Method for manufacturing high strength steel product and steel product thereby obtained
A product, tensile strength technology, applied in the field of steel products with elongation properties and high tensile strength, high-strength steel products, can solve the problem of not improving properties
Active Publication Date: 2019-08-20
ARCELORMITTAL INVESTIGACION Y DESARROLLO SL
View PDF7 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0009] However, although this method does not impair the elongation properties of the steel, it does not improve these properties either
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0209] Table I
[0210] steel composition
[0211]
[0212] According to a first embodiment of the invention, a first series of panels (tests 1 to 7 in Tables II and III) were manufactured as follows: at a temperature T 1 Lower heating of the semi-finished product with the above composition for the duration t 1 , then heat the semi-finished product at a temperature T between 1200°C and 850°C 2 Rough rolling was carried out with a cumulative reduction strain of 2.
[0213] The plate is then cooled at a rate VR greater than 20°C / sec 1 Cool to temperature T 3 , then the cumulative reduction strain ε b undergo a final hot rolling step from the temperature T 3 start and start with temperature T 3 'Finish.
[0214] The plates were then allowed to cool to temperature QT, then immediately reheated to hold temperature PT and held at temperature PT for duration Pt (tests 3 to 6 in Table II below).
[0215] The plate is finally cooled to ambient temperature at a cooling rate gr...
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
| Property | Measurement | Unit |
|---|---|---|
| yield strength | aaaaa | aaaaa |
| tensile strength | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
Login to View More
Abstract
The present invention relates to a method for manufacturing high strength steel product and a steel product thereby obtained. The method comprises the following steps of: providing a heated steel starting product having a metastable fully austenitic structure at a temperature between 380 DEG C and 700 DEG C; subjecting the heated steel starting product to a hot forming step at a temperature of 380-700 DEG C at least one location of said heated steel starting product with a cumulative strain [epsilon]b of 0.1-0.7 to obtain a fully austenitic hot formed steel product; then quenching the steel product by cooling the hot formed steel product to a quenching temperature QT lower than Ms at a cooling rate VR2 higher than the critical martensite cooling rate to obtain a structure containing 40% to90% martensite, the remainder of the structure being austenite; and maintaining or reheating the product to a holding temperature PT of QT to 470 DEG C and held at the temperature PT for a duration Pt of 5 seconds to 600 seconds.
Description
[0001] This application is a divisional application of a Chinese patent application with an application date of November 17, 2015, an application number of "201580062477.5", and an invention title of "Method for manufacturing high-strength steel products and steel products obtained therefrom". technical field [0002] The invention relates to a method for manufacturing a high strength steel product and to a high strength steel product obtained by the method. [0003] More specifically, the present invention relates to a method for manufacturing steel products, such as steel plates or steel parts, combining good elongation properties and high tensile strength. Background technique [0004] High-strength steel plates made from DP (Dual Phase) steels or TRIP (Transformation Induced Plasticity) steels are currently used in the manufacture of various components in the automotive industry, cars and trucks. [0005] In order to reduce the weight of equipment made from these steels,...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18C21D7/13C21D8/02C21D9/46C22C38/02C22C38/04C22C38/06C22C38/38C23C2/04C23C2/06
CPCC21D1/18C21D7/13C21D8/02C21D8/0205C21D8/0226C21D9/46C22C38/02C22C38/04C22C38/06C22C38/38C23C2/04C23C2/06C21D2211/001C21D2211/008C23C2/28C23C2/29C23C2/12C21D8/0263C21D1/185C22C38/001C22C38/002C22C38/12C22C38/14C22C38/26C22C38/28C22C38/32C22C38/34C21D8/00C22C38/58
Inventor 阿特姆·阿拉扎罗夫朱康英
Owner ARCELORMITTAL INVESTIGACION Y DESARROLLO SL