Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Improved nickel chromium molybdenum inlimited cold hard cast-iron for roller and its compound roller

An infinitely chilled cast iron, nickel-chromium-molybdenum technology, applied in the field of composite rolls, can solve the problems of affecting the surface quality of rolled strips, poor thermal crack resistance, and affecting the production efficiency of rolling mills, achieving improved thermal crack resistance, The effect of reducing the labor intensity of operation and improving the surface quality

Active Publication Date: 2007-07-18
JIANGSU GONGCHANG ROLL
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the graphite is in the form of flat strips and the carbides are in the form of a network, the matrix strength of this material is relatively low. Therefore, in actual use, its wear resistance is still insufficient and the service life is not long (mm rolling amount is generally 2000-3000 tons); Secondly, due to the network structure of carbides and the boundary effect of graphite voids, the thermal crack resistance of the material is also poor. The increase will cause thermal cracks, so it is necessary to stop frequently to replace the roll, remove it for repair
It not only affects the shift production efficiency of the rolling mill, increases the replacement operation intensity, and the repair workload; but also affects the surface quality of the rolled strip, and the repair of thermal cracks also reduces the service life of the roll, resulting in higher production costs

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
  • Improved nickel chromium molybdenum inlimited cold hard cast-iron for roller and its compound roller
  • Improved nickel chromium molybdenum inlimited cold hard cast-iron for roller and its compound roller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: In GB / T1504-91 nickel-chromium-molybdenum infinite chilled cast iron (IV) molten iron, add 0.05wt% (in pure substance) of boron-iron alloy and 0.8% (in pure substance) of niobium-iron alloy.

Embodiment 2

[0017] Example 2: As in Example 1, 0.07wt% (in pure matter) of boron-iron alloy and 1wt% (in pure matter) of niobium-iron alloy were added respectively.

Embodiment 3

[0018] Embodiment 3: As in Embodiment 1, 0.09wt% (calculated as pure substance) of boron-iron alloy and 1.3wt% (calculated as pure substance) of ferroniobium alloy were added respectively.

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

This invention relates to an improvement of NiCrMo infinite cooling hard cast iron used in roll materials of metal machining hot rolling and cold rolling plate, especially relates to a kind of NiCrMo infinite cold hard cast iron used in roll with excellent wear resistance and thermal crack resistance property, long longevity, the character is adding 0.03-0.1%(WT) B and 0.2-1.5% Nb in the component of NiCrMo infinite cold hard cast iron. As well as the composite roll made from this materials. Because of the addition of B and Nb, the wear resistance and thermal crack resistance property are remarkably improved, which overcomes the disadvantage of raw materials. The operating life of composite roll whose working layers are made from this materials is enormously improved compared with original life. The plate band rolling amount increases more than 20%; the improvement of thermal crack resistance property.

Description

technical field [0001] The present invention relates to the improvement of the roll material used for metal processing hot rolling and cold rolling strips - nickel chromium molybdenum infinite chilled cast iron, especially relates to a kind of nickel for rolls with good wear resistance and thermal crack resistance and long service life Chromium molybdenum infinite chilled cast iron and composite rolls made of this material. Background technique [0002] The existing roll material for hot rolling and cold rolling of strips - nickel-chromium-molybdenum infinite chilled cast iron (IV) (GB / T1504-91), the composition is: C: 2.90-3.70%, Si: 0.60-1.20%, Mn Ni: 0.40-1.20%, Ni: 3.01-5.00%, Cr: 1.00-2.00%, Mo: 0.20-0.60%. Because the graphite is in the form of flat strips and the carbides are in the form of a network, the matrix strength of this material is relatively low. Therefore, in actual use, its wear resistance is still insufficient and the service life is not long (mm rolling...

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): C22C37/08
Inventor 邵顺才张文君蒋国钧
Owner JIANGSU GONGCHANG ROLL
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
Eureka Blog
Learn More
PatSnap group products