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Method for improving quality inside forging material through flat square cogging

A quality control method and flat square technology, applied in the field of metallurgical manufacturing, can solve the problems of not meeting the requirements of high-level flaw detection and poor quality, and achieve the effect of dense internal structure, internal quality improvement, and increased deformation

Inactive Publication Date: 2019-11-15
建龙北满特殊钢有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the internal quality of the 30CrMnSiAΦ260mm round billet produced by the existing continuous casting billet is poor and cannot meet the requirements of high-level flaw detection, and to provide a method for improving the internal quality control of the forging material by slab opening

Method used

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  • Method for improving quality inside forging material through flat square cogging
  • Method for improving quality inside forging material through flat square cogging
  • Method for improving quality inside forging material through flat square cogging

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specific Embodiment approach 1

[0020] Specific implementation mode one: combine figure 1 Describe this embodiment, a method for improving the internal quality control of forging materials by flat billeting in this embodiment, including the following steps:

[0021] Step 1. Forge the 30CrMnSiA Φ550mm continuous casting slab to form a rectangular billet, send the Φ550mm continuous casting slab into the heating furnace to keep warm at 1180-1200°C for 2 hours, and then use the forging process to forge the Φ550mm continuous casting slab to form a rectangular billet;

[0022] Step 2, rotating the primary rectangular blank obtained in step 1 by 90°, and performing forging to obtain a primary square blank;

[0023] Step 3, forging the primary square blank obtained in step 2 to form a secondary rectangular blank;

[0024] Step 4, rotating the secondary rectangular blank obtained in step 3 by 90°, forging to obtain a secondary square blank;

[0025] Step five, rounding the quadratic square blank obtained in step fo...

specific Embodiment approach 2

[0026] Specific implementation mode two: combination figure 1 Describe this embodiment, a method for improving the internal quality of forging materials by slab opening in this embodiment. First, forge a 30CrMnSiA Φ550mm continuous casting billet to form a rectangular billet, and then send the Φ550mm continuous casting billet into a heating furnace for heat preservation at 1180-1200°C , keep warm for 2 hours, and then use the forging process to forge the Φ550mm continuous casting billet to form a rectangular billet. The thickness of the square blank is 430mm; the obtained primary square blank is forged again to form a secondary rectangular blank, and the thickness of the secondary rectangular blank is 300mm; then the obtained secondary rectangular blank is rotated 90° and forged to obtain a secondary square blank The blank, the thickness of the secondary square blank is 400mm, and the final secondary square blank is rounded to form a 30CrMnSiA material round blank with a speci...

specific Embodiment approach 3

[0031] Specific implementation mode three: combination figure 1 Describe this embodiment, a method for improving the internal quality of forging materials by slab opening in this embodiment. In step 1, the forging pressure for forging a Φ550mm continuous casting billet to form a rectangular billet is 30KN.

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Abstract

The invention discloses a method for improving the quality inside a forging material through flat square cogging, and belongs to the technical field of metallurgical manufacturing. The invention aimsto solve the problems that a 30CrMnSiA phi 260mm round billet manufactured by the existing continuous casting billet has poor internal quality and cannot meet the requirement of high-grade flaw detection. The method comprises the steps of S1, forging a 30CrMnSiA phi 550mm continuous casting billet into a rectangular square billet; S2, forging the billet obtained in S1 to obtain a primary square billet; S3, forging and pressing the primary square billet obtained in S2 to form a secondary rectangular billet; S4, rotating the secondary rectangular billet obtained in S3 by 90 degrees, and forgingto obtain a secondary square billet; and S5, rounding the secondary square billet obtained in S4 to form a 30CrMnSiA material round billet with the specification of phi 260 mm. The round billet obtained by the method of the invention has better improvement on the internal quality of the product, and can achieve the effect of compact internal structure under the condition of smaller processing.

Description

technical field [0001] The invention relates to a method for controlling the quality of a round billet forging material, which belongs to the technical field of metallurgical manufacturing. Background technique [0002] 30CrMnSiA is a medium-carbon low-alloy wear-resistant cast steel. It is a new type of wear-resistant steel developed at home and abroad. It has low production cost, high hardness and good wear resistance, and is suitable for working under non-strong impact conditions. However, due to the poor toughness of this type of steel, its scope of use is limited. However, 30CrMnSiA has high strength and sufficient toughness after quenching and tempering, and its hardenability is also good. After quenching and tempering, the material can be used for grinding wheel shafts, gears, and sprockets. At the same time, 30CrMnSiA has good processability, small processing deformation, and good fatigue resistance. It is used for shafts, pistons, etc. spare parts. Used in various...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/06
CPCB21J5/002B21J5/06
Inventor 吴虎男翟书研
Owner 建龙北满特殊钢有限责任公司
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