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

A kind of cold-rolled strip steel for automobile flywheel processed by precision stamping and its manufacturing method

A cold-rolled steel strip and precision stamping technology, applied in the field of cold-rolled steel strip, can solve the problems of high manufacturing cost of cold-rolled steel strip, mismatch between high strength and toughness of cold-rolled steel strip, inability to meet precision stamping forming, etc. Achieve the effect of reducing energy consumption, reducing material heat treatment consumption, reducing annealing temperature and annealing holding time

Active Publication Date: 2018-10-26
SHANGHAI MEISHAN IRON & STEEL CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a precision stamping cold-rolled steel strip for automobile flywheels and its manufacturing method, which solves the problems of high manufacturing cost, high strength and poor toughness of the existing cold-rolled steel strips used for precision stamping. Matching, can not meet the technical problems of precision stamping

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 kind of cold-rolled strip steel for automobile flywheel processed by precision stamping and its manufacturing method
  • A kind of cold-rolled strip steel for automobile flywheel processed by precision stamping and its manufacturing method
  • A kind of cold-rolled strip steel for automobile flywheel processed by precision stamping and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] The present invention will be further described below in conjunction with Examples 1-4 and Comparative Example 1—disclosed in Chinese Patent Application 200780004015.3, and Comparative Example 2—disclosed in Chinese Patent Application 200910196007.4, as shown in Tables 1 to 4.

[0044] Table 1 Chemical composition of the present invention (mass percentage %), the balance is Fe and unavoidable impurities.

[0045]

[0046] The molten steel that meets the required chemical composition is obtained through converter melting. The molten steel is refined in the LF ladle refining furnace, and the RH furnace is subjected to vacuum cycle degassing treatment. The pure degassing time of RH is more than 10 minutes, and then continuous casting is carried out to obtain continuous casting steel slabs with a thickness of 210~ 230mm, width 1000~1500mm, length 5000~11000mm.

[0047] The continuous casting steel billet adopts the hot charging and hot delivery process, and is directly s...

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
yield strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a cold-rolling strip steel used for an automobile flywheel processed by precision stamping and a manufacture method thereof, which solves the technical problems that the manufacture cost of the cold-rolling strip steel used for precision stamping is high, the high strength and toughness of the cold-rolling strip steel are not matched, and the precision stamping moulding cannot be satisfied. The cold-rolling strip steel comprises the following chemical components by mass percentage: 0.49-0.54% of C, 0.15-0.30% of Si, 0.70-0.90% of Mn, less than or equal to 0.015% of P, less than or equal to 0.003% of S, 0.10-0.20% of Cr, 0.015-0.040% of Alt, and the balance of iron and unavoidable impurity. The structure is composed of block ferrite, granular pearlite and a few of sheet-shaped pearlite, the yield strength of the cold-rolling strip steel is 410-460 MPa, and the percentage elongation after fracture A50 is 25-33%. The cold-rolling strip steel is used for fine blanking of the automobile flywheels.

Description

technical field [0001] The invention relates to a cold-rolled steel strip for precise stamping, in particular to a precision stamped cold-rolled steel strip for automobile flywheels and a manufacturing method thereof. Background technique [0002] The hot-rolled steel strip produced by the hot rolling mill generally needs to undergo spheroidizing annealing and other treatments to improve the internal structure of the material so that the strength and plasticity of the material can be well matched. Widely used in precision stamping (hereinafter referred to as fine blanking) industries, such as: automobiles, machinery, hardware, electrical equipment, textiles, cameras, clocks, instruments, communication electronics and other precision parts. Traditional precision parts processing methods have many procedures and poor precision, and are generally completed by general punching, machining, forging, casting and powder metallurgy processing. After the fine blanking process is adop...

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): C22C38/18C21D8/04
Inventor 马植甄穆海玲王海军
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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