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

Roll outer layer material for rolling, and composite roll for rolling

A technology of outer layer material and composite roll, applied in the direction of roll, metal rolling, metal rolling, etc., can solve the problems of easy segregation, segregation, easy agglomeration, etc.

Active Publication Date: 2019-04-16
JFE STEEL CORP
View PDF18 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cemented carbide formed with the composition of high-speed steel is generally lighter in specific gravity than the base, and is prone to segregation in casting
In particular, in the centrifugal casting method, which is a typical roll outer layer material because of its excellent productivity and economical efficiency, the phase with a light specific gravity tends to gather and segregate inside due to the centrifugal force, so it is difficult to utilize centrifugal casting. Casting method to manufacture high-speed steel roll outer layer material

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
  • Roll outer layer material for rolling, and composite roll for rolling
  • Roll outer layer material for rolling, and composite roll for rolling
  • Roll outer layer material for rolling, and composite roll for rolling

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach 〕

[0127] The rolling roll outer layer material of the present invention is centrifugally cast. The "centrifugally cast rolling roll outer layer material" as used herein refers to a rolling roll outer layer material in a state produced by a centrifugal casting method conventionally used as a rolling roll manufacturing method. The rolling roll outer layer material produced by the centrifugal casting method ("centrifugal casting" rolling roll outer layer material) can be clearly distinguished as a "product" from the rolling roll material manufactured by a conventional manufacturing method other than this, In addition, it is impractical to determine the "centrifugal casting" roll outer layer material with structure and performance, requiring a lot of labor.

[0128] The roll outer layer material for rolling of the present invention is made of a W-Co-based alloy, and has a composition in which the W content decreases radially from the outer peripheral side of the roll to the inner pe...

no. 2 Embodiment approach 〕

[0164] The rolling roll outer layer material of the present invention is centrifugally cast. The "centrifugally cast rolling roll outer layer material" as used herein refers to a rolling roll outer layer material in a state produced by a centrifugal casting method conventionally used as a rolling rolling roll manufacturing method. Rolling roll outer layer materials produced by centrifugal casting ("centrifugal casting" rolling roll outer layer materials) and rolling rolls manufactured by conventional manufacturing methods other than this method can be classified as "products". It is impractical to make a clear distinction between different forms, and to determine the outer layer material of the "centrifugal casting" rolling roll with structure and performance, which requires a lot of labor.

[0165] The roll outer layer material for rolling of the present invention is made of a W-Co-based alloy, has a gradient composition in which the W content decreases from the outer periphe...

Embodiment 1

[0210] First, examples in the first embodiment described above will be described.

[0211] The molten metal of the composition shown in Table 1 was melted in a high-frequency induction furnace, and cast into a sleeve-shaped roller outer layer material (outer diameter: Radial wall thickness: 55mm). It should be noted that the casting temperature is 1450-1550°C, and the centrifugal force is 140-220G in multiples of gravity. In some test materials (molten metal No. S), since significant carbide segregation toward the inner surface occurred, it was set to 60G for the purpose of reducing the segregation. After casting, reheat to 1050-1200°C and keep for 10h, then repeat the quenching treatment of cooling to below 100°C and the tempering treatment of cooling after heating and keeping at 400-560°C once or twice. Thereby, the hardness from the outer surface of a test material to the position of 5 mm along the thickness direction was adjusted to about 85-100 HS. It should be noted ...

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
Outer diameteraaaaaaaaaa
The inside diameter ofaaaaaaaaaa
Young's modulusaaaaaaaaaa
Login to View More

Abstract

Provided are a roll outer layer material and a composite roll for rolling that have remarkably improved abrasion resistance. A roll outer layer material that has a W-Co-based alloy composition: that is a graded composition in which W content decreases in the radial direction from an outer circumferential side toward an inner circumferential side; and that, at an outer layer material surface that is located at a maximum diameter during rolling, contains, by mass%, 25%-70% of W, 5%-45% of Co, 0.6%-3.5% of C, 0.05%-3% of Si, 0.05%-3% of Mn, and 1%-15% of Mo, the remainder being unavoidable impurities. The roll outer layer material is preferably produced by centrifugal casting.

Description

technical field [0001] The first embodiment of the present invention relates to a rolling roll outer layer material suitable for hot rolling or cold rolling and a rolling composite roll using the rolling roll outer layer material, and in particular to improvement of wear resistance . [0002] In addition, the second embodiment of the present invention relates to a rolling roll outer layer material suitable for hot rolling or cold rolling and a rolling composite roll using the rolling roll outer layer material, and particularly relates to wear resistance Improvement and reduction of rolling load. Background technique [0003] [First Embodiment] [0004] First, in the first embodiment, in recent years, the rolling technology of steel sheets has been significantly improved, and accordingly, the use environment of rolling rolls has become more severe. In particular, recently, the production volume of high-strength steel sheets, thin-walled products, and other steel sheets tha...

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
IPC IPC(8): B21B27/00B22D13/02C22C27/04C22C30/00C22F1/00C22F1/18
CPCB22D13/02C22C27/04C22C30/00C22F1/00C22F1/18B22D13/023C22C19/07B21B27/03B21B27/00C22C29/08
Inventor 市野健司铃木健史岩田直道持田哲男石田清仁大沼郁雄
Owner JFE STEEL CORP
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