Method for casting roller with thick working layer

A pouring method and technology of working layer, applied in the field of pouring of thick working layer rolls, can solve problems such as poor bonding and insufficient working layer thickness, and achieve the effects of improving service life, avoiding insufficient bonding layer thickness, and good metallurgical bonding

Inactive Publication Date: 2010-02-24
ANSTEEL HEAVY MACHINERY CO LTD
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When pouring the molten iron in the core, if the core is filled according to the temperature at which the inner surface can be combined with the core, due to the existence of thermal joints inside the centrifugal working layer, the centrifugal layer wil

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 2

[0021] A method for pouring a roll with a thick working layer. The working layer of the roll adopts a centrifugal double-layer pouring method. The inner surface temperature of the first layer of molten iron poured in the working layer of the roll is below the freezing point, and then the second layer of molten iron is poured, and then the Filler. The inner surface temperature of the first layer of molten iron poured in the working layer of the roll is 30-50°C below the freezing point, and the thickness ratio of the poured first layer of molten iron to the solidified second layer of molten iron is 2 / 3:1.

[0022] The composition of the first layer of molten iron and the second layer of molten iron is the same, and the proportions of the components are as follows: C 3.2-3.5, Si 2.0-2.5, Mn 0.4-0.8, P<0.1, S<0.03, Cr 0.5-0.8 , Ni 2.0-2.5, Mo 0.5-0.8.

[0023] Concrete processing step is with embodiment 1.

[0024] This method lowers the inner surface of the ...

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

No PUM Login to view more

Abstract

The invention relates to a method for casting a roller with a thick working layer. The working layer of the roller adopts a centrifugal double-layer casting method; and when the inner surface temperature of a first layer of molten iron cast on the working layer of the roller is below a solidifying point, a second layer of molten iron is cast, and then core filling is performed. The inner surface temperature of the first layer of molten iron cast on the working layer of the roller is 10 to 50 DEG C lower than the solidifying point. The thickness ratio of the cast first layer of molten iron andthe cast second layer of molten iron after solidification is (1/2-2/3):1. Because the inner surface temperature of the first layer is low, and the cast second layer of molten iron can be solidified ina sequential mode, the formation of a hot spot is eliminated, the insufficient thickness of a bonding layer and the generation of waste with poor bonding when core part molten iron is cast are avoided, and good metallurgical bonding is realized.

Description

technical field [0001] The invention relates to the field of manufacturing composite cast iron rolls, in particular to a pouring method for thick working layer rolls. Background technique [0002] The thickness of molten iron in the working layer of commonly used centrifugal rolls is less than 100mm. The thickness of the working layer of the rolls of the E-rolling mill is required to be 180mm. The rolls are produced according to conventional methods. Due to the large thickness of the working layer, in the process of centrifugal casting, the rolls are affected by the external cooling speed and internal cooling rate. The surface cooling speed is faster, but the cooling speed inside the centrifugal working layer is slow, and it is easy to generate heat knots inside the centrifugal working layer. When pouring the molten iron in the core, if the core is filled according to the temperature at which the inner surface can be combined with the core, due to the existence of thermal jo...

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): B22D13/02
Inventor 艾忠诚李凯杜立朝
Owner ANSTEEL HEAVY MACHINERY CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap