Unlock instant, AI-driven research and patent intelligence for your innovation.

Ferritic stainless steel having excellent sound absorption properties for exhaust system heat exchanger and method of manufacturing same

An exhaust system and heat exchanger technology, applied in the field of ferritic stainless steel and manufacturing said ferritic stainless steel, can solve the problems of improving sound absorption, not using inclusions, etc., to improve quietness and durability The effect of excellent sound absorption performance

Active Publication Date: 2019-05-21
浦项股份有限公司
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no studies on the influence of the type, amount and form of inclusions that are indispensable in ferritic stainless steel materials on sound absorption performance, and no attempts and results have been made to improve sound absorption using inclusions

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
  • Ferritic stainless steel having excellent sound absorption properties for exhaust system heat exchanger and method of manufacturing same
  • Ferritic stainless steel having excellent sound absorption properties for exhaust system heat exchanger and method of manufacturing same
  • Ferritic stainless steel having excellent sound absorption properties for exhaust system heat exchanger and method of manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0042] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The following embodiments are provided to convey the technical idea of ​​the present disclosure to those of ordinary skill in the art. However, the present disclosure is not limited to these embodiments, and may be implemented in another form. In the drawings, parts irrelevant to the description may not be shown in order to clarify the present disclosure, and also, for easy understanding, the size of components is shown exaggerated to a greater or lesser extent.

[0043] The inventors of the present disclosure have conducted various studies to improve the sound absorption performance of a ferritic stainless steel material when used for an exhaust system heat exchanger, and have obtained the following findings.

[0044] Normally, in carbon steel, dissolved C and N fluctuate in the lattice, causing energy loss during vibration, and sound absorption ...

Embodiment

[0115] Molten steels having the compositions shown in Table 1 were prepared and used to produce slabs by continuous casting.

[0116] [Table 1]

[0117]

[0118] The slab was reheated to 1300 °C, and respectively according to figure 2 The hot rough rolling mode is used for hot rough rolling. Subsequently, cold rolling and annealing were performed to obtain a cold rolled and annealed sheet having a thickness of 1 mm.

[0119] Examples 1 and 2 and Comparative Examples 3 and 4 show inventive steel 1 and inventive steel 2 and comparative steel 1 and comparative steel 2 rolled according to the rough rolling mode of the present disclosure, respectively. In addition, Comparative Examples 1, 2, 5 and 6 show the inventive steel 1 and the inventive steel 2 and the comparative steel 1 and the comparative steel 2 rolled according to the conventional rough rolling mode, respectively.

[0120] That is, according to the rough rolling mode of the present disclosure, the steel sheet is ...

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
lengthaaaaaaaaaa
Login to View More

Abstract

Disclosed are a ferritic stainless steel having excellent sound absorption properties for an exhaust system heat exchanger and a method of manufacturing same. The ferritic stainless steel having excellent sound absorption properties for an exhaust system heat exchanger, according to one embodiment of the present invention, comprises: 0.001-0.01 wt % of C,0.001-0.01 wt % of N,0.2-1 wt % of Si,0.1-2wt % of Mn,10-30 wt % of Cr,0.001-0.1 wt % of Ti,0.001-0.015 wt % of Al,0.3-0.6 wt % of Nb,0.01-2.5 wt % or less of Mo, and the remainder being Fe and unavoidable impurities, wherein an inclusion present in a ferrite matrix and satisfying formula (1) below is 5ea / mm2 or greater. Formula (1): L / T >= 3, wherein L is the length of the long side of the inclusion and T is the length of the short sideof the inclusion.

Description

technical field [0001] The present disclosure relates to a ferritic stainless steel for an exhaust system heat exchanger and a method of manufacturing the ferritic stainless steel, and more particularly, to a ferritic stainless steel for an exhaust system heat exchanger having excellent sound absorption properties Body stainless steel and method of manufacture thereof. Background technique [0002] As awareness of environmental issues has grown in recent years, exhaust gas regulations have become increasingly stringent and stricter limits have been set on carbon dioxide emissions in the automotive sector. In addition to the development of alternative fuels such as bioethanol and biodiesel, efforts have been made to improve fuel efficiency by reducing the weight of vehicles or installing heat exchangers for recovering waste heat, or installing exhaust gas treatment systems such as exhaust gas recirculation (EGR) systems , Diesel Particulate Filter (DPF) and Selective Catalyt...

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): C22C38/00C22C38/02C22C38/04C22C38/38C22C38/28C22C38/06C22C38/26C22C38/22C21D8/02
CPCC21D6/002C21D8/02C21D8/0205C21D8/0226C21D8/0236C21D9/46C22C38/00C22C38/001C22C38/002C22C38/004C22C38/02C22C38/04C22C38/06C22C38/20C22C38/22C22C38/26C22C38/28C22C38/38F28F21/083B22D11/002
Inventor 郑壹酂金锺哲沈在弘安德灿金镇锡
Owner 浦项股份有限公司