Supercharge Your Innovation With Domain-Expert AI Agents!

Process for producing hot-pressed member

一种制造方法、部件的技术，应用在制造工具、化学仪器和方法、叠加层的镀覆等方向，能够解决冲压成型性降低等问题

Inactive Publication Date: 2013-08-07
JFE STEEL CORP
View PDF16 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the strength of the steel sheet increases, its press formability decreases, so it is often difficult to form the steel sheet into a desired part shape

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Process for producing hot-pressed member
  • Process for producing hot-pressed member
  • Process for producing hot-pressed member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] As the base steel sheet, a hot-rolled steel sheet with a thickness of 2.3 mm having the following composition, that is, containing C: 0.10%, Si: 0.02%, Mn: 1.2%, P: 0.01%, and S: 0.003% by mass % , Al: 0.03%, N: 0.003%, Ti: 0.12%, Mo: 0.22%, and the remainder is a hot-rolled steel sheet composed of Fe and unavoidable impurities. Change the current density to 5-100A / dm in a plating bath containing 200g / L nickel sulfate hexahydrate and 10-100g / L zinc sulfate heptahydrate at a pH of 1.5 and a temperature of 50°C 2 , the surface of the hot-rolled steel sheet is subjected to electroplating treatment to form Zn—Ni alloy plating layers with different Ni content and deposition amount. In addition, before the above-mentioned Zn-Ni alloy coating is formed, in a plating bath containing 200g / L of nickel sulfate hexahydrate and 0-50g / L of zinc sulfate heptahydrate at a pH of 3.0 and a temperature of 50°C, the The current density changes from 5 to 100A / dm 2 , Part of the steel plat...

Embodiment 2

[0087] On the surface of the same base steel sheet as in Example 1, Zn—Ni alloy plating layers having different Ni contents and deposition amounts were formed by the same method as in Example 1. In addition, in some steel sheets, by the same method as in Example 1, prior to the formation of the above-mentioned Zn-Ni alloy plating layer, an underlayer plating layer having a different Ni content and deposition amount was formed. Thereafter, a compound containing one of Si-containing compounds, Ti-containing compounds, Al-containing compounds, Zr-containing compounds, and Si and Zr-containing compounds shown below is coated on the Zn-Ni alloy plating layer, and the remainder is composed of a solvent. composition (solid content ratio 15% by mass), drying is carried out under the condition that the steel plate reaches a temperature of 140°C, and Si-containing compound layers, Ti-containing compound layers, and Al-containing compound layers with different thicknesses shown in Tables ...

Embodiment 3

[0111] On the surface of the same base steel sheet as in Example 1, the lower layer plating layer shown in Table 4 and the Zn—Ni alloy plating layer were sequentially formed in the same manner as in Example 1. Thereafter, on the Zn-Ni alloy plating layer, the inorganic solid lubricant shown in Table 4 was coated in the same method as in Example 2, and the remaining After the composition (solid content ratio: 15% by mass) partially composed of a solvent was dried under the condition that the steel plate reached temperature was 140° C., the Si-containing compound layer shown in Table 4 was formed, and steel plates Nos. 1 to 17 were produced. As the inorganic solid lubricant shown in Table 4, the following compounds were used. It should be noted that a compound layer not containing an inorganic solid lubricant was formed in some of the steel sheets.

[0112] Molybdenum disulfide: LM-13 manufactured by Daito Lubricants Co., Ltd.

[0113] Graphite: GP-60S manufactured by Hitachi ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
adhesion amountaaaaaaaaaa
adhesion amountaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

Provided is a process for producing a hot-pressed member which can keep corrosion resistance after coating. The process for producing a hot-pressed member is characterized by heating a steel sheet at a temperature ranging from 200-800 DEG C and then subjecting the heated steel sheet to hot press molding at the aforementioned temperature, wherein the steel sheet has, on the surface thereof, a Zn-Ni alloy plating layer which comprises 10-25 mass% of Ni and a remainder made up by Zn and unavoidable impurities, wherein the alloy plating layer is attached in an amount of 10-90 g / m<2>.

Description

technical field [0001] The invention relates to a method for manufacturing warm press parts suitable for manufacturing automobile running parts, vehicle body structural parts and the like. Background technique [0002] Conventionally, parts such as undercarriage parts and vehicle body structural parts of automobiles are often manufactured by press forming a steel plate having a predetermined strength. In recent years, from the viewpoint of protecting the global environment, the weight reduction of automobile bodies has been eagerly desired, and efforts have been made to increase the strength and reduce the thickness of the steel sheets used. However, as the strength of the steel sheet increases, the press formability thereof decreases, and thus it is often difficult to form the steel sheet into a desired part shape. [0003] Therefore, the technology of heating the steel plate in advance and then press forming has attracted attention. Among them, the warm press forming tech...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/26B21D22/20C21D9/46C22C18/00C22C19/03C22C38/00C22C38/06C22C38/60C23C28/00
CPCC21D9/46C25D5/50C22C18/00B21D22/022C21D1/673C23C2/28B32B15/013C23C2/06C22C38/12B32B15/015C22C38/001C22C38/02C22C38/04C22C38/06C22C38/14G01N19/02C25D5/14C25D3/12C25D3/565C25D5/48C25D5/12B23K20/02B21D22/20C25D5/617C25D7/0614
Inventor 中岛清次三好达也中丸裕树
Owner JFE STEEL CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com