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Alloyed galvanized steel sheet surface treating agent, preparation method, alloyed galvanized steel sheet and hot forming part

A technology of surface treatment agent and galvanized steel sheet, which is applied in the field of auto parts manufactured by hot stamping, can solve the problems of affecting the phosphatability of parts, the decline of coating performance, and the pollution of degreasing bath, so as to improve the surface quality, inhibiting the formation of zinc oxide, and reducing the contact area

Pending Publication Date: 2021-03-19
MAANSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the film weight of its phosphate has reached the heavy level of phosphating film in the subsequent coating process. Since phosphate can be dissolved in the degreasing solution, it will pollute the degreasing bath solution, and the residual phosphate will seriously affect the phosphatability of parts , resulting in the decline of coating performance such as secondary phosphating

Method used

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  • Alloyed galvanized steel sheet surface treating agent, preparation method, alloyed galvanized steel sheet and hot forming part
  • Alloyed galvanized steel sheet surface treating agent, preparation method, alloyed galvanized steel sheet and hot forming part
  • Alloyed galvanized steel sheet surface treating agent, preparation method, alloyed galvanized steel sheet and hot forming part

Examples

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Embodiment Construction

[0053] The present invention will be further described below in conjunction with specific examples and comparative examples.

[0054] Table 1 shows the substrate components used in each of the Examples and Comparative Examples.

[0055] Table 1 Substrate Composition

[0056]

[0057]

[0058] After the substrates of Examples 1-6 and Comparative Examples 1-2 are hot-rolled→cold-rolled→substrate cleaning→continuous annealing→hot-dip galvanizing→coating thickness control→alloying→cooling, they are then coated on the surface of the galvanized layer , using a 3# scraper to evenly coat the surface treatment agent prepared in each embodiment and comparative example on the steel plate, dry it with hot air, and apply Parka RH550NH anti-rust oil after cooling, the thickness of the oil film is 0.5-2g / m 2 . After standing for 24 hours, a comparative simulation of thermoforming was carried out. The heating temperature was 900°C, and the heating time was 5 minutes. Then, it was quen...

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Abstract

The invention discloses an alloyed galvanized steel sheet surface treating agent, a preparation method, an alloyed galvanized steel sheet and a hot forming part, and belongs to the field of metallurgy. The surface treating agent is mainly prepared from 0.01mol / L-0.10mol / L of Mn<2+>, 0.001mol / L-0.020mol / L of Ni<2+> and 0.02mol / L-0.24mol / L of PO4 <3->, the Mn <2+> and the Ni <2+> are respectively added in the forms of manganese salt and nickel salt, and the pH value of the surface treating agent is 1.5-4.0. The preparation method comprises the following steps of dissolving Mn(H2PO4)2.4H2O and Ni(NH2SO3)2.4H2O in deionized water, uniformly mixing and adjusting the pH value with H3PO4 to obtain the surface treating agent. The surface of an alloyed galvanized steel sheet sequentially comprisesan alloyed galvanized layer and a surface treatment layer, and the surface treatment layer is formed by forming a film through the surface treatment agent. The hot forming part is obtained through a hot forming stamping process, and a surface oxidation film is compact.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and more specifically relates to a surface-treated alloyed galvanized hot-formed steel plate and auto parts manufactured by using the steel plate through hot stamping. Background technique [0002] In recent years, the laws and regulations of various countries in the world have increasingly stringent requirements on automobile carbon emissions. High-strength parts such as hot forming have been widely used in the manufacture of automobile bodies. While reducing the weight of the car body, the crash performance of the car body is ensured. On the other hand, due to the demand for automobile durability, the anti-corrosion performance of the body has also become the focus of users, so coated hot-formed steel is used in the manufacture of automobile parts. [0003] Among coated hot forming steels, zinc-based coated hot forming steels have been valued due to their excellent sacrificial anode protecti...

Claims

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Application Information

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IPC IPC(8): C23C22/18C22C18/00C22C38/02C22C38/04C22C38/06C22C38/22C22C38/24C22C38/26C22C38/28C22C38/32C23C2/26
CPCC23C22/18C22C18/00C22C38/02C22C38/04C22C38/002C22C38/06C22C38/22C22C38/32C22C38/001C22C38/28C22C38/26C22C38/24C23C2/26
Inventor 李子涛单梅晋家春王辉王伟峰代朋虎邓宗吉计遥遥崔磊刘永刚张军詹华
Owner MAANSHAN IRON & STEEL CO LTD
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