Casting high ferrochrome or casting high chromium steel roll for welding steel pipe

A technology for welding steel pipes and high-chromium iron, applied in the field of casting rolls, can solve the problems of poor performance and use effect, low wear resistance, long process flow, etc. Effect

Active Publication Date: 2007-08-15
SHANDONG PROVINCE SIFANG TECHN DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to solve the problems existing in the process of manufacturing and using the above-mentioned welded steel pipe roll, thus providing a cast high-chromium iron or cast high-chromium steel roll to replace the current alloy tool steel forged roll , to s

Method used

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  • Casting high ferrochrome or casting high chromium steel roll for welding steel pipe

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] Referring to Figure 1, this embodiment uses a cast high-chromium iron or cast high-chromium steel roll applied to a rolling mill for rolling welded steel pipes according to the present invention. A set of two pieces of Ф530 is manufactured by a casting production process. .0 Side squeeze roll for welded steel pipe, its composition selects the following high chromium iron composition (in weight percentage): C: 1.8%, Si: ≤1.0%, Mn: ≤1.0%, P: ≤0.05%, S: ≤0.05%, Cr: 13%, Ni: 1.0%, Mo: 1.2%, Ti: 0.2%, V: 0.2%, Cu: 0.5%, RE: 0.05%, and the rest is Fe. The hardness after heat treatment in this embodiment is HRC58-59.8.

[0029] According to the composition requirements, the raw material ratio is selected, and the smelting and casting are carried out in an intermediate frequency induction electric furnace to obtain the required blanks, and then heat treatment, turning, grinding and other processing are carried out to manufacture the side extrusion rolls for welde...

Example Embodiment

[0031] Example 2

[0032] The shape of implementation 2 is shown in Figure 2. A set of two upper squeeze rolls for welded steel pipes with Ф273.1 are manufactured according to the use of the present invention using the casting production process. The components are selected from the following high chromium steel components (by weight percentage): C: 0.9%, Si : ≤1.0%, Mn: ≤1.0%, P: ≤0.05%, S: ≤0.05%, Cr: 10%, Ni: 0.5%, Mo: 0.8%, Ti: 0.3%, V: 0.5%, W: 0.3%, RE: 0.015%, the rest is Fe.

[0033] According to the composition requirements, the raw material ratio is selected, and the smelting and casting are carried out in an intermediate frequency induction electric furnace to obtain the required blank, and then heat treatment, turning, grinding and other processing are carried out to manufacture the upper squeeze roll for welded steel pipe.

[0034] Example 2 is an upper squeeze roll for welded steel pipes, the weight of the blank is 91.6 kg / piece, the weight of the finished product is...

Example Embodiment

[0035] Example 3

[0036] The shape of implementation 3 is shown in Figure 3. According to the casting production process of the present invention, a set of two lower rolls for 500×500mm welded rectangular steel pipes are manufactured. The components are selected from the following high chromium iron components (in weight percentage): C: 2.8%, Si: ≤1.0%, Mn: ≤1.0%, P: ≤0.05%, S: ≤0.05%, Cr: 22%, Ni: 2.5%, Mo: 2.0%, Ti: 0.1%, V: 0.3%, Cu: 0.5 %, RE: 0.1%, the rest is Fe.

[0037] According to the composition requirements, the raw material ratio is selected, and the smelting and casting are carried out in an intermediate frequency induction electric furnace to obtain the required blanks, and then processing, grinding and other processing are carried out to produce the lower rolls for welding rectangular steel pipes.

[0038] Example 3 is a lower roll for 500×500mm welded rectangular steel pipes, the weight of the blank is 3513kg / piece, the weight of the finished product is 2780kg / pi...

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Abstract

The invention provides a cast high chrome iron or cast high chrome steel roller used to roll weld steel tube and on straight-slim welding steel tube roller, or the like, wherein the cast high chrome iron roller comprises C in 1.8-2.8%, Si <=1.0%, Mn <=1.0%, P<=0.05%, S<=0.05%, Cr in 12-22%, Ni in 0.5-3.0%, Mo in 0. 0%, Ti in 0-0.3%, V in 0-1.0%, Cu in 0-1.0%, RE in 0.01-0.5%, and the left is Fe. The inventive roller has uniform organism, high abrasion resistance and flexibility, while its service life is 2-5 times of general product and material utilization can reach 70% or 80%, with low cost.

Description

technical field [0001] The invention relates to a cast roll, in particular to a cast high-chromium iron or cast high-chromium steel roll for rolling welded steel pipes. Background technique [0002] The roll is the main component with the largest consumption in the production of welded steel pipe. The quality and life of the roll directly affect the quality and production efficiency of the welded steel pipe. The rolls are in direct contact with the rolled piece and complete the entire rolling process. While bearing the effect of relatively large compressive stress, it also has to bear rolling and sliding friction, and some are also affected by severe cooling and heat, so they are severely worn and need to be replaced frequently. [0003] At present, the welded steel pipe rolls that represent the international advanced level are forged rolls made of alloy tool steel with the grades X165CrMoV12 or X155CrMoV121 produced in Germany, X165CrMoV12KU produced in Italy, D2 produced ...

Claims

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Application Information

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IPC IPC(8): B21B27/00C22C37/08C22C38/50C22C38/46C22C38/44C22C38/40
CPCC22C38/56C22C38/005C22C38/44
Inventor 袁厚之张凝刘行一王平
Owner SHANDONG PROVINCE SIFANG TECHN DEV
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