Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Hot-dip galvanized high-strength steel for internal structural parts of cars with tensile strength of 390mpa and production method thereof

A tensile strength, hot-dip galvanizing technology, applied in the field of car steel, can solve the problems of low strength, high alloy content, can not meet the requirements of lightweight body, etc., achieve high resistance to secondary processing brittleness, good zinc layer Adhesion, high strength effect

Active Publication Date: 2016-08-17
武汉钢铁有限公司
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hot-dip galvanized steel sheet for automobiles has good corrosion resistance and formability, but its strength is low, it cannot meet the requirements of lightweight body, and the alloy content is high

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
  • Hot-dip galvanized high-strength steel for internal structural parts of cars with tensile strength of 390mpa and production method thereof
  • Hot-dip galvanized high-strength steel for internal structural parts of cars with tensile strength of 390mpa and production method thereof
  • Hot-dip galvanized high-strength steel for internal structural parts of cars with tensile strength of 390mpa and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The hot-dip galvanized high-strength steel for internal structural parts of cars with a tensile strength of 390 MPa and its production method will be further described in detail below in conjunction with the accompanying drawings and specific examples.

[0033] Table 1 lists the chemical composition of six specific examples of hot-dip galvanized high-strength steel used in the production of 390MPa-grade car interior structural parts according to the present invention. The production method of steel of these six kinds of concrete examples is as follows: Carry out top-bottom composite blowing on the 90-ton converter of steelmaking plant, adopt molten iron desulfurization technology, make S≤0.002% in molten iron; Add ferroalloy, the addition is completed when 2 / 3 of the steel is tapped, the alloying sequence: aluminum iron → ferrosilicon → ferromanganese; then vacuum treatment, and fine-tuning the composition, the composition fine-tuning alloy addition sequence: aluminum sh...

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
tensile strengthaaaaaaaaaa
yield strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a hot-dip galvanized high-strength steel for internal structural parts of cars with a tensile strength of 390 MPa. Its chemical composition is calculated by weight percentage: C: 0.0027~0.0035%, Si: 0.071~0.095%, Mn: 0.78~0.95%, P: 0.060~0.075%, S≤0.003%, Als: 0.015~0.030%, Nb : 0.040-0.045%, Ti: 0.039-0.045%, B: 0.0008-0.0014, N≤0.003%, O≤0.002%, and the balance is Fe and unavoidable impurities. Its production method includes the following steps in sequence: molten iron desulfurization, converter smelting, refining outside the furnace, continuous casting, finishing, slab heating, hot continuous rolling, laminar cooling, coiling, pickling, cold continuous rolling, continuous annealing+ Hot-dip galvanized, skin-passed, finished. The steel has high-strength mechanical properties, good formability, high favorable texture content, good corrosion resistance and good surface quality requirements.

Description

technical field [0001] The invention belongs to the technical field of steel for cars, and specifically refers to a hot-dip galvanized high-strength steel for internal structural parts of cars with a tensile strength of 390 MPa and a production method thereof. Background technique [0002] With global warming, reducing vehicle emissions will continue for a long period of time in the future. Lightweight is an important trend in the development of vehicle technology and has received more and more attention and attention. However, one of the important ways to achieve this goal is to reduce the thickness of the body materials, but the safety of the car must be guaranteed, so the automobile manufacturers have higher and higher requirements for the strength of the steel materials used in the body. However, with the continuous improvement of strength, the formability of steel plates is getting worse and worse, especially for some structural parts with complex deformation of the bod...

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 Patents(China)
IPC IPC(8): C22C38/14C21D8/02
Inventor 胡宽辉田德新彭涛刘祥东冯冠文周诗正刘海军杨新泉桂洲
Owner 武汉钢铁有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com