
これらに使用されるリンクチェーンには荷物の吊り下げ
、吊り下げにおいて直接荷重が付加される。また異常な
荷吊りに より、著しい応力が負荷されることもある。
このようなことから、リンクチェーンは高強度を有する
こと、また荷物の吊り上げ、吊り下げによるリンクチェ
ーンの接触部の摩耗に耐えうるように耐摩耗性に優れて
いなければならない。更に安全性から高靭性であること
も要求される。加えて近年食品、医療及び漁業関係にお
いては、上述の性質のみならず耐食性に優れたリンクチ
ェーンを要望してきている。耐食リンクチェーンとして
は、従来からステンレス鋼あるいは各種のメッキ処理を
施したものが用いられている。しかし、これらの方法で
作られたものではリンクチェーンとして要求される性能
が十分得られないという欠点がある。・〔発明の目的〕
本発明の目的は、上述の欠点を無くした強靭で耐摩耗
性及び耐食性に優れたリンクチェーンの製造方法を提供
するにある。Loads are directly applied to the link chains used for these during the suspension and suspension of cargo. Significant stress may also be applied due to abnormal load lifting.
For this reason, the link chain must have high strength and excellent wear resistance so that the contact portion of the link chain can withstand wear caused by lifting and suspending loads. Furthermore, high toughness is also required from the viewpoint of safety. In addition, in recent years, in the food, medical, and fisheries fields, there has been a demand for link chains that not only have the above-mentioned properties but also have excellent corrosion resistance. Corrosion-resistant link chains have conventionally been made of stainless steel or those coated with various plating treatments. However, products made using these methods have the disadvantage that they do not provide sufficient performance required for link chains. - [Object of the Invention] An object of the present invention is to provide a method for manufacturing a link chain that is strong, has excellent wear resistance, and corrosion resistance, and eliminates the above-mentioned drawbacks.
〔発明の概要〕
本発明者らは、高強度で耐摩耗性かつ耐食性を有するリ
ンクチェーンを開発すべく種々研究した結果、以下に示
すような成分組成のリンクチェーン材並びにめつき液と
製造工程において達成することができた。[Summary of the Invention] As a result of various studies aimed at developing a link chain with high strength, wear resistance, and corrosion resistance, the present inventors have developed a link chain material having the composition shown below, a plating solution, and a manufacturing process. was able to be achieved.
本発明は、焼入れ硬化する材料として鉄鋼系からなるリ
ンクチェーンに侵炭、窒化、浸炭窒化のいずれかの処理
を施した後、Ｐｂを含有するＳｎ合金の溶融液中に直接
挿入焼入冷却し、次いで浴中より引き上げることによつ
てリンクチェーン表面にＳｎ−Ｐｂ合金の薄層を形成さ
せるものてある。これによつて、強靭で耐食性を有する
リンクチェーンが得られる。ここでＳｎ−Ｐｂ合金は、
重量でＳｎ５６〜７８％とＰｂ２２〜４４％よりなる。
この成分組成において２５０゜Ｃ以下の溶融液が得られ
、この組成の溶融液によつて焼入冷却効果及びリンクチ
ェーンとしての所定の強度が得られる。リンクチェーン
の素材は重量でＣＯ．ｌ〜０．４％、Ｓｉｌ％以下、Ｍ
ｎ３％以下、ＭＯＯ．ｌ〜１％、残部Ｆｅからなる鉄系
合金である。Ｓｎ−Ｐｂ合金を上記組成範囲としたのは
、第１にこれら元素を上記組成範囲で混合させることに
より、融点を約１９０℃まで低下させることができ、窒
化、浸炭、浸炭窒化温度及び通常の焼入温度から、直接
挿入冷却することによつて、冷却された処理物の焼入効
果が十分得られることにある。第２に本発明の溶融液中
に挿入することによつて、溶融液の薄層が処理物に付着
され、これが耐食性を著しく高める効果があることてあ
る。リンクチェーン材料の成分組成の限定理由は、下記
の通りである。Ｃは材料強度を向上させるう一えで必要
であるが、少ないと焼人不足により強度改善の効果が乏
しく、多いと材質と脆くし且つ溶接性を悪くする。０．
１〜０．４％が適当な範囲である。In the present invention, a link chain made of steel as a material to be quenched and hardened is subjected to carburizing, nitriding, or carbonitriding, and then directly inserted into a molten Sn alloy containing Pb to be quenched and cooled. The link chain is then lifted out of the bath to form a thin layer of Sn--Pb alloy on the surface of the link chain. This results in a link chain that is strong and corrosion resistant. Here, the Sn-Pb alloy is
It consists of 56-78% Sn and 22-44% Pb by weight.
With this component composition, a melt having a temperature of 250° C. or less can be obtained, and the melt with this composition provides a quenching cooling effect and a predetermined strength as a link chain. The link chain material has a weight of CO. l~0.4%, Sil% or less, M
n3% or less, MOO. It is an iron-based alloy consisting of 1% to 1% Fe, the balance being Fe. The reason why the Sn-Pb alloy is made into the above composition range is that, firstly, by mixing these elements in the above composition range, the melting point can be lowered to about 190°C, and the nitriding, carburizing, carbonitriding temperature and normal By direct insertion cooling from the quenching temperature, a sufficient quenching effect can be obtained for the cooled object. Secondly, by insertion into the melt of the present invention, a thin layer of the melt is deposited on the workpiece, which has the effect of significantly increasing corrosion resistance. The reason for limiting the component composition of the link chain material is as follows. C is necessary to improve the strength of the material, but if it is too little, the effect of improving the strength will be poor due to the lack of heat, and if it is too much, it will make the material brittle and have poor weldability. 0.
A suitable range is 1 to 0.4%.
ＳｉおよびＭｎは脱酸剤として含有する。１％をこえる
Ｓｉの含有はかえつて靭性を悪くする。Si and Mn are contained as deoxidizing agents. Containing more than 1% of Si actually worsens the toughness.
５甜は焼入性をよくするので３％まで有効である。5. Sugar improves hardenability and is effective up to 3%.
ＭＯは浸炭或は窒化層の靭性と衝撃疲れ性を改善するた
めに含有する。０．１％より少ないとこれらの効果が乏
しく、１％をこえても大幅な改善は望めない。MO is included to improve the toughness and impact fatigue properties of the carburized or nitrided layer. If it is less than 0.1%, these effects will be poor, and if it exceeds 1%, no significant improvement can be expected.
重量で、Ｃ；０．２２％、Ｓｉ：０．２５％、Ｍｎ；１
．４０％、ＭＯ；０．３５％、Ｐ；０．０１３％、Ｓ；
０．０１２％、残Ｆｅからなる合金で作られた線径７．
１ｗｎφのリンクチェーンについて、次の処理を施した
。By weight, C: 0.22%, Si: 0.25%, Mn: 1
．． 40%, MO; 0.35%, P; 0.013%, S;
Wire diameter 7. Made of an alloy consisting of 0.012% and balance Fe.
The following processing was performed on a link chain of 1wnφ.
本発明法、すなわち、ＮＯ．ｌはリンクチェーンを８７
０℃×２紛浸炭後、浸炭雰囲気中に保持されたＳｎ；７
０％、Ｐｂ；３０％からなる組成の２１０℃溶融液中に
挿入冷却し１吟間保持したものである。またＮＯ．２は
従来より行われている８７０℃て２０分加熱の浸炭処理
後油冷却し、２００℃焼もどし処理したものである。Ｎ
Ｏ．３はＮＯ．２の方法により処理したものを、Ｓ橢融
メッキしたものてある。ＮＯ．４はＳＵＳ３Ｏ４でノ作
られたものである。これらについて各種の試験を行つた
。第１図は上記４種類の処理を施した７．１Ｔｗｔφリ
ンクチェーンの引張強度を示したものである。The method of the present invention, namely NO. l is link chain 87
Sn held in carburizing atmosphere after 0°C x 2 powder carburizing; 7
The sample was cooled by being inserted into a 210° C. melt having a composition of 0% Pb and 30% Pb, and held for 1 minute. Also NO. No. 2 is a product which was conventionally carburized at 870°C for 20 minutes, cooled with oil, and tempered at 200°C. N
O. 3 is NO. The material treated by method 2 is S-plated. No. 4 is made of SUS3O4. Various tests were conducted on these. FIG. 1 shows the tensile strength of a 7.1Twtφ link chain subjected to the above four types of treatments.
これより明らかなように本発明の方法によつて作ら・れ
たＮＯ．ｌのものは、ＮＯ．２の従来品の耐食性を有し
ないものと強度及び靭性ともに同じ値を示し、耐食性を
有するＮＯ．３のＳｎ溶融メッキ及びＮＯ．４のＳＵＳ
３Ｏ４ステンレス鋼のものより強度的に優れていること
がわかる。リンクチェーンの引張強度は、クレーン規格
により定格荷重の５倍以上と定められている。直径７．
１７０７７！φリンクチェーンは、定格荷重１トン用に
用いられるが、本発明のリンクチェーンはクレーン規格
に定められた引張強度にさらに２０％の安全率をかけた
値すなわら６トン以上をも十分満足することがわかる。
第２図は上記４種類のリンクチェーンの片振り疲れ試験
結果を示したものである。As is clear from this, NO. 1 is NO. It showed the same strength and toughness values as the conventional product No. 2 without corrosion resistance, and had corrosion resistance. No. 3 Sn hot-dip plating and NO. 4 SUS
It can be seen that the strength is superior to that of 3O4 stainless steel. The tensile strength of the link chain is determined by crane standards to be at least five times the rated load. Diameter 7.
17077! The φ link chain is used for a rated load of 1 ton, but the link chain of the present invention sufficiently satisfies the tensile strength stipulated in the crane standard multiplied by an additional 20% safety factor, which is 6 tons or more. I understand that.
FIG. 2 shows the results of the oscillation fatigue test for the four types of link chains mentioned above.
本発明品ＮＯ．ｌは、ＮＯ．３のＳ補融メッキ及びＮＯ
．４のＳＵＳ３Ｏ４ステンレス鋼で作られたものよりも
優れ、従来品の表面処理していないものと同程度であつ
た。第３図は同じく上記４種類のリンクチェーンを用い
定格荷重１トンのモートルプロツクの実機によつてリン
クチェーンの摩耗試験を行つたものである。Invention product NO. l is NO. 3 S auxiliary plating and NO
．． It was superior to the one made of No. 4 SUS3O4 stainless steel, and was comparable to the conventional product without surface treatment. FIG. 3 shows a link chain wear test using the four types of link chains mentioned above using an actual motor block with a rated load of 1 ton.
試験条件は無潤滑状態で荷重１トンを吊り下げて動作さ
せたものである。この結果は第２図の疲れ試験結果と同
じくＮＯ．ｌの本発明品は、耐食性を有する試料ＮＯ．
３及びＮＯ．４より優れ、従来品ＮＯ．２と同程度の耐
摩耗性を有することがわかつた。次に耐食性試験として
屋外に放置する試験を行つた結果、ＮＯ．２の従来品は
約３日経過後より赤錆を発生し、１０日以上過ぎるとほ
ぼ全面に赤錆を発生するが、ＮＯ．ｌの本発明品、ＮＯ
．３のＳｎ溶融メッキ及びＮＯ．４のＳＵＳ３Ｏ４は１
００日以上でも赤錆の発生はまつたく見られなかつた。
表は各種の性能試験結果について総合評価したものであ
る。The test conditions were to suspend a load of 1 ton and operate without lubrication. This result is the same as the fatigue test result shown in Figure 2. The inventive product No. 1 has corrosion resistance.
3 and NO. Better than 4, conventional product NO. It was found that it had wear resistance comparable to No. 2. Next, as a corrosion resistance test, we conducted a test in which we were left outdoors, and the result was NO. The conventional product No. 2 develops red rust after about 3 days, and after 10 days or more, red rust develops on almost the entire surface, but NO. l of the present invention, NO.
．． No. 3 Sn hot-dip plating and NO. 4 SUS3O4 is 1
Even after 00 days or more, no red rust was observed.
The table shows a comprehensive evaluation of various performance test results.
この結果、本発明品は各項目の性能においても最も優れ
ており、強靭かつ耐食性に優れていることがわかる。第
４図は本発明の強靭で、かつ耐食性に優れたリンクチェ
ーンを製作する製造工程（４）と従来法褐．３の工程（
Ｂ）を示すブロック図である。As a result, it can be seen that the product of the present invention has the best performance in each item, and has excellent toughness and corrosion resistance. Figure 4 shows the manufacturing process (4) for manufacturing a link chain of the present invention that is strong and has excellent corrosion resistance, and the conventional method. Step 3 (
It is a block diagram showing B).
製造工程においても従来方法に比べて約半分の工程で済
むことがわかる。〔発明の効果〕
従来機械機構部材の耐食性を得るためには、簡易法とし
てメッキ処理が施されるが強度を要する場合、従来のＺ
ｎ及びＳｎなどの溶融メッキでは処理温度が高いため強
度の低下を余儀なくされていた。It can be seen that the manufacturing process is about half that of the conventional method. [Effects of the Invention] Conventionally, plating treatment is performed as a simple method to obtain corrosion resistance of mechanical mechanism members, but when strength is required, conventional Z
Hot-dip plating with n, Sn, etc. requires a reduction in strength due to the high processing temperature.
本発明によれば低温の溶融メッキ浴に投入して焼入れと
メッキとを同時に行うので、製造工程も短縮でき、特性
の優れたリンクチェーンが得られる優れた効果を有する
。According to the present invention, since quenching and plating are performed at the same time by placing the chain in a low-temperature hot-dip plating bath, the manufacturing process can be shortened and a link chain with excellent properties can be obtained.
【図面の簡単な説明】
第１図は各種処理を施したリンクチェーンの引張試験結
果を示すグラフ、第２図は同じく疲れ試験結果を示すグ
ラフ、第３図は同じく摩耗試験結果を示すグラフ、第４
図は製造工程を示すブ七ツク図である。[Brief explanation of the drawings] Figure 1 is a graph showing the results of a tensile test of link chains subjected to various treatments, Figure 2 is a graph showing the results of a fatigue test, and Figure 3 is a graph showing the results of a wear test. Fourth
The figure is a block diagram showing the manufacturing process.
Claims (1)
３％以下、Ｍｏ０．１〜１％、Ｆｅ残部よりなる鉄合金
によつて構成されたリンクチェーンの表面に浸炭および
窒化の少なくとも１つの処理を施した後、重量％でＰｂ
２２〜４４％、残部ＳｎよりなＳｎ−Ｐｂ合金の溶融浴
中に投入して焼入硬化させ且つ該リンクチェーン表面に
前記Ｓｎ−Ｐｂ合金の薄層を形成させることを特徴とす
るリンクチェーンの製造法。1% by weight: C0.1-0.4%, Si1% or less, Mn
After performing at least one of carburizing and nitriding on the surface of a link chain made of an iron alloy consisting of 3% or less Mo, 0.1-1% Mo, and the balance Fe, Pb
A link chain characterized by being put into a molten bath of a Sn-Pb alloy containing 22 to 44% Sn and the balance being quenched and hardened to form a thin layer of the Sn-Pb alloy on the surface of the link chain. Manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1832479A JPS6050870B2 (en) | 1979-02-21 | 1979-02-21 | Link chain manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1832479A JPS6050870B2 (en) | 1979-02-21 | 1979-02-21 | Link chain manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55110719A JPS55110719A (en) | 1980-08-26 |
| JPS6050870B2 true JPS6050870B2 (en) | 1985-11-11 |
Family
ID=11968426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1832479A Expired JPS6050870B2 (en) | 1979-02-21 | 1979-02-21 | Link chain manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6050870B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104097848A (en) * | 2014-07-25 | 2014-10-15 | 武汉钢铁(集团)公司 | High-intensity and corrosion-resistant Pb-Sn composite coating binding band and production method thereof |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2531105A1 (en) * | 1982-07-27 | 1984-02-03 | Inst Mash Im | Process for thermochemical treatment of steel and alloy articles and articles treated in accordance with the said process. |
| DE3713401C1 (en) * | 1987-04-21 | 1988-03-10 | Korf Engineering Gmbh | Process for cooling heated material and device for carrying out the process |
| EP2364373A1 (en) * | 2008-12-09 | 2011-09-14 | NV Bekaert SA | Patenting of steel wire in tin, and the steel wire resulting therefrom |
-
1979
- 1979-02-21 JP JP1832479A patent/JPS6050870B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104097848A (en) * | 2014-07-25 | 2014-10-15 | 武汉钢铁(集团)公司 | High-intensity and corrosion-resistant Pb-Sn composite coating binding band and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55110719A (en) | 1980-08-26 |
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