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

A heat treatment method for improving the morphology of residual austenite and improving the mechanical properties of trip steel

A heat treatment method and morphology technology, applied in heat treatment furnace, heat treatment equipment, improvement of process efficiency, etc., can solve problems such as unreachable, and achieve the effects of fast heating rate, uniform heating, and short heat treatment cycle.

Active Publication Date: 2019-05-14
NORTHEASTERN UNIV LIAONING
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The strength of the TRIP steel produced by the traditional process in the past is 780MPa, which shows that the parameters of the heat treatment process in the past have not yet reached an optimal value.

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
  • A heat treatment method for improving the morphology of residual austenite and improving the mechanical properties of trip steel
  • A heat treatment method for improving the morphology of residual austenite and improving the mechanical properties of trip steel
  • A heat treatment method for improving the morphology of residual austenite and improving the mechanical properties of trip steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A heat treatment method for improving the para-austic morphology and improving the mechanical properties of TRIP steel, comprising the following steps:

[0034] Step 1: Austenitizing pretreatment system

[0035] Select fully cleaned TRIP780 cold-rolled sheet as the initial material, put it in a salt bath, perform austenitizing pretreatment, and then water quench to obtain austenitizing pretreated steel plate; among them, the temperature of austenitizing pretreatment The temperature is 925℃, and the time of austenitizing pretreatment is 90s;

[0036] The fully cleaned TRIP780 cold-rolled steel plate is a standard tensile test sample with a gauge length of 50mm made from a 1.2mm thick TRIP780 cold-rolled steel plate according to GB / T228-2010.

[0037] The cleaning steps for the fully cleaned TRIP780 cold-rolled sheet are: first use acetone to remove rust and oil, and then use alcohol to clean it to avoid uneven heating during heat treatment.

[0038] Step 2: Transition ...

Embodiment 2

[0048] A heat treatment method for improving the para-austic morphology and improving the mechanical properties of TRIP steel, comprising the following steps:

[0049] Step 1: Austenitizing pretreatment system

[0050] Select fully cleaned TRIP780 cold-rolled sheet as the initial material, put it in a salt bath, perform austenitizing pretreatment, and then water quench to obtain austenitizing pretreated steel plate; among them, the temperature of austenitizing pretreatment The temperature is 925℃, and the time of austenitizing pretreatment is 90s;

[0051] The fully cleaned TRIP780 cold-rolled steel plate is a standard tensile test sample with a gauge length of 50mm made from a 1.2mm thick TRIP780 cold-rolled steel plate according to GB / T228-2010.

[0052] The cleaning steps for the fully cleaned TRIP780 cold-rolled sheet are: first use acetone to remove rust and oil, and then use alcohol to clean it to avoid uneven heating during heat treatment.

[0053] Step 2: Transition ...

Embodiment 3

[0063] A heat treatment method for improving the para-austic morphology and improving the mechanical properties of TRIP steel, comprising the following steps:

[0064] Step 1: Austenitizing pretreatment system

[0065] Select fully cleaned TRIP780 cold-rolled sheet as the initial material, put it in a salt bath, perform austenitizing pretreatment, and then water quench to obtain austenitizing pretreated steel plate; among them, the temperature of austenitizing pretreatment The temperature is 925℃, and the time of austenitizing pretreatment is 90s;

[0066] The fully cleaned TRIP780 cold-rolled steel plate is a standard tensile test sample with a gauge length of 50mm made from a 1.2mm thick TRIP780 cold-rolled steel plate according to GB / T228-2010.

[0067] The cleaning steps for the fully cleaned TRIP780 cold-rolled sheet are: first use acetone to remove rust and oil, and then use alcohol to clean it to avoid uneven heating during heat treatment.

[0068] Step 2: Transition ...

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
sizeaaaaaaaaaa
tensile strengthaaaaaaaaaa
strengthaaaaaaaaaa
Login to View More

Abstract

A heat treatment method for improving the morphology of Paralympic steel and improving the mechanical properties of TRIP steel, which belongs to the field of new material heat treatment technology. The method is: put the TRIP steel cold-rolled plate into a salt bath, perform austenitizing pretreatment at 905-945°C for 60-120 seconds, and quench; put the obtained austenitizing pre-treated steel plate into the salt bath In the process, the two-phase zone transformation is carried out at 760~820℃ for 60~180s; the obtained steel plate with two-phase structure of ferrite and austenite is quickly placed into the bainite transformation zone at 460~520℃ and isothermal quenched for 15~35s. , then quickly put it into the bainite transformation zone at 380~440℃, perform isothermal quenching for 205~225s, and quickly water quench to obtain high strength and high plasticity TRIP steel. The process parameters of this method are reasonably selected and combined with each other to obtain a large amount of evenly distributed film-like retained austenite, which is conducive to better exerting the TRIP effect, thereby improving the strength and plasticity of TRIP steel. It is expected to become an effective process for realizing lightweight automobiles. .

Description

technical field [0001] The invention belongs to the technical field of heat treatment of new materials, and in particular relates to a heat treatment method for improving the morphology of para-alcohol and improving the mechanical properties of TRIP steel. Background technique [0002] In order to solve the environmental problems and energy crisis brought about by the rapid economic development, the steel industry and the automotive steel industry have undergone transformation and development in recent years. The lightweight and safe production of automotive steel has become the main goal of current research and application. TRIP steel (Transformation Induced Plasticity Steel) has both high strength and good ductility, and is widely used in automobile companies. Its excellent mechanical properties mainly depend on the TRIP effect and the multiphase structure in TRIP steel. The TRIP effect refers to the phenomenon that the material is transformed from the soft phase austenit...

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): C21D1/18C21D1/20C21D9/00
CPCC21D1/18C21D1/20C21D9/0081C21D2211/001C21D2211/002C21D2211/005Y02P10/20
Inventor 刘沿东李俊博许森刘芳策王帅
Owner NORTHEASTERN UNIV LIAONING
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