JP2002256448A5

JP2002256448A5 -

Info

Publication number: JP2002256448A5
Application number: JP2001059914A
Authority: JP
Filing date: 2001-03-05
Publication date: 2004-10-28
Anticipated expiration: 2021-03-05

Description

【発明の名称】合金化溶融亜鉛めっき鋼板の製造方法および合金化溶融亜鉛めっき鋼板 Patent application title: Method of manufacturing alloyed galvanized steel sheet and alloyed galvanized steel sheet

【０００１】
【発明の属する技術分野】
この発明は、プレス成形時における摺動性に優れた合金化溶融亜鉛めっき鋼板の製造方法および合金化溶融亜鉛めっき鋼板に関するものである。[0001]
Field of the Invention
The present invention relates to a method for producing an alloyed hot-dip galvanized steel sheet excellent in slidability at the time of press forming, and an alloyed hot-dip galvanized steel sheet .

【００１０】
本発明は上記の問題点を改善し、プレス成形時の摺動性に優れた合金化溶融めっき鋼板の製造方法および合金化溶融亜鉛めっき鋼板を提供することを目的とする。[0010]
An object of the present invention is to solve the above-mentioned problems and to provide a method for producing an alloyed hot-dip galvanized steel sheet excellent in slidability at the time of press forming and an alloyed hot-dip galvanized steel sheet .

【００１６】
(1)鉄−亜鉛合金めっき表面に面積率が20〜80％の平坦部を有し、その平坦部の表層に厚さが10nm以上の酸化物層を有する合金化溶融亜鉛めっき鋼板を製造するに際し、鋼板に溶融亜鉛めっきを施し、さらに加熱処理により合金化し、調質圧延を施した後、酸性溶液と接触させ、接触終了後1.0〜30秒放置した後水洗、乾燥することを特徴とする合金化溶融亜鉛めっき鋼板の製造方法。[0016]
(1) Producing an alloyed galvanized steel sheet having a flat portion with an area ratio of 20 to 80% on the iron-zinc alloy plated surface and having an oxide layer with a thickness of 10 nm or more on the surface layer of the flat portion At that time, the steel sheet is subjected to hot dip galvanizing, further alloyed by heat treatment, subjected to temper rolling, brought into contact with an acidic solution, left to stand for 1.0 to 30 seconds after contact, washed with water and dried. Method of manufacturing alloyed galvanized steel sheet.

【００１７】
(2)酸性溶液と接触終了後1.0〜30秒放置した後水洗、乾燥する前に、水蒸気と接触させることを特徴とする前記(1)に記載の合金化溶融亜鉛めっき鋼板の製造方法。[0017]
(2) The method for producing an alloyed galvanized steel sheet according to the above (1), characterized in that it is left to stand for 1.0 to 30 seconds after completion of contact with the acidic solution, then washed with water and dried before being dried.

【００１８】
(3)調質圧延を施した後酸性溶液と接触させる前に、アルカリ性溶液に接触させて表面の活性化処理を施すことを特徴とする前記(1)または(2)に記載の合金化溶融亜鉛めっき鋼板の製造方法。
(4) 酸性溶液と接触後該酸性溶液の付着量を片面あたり 3g/m ² 以下に調整した後 1.0 〜 30 秒放置することを特徴とする前記 (1) 〜 (3) のいずれかに記載の合金化溶融亜鉛めっき鋼板の製造方法。
(5) 酸性溶液が、 Fe および Zn イオンを含む酸性溶液であることを特徴とする前記 (1) 〜 (4) のいずれかに記載の合金化溶融亜鉛めっき鋼板の製造方法。 [0018]
(3) The alloyed melt according to the above (1) or (2), characterized in that the surface is subjected to activation treatment by contact with an alkaline solution before being brought into contact with an acidic solution after being subjected to temper rolling. Method of manufacturing galvanized steel sheet.
(4) After contact with an acidic solution, the adhesion amount of the acidic solution is adjusted to 3 g / m ² or less per one side , and then left for 1.0 to 30 seconds , as described in any of the above (1) to (3). Of alloyed hot-dip galvanized steel sheet.
(5) an acidic solution, a manufacturing method of the galvannealed steel sheet according to any one of (1) to (4), characterized in that an acidic solution containing Fe and Zn ions.

【００１９】
(6) 鋼板に溶融亜鉛めっきを施し、さらに加熱処理により合金化し、調質圧延を施した後、酸性溶液と接触させ、接触終了後 1.0 〜 30 秒放置した後水洗、乾燥する合金化溶融亜鉛めっき鋼板の製造方法により生産される、鉄−亜鉛合金めっき表面に面積率が 20 〜 80 ％の平坦部を有し、その平坦部の表層に厚さが 10nm 以上の酸化物層を有することを特徴とする合金化溶融亜鉛めっき鋼板。
(7) 酸性溶液と接触終了後 1.0 〜 30 秒放置した後水洗、乾燥する前に、水蒸気と接触させることを特徴とする前記 (6) に記載の合金化溶融亜鉛めっき鋼板。 [0019]
(6) Hot-dip galvanizing is applied to the steel sheet, alloying is performed by heat treatment, tempering rolling is performed, contact with an acid solution is allowed, and after standing for 1.0 to 30 seconds after the contact is finished, it is rinsed and dried. Having a flat portion with an area ratio of 20 to 80 % on the iron-zinc alloy plated surface produced by the method for producing a plated steel sheet, and having an oxide layer having a thickness of 10 nm or more on the surface layer of the flat portion Alloyed hot-dip galvanized steel sheet characterized by
(7) The alloyed galvanized steel sheet according to the above (6) , characterized in that it is left to stand for 1.0 to 30 seconds after completion of contact with the acidic solution, then to washing with water and drying before being dried .

【００２０】
(8) 調質圧延を施した後酸性溶液と接触させる前に、アルカリ性溶液に接触させて表面の活性化処理を施すことを特徴とする前記 (6) または (7) に記載の合金化溶融亜鉛めっき鋼板。
(9) 酸性溶液と接触後該酸性溶液の付着量を片面あたり 3g/m ² 以下に調整した後 1.0 〜 30 秒放置することを特徴とする前記 (6) 〜 (8) のいずれかに記載の合金化溶融亜鉛めっき鋼板。
(10) 酸性溶液が、 Fe および Zn イオンを含む酸性溶液であることを特徴とする前記 (6) 〜 (9) のいずれかに記載の合金化溶融亜鉛めっき鋼板。 [0020]
(8) After the tempering rolling, before being brought into contact with the acidic solution, the surface is subjected to activation treatment by being brought into contact with an alkaline solution, and the alloying melting according to the above (6) or (7) Galvanized steel plate.
(9) After contact with an acidic solution, the adhesion amount of the acidic solution is adjusted to 3 g / m ² or less per one side, and left for 1.0 to 30 seconds , as described in any one of the above (6) to (8) Alloyed hot-dip galvanized steel sheet.
(10) an acidic solution, galvannealed steel sheet according to any one of the which is a acidic solution containing Fe and Zn ions (6) to (9).

Claims

When producing an alloyed galvanized steel sheet having a flat portion with an area ratio of 20 to 80% on the iron-zinc alloy plated surface and having an oxide layer with a thickness of 10 nm or more on the surface layer of the flat portion Hot-dip galvanizing, alloying by heat treatment, tempering rolling, contacting with an acidic solution, leaving it to stand for 1.0 to 30 seconds after the contact is finished, then washing with water and drying. Method of manufacturing galvanized steel sheet.

The method for producing an alloyed galvanized steel sheet according to claim 1, wherein the product is left to stand for 1.0 to 30 seconds after contact with the acidic solution, and then brought into contact with steam before being rinsed and dried.

The method for producing an alloyed galvanized steel sheet according to claim 1 or 2, wherein the surface is subjected to activation treatment by being brought into contact with an alkaline solution before being brought into contact with an acidic solution after being subjected to temper rolling. .

The alloyed molten zinc according to any one of claims 1 to 3, wherein after being brought into contact with the acidic solution, the adhesion amount of the acidic solution is adjusted to 3 g / m ² or less per one side and then left for 1.0 to 30 seconds. Method of manufacturing plated steel sheet.

An acidic solution is an acidic solution containing Fe and Zn ion, The manufacturing method of the alloying hot-dip galvanized steel sheet in any one of the Claims 1-4 characterized by the above-mentioned.

After hot-dip galvanizing the steel plate, alloying by heat treatment and tempering rolling, the steel plate is brought into contact with the acid solution, and after the termination of the contact 1.0 ~ 30 The area ratio is on the iron-zinc alloy plated surface produced by the manufacturing method of an alloyed hot-dip galvanized steel sheet which is left for a second, then rinsed and dried. 20 ~ 80 % Flat portion, and the surface layer of the flat portion has a thickness 10 nm An alloyed hot-dip galvanized steel sheet having the above oxide layer.

After contact with the acidic solution 1.0 ~ 30 After being left for a second, before being rinsed and dried, it is brought into contact with steam. 6 The galvannealed steel sheet described in 4.

The surface activation treatment is carried out by contacting with an alkaline solution before tempering rolling and before contacting with an acidic solution. 6 Or 7 The galvannealed steel sheet described in 4.

After contact with the acidic solution, the adhesion amount of the acidic solution per side 3g / m ²² After adjusting to the following 1.0 ~ 30 The second embodiment is characterized in that it is left standing for a second 6 ~ 8 The galvannealed steel sheet according to any one of the above.

The acidic solution is Fe and Zn An acidic solution containing ions 6 ~ 9 The galvannealed steel sheet according to any one of the above.