Production method of high-carbon martensitic stainless steel steckel mill

Abstract

The invention discloses a production method of a high-carbon martensitic stainless steel steckel mill, and relates to high-carbon steel produced by the steckel mill and a production process of the high-carbon steel. The process technology focuses on overcoming the defects of decarburization, peeling, edge cracking, layering and the like of high-carbon martensitic stainless steel, the defects of decarburization, peeling, edge cracking, layering and the like of the high-carbon martensitic stainless steel caused by long rolling time of the steckel mill are effectively overcome by controlling the tapping temperature, heating furnace residual oxygen, pass reduction, vertical roll rolling force, a descaling system and other processes, and the surface quality and the yield are improved.

Description

technical field [0001] The invention belongs to the technical field of plate processing, and in particular relates to a production method of a high-carbon martensitic stainless steel steckel rolling mill. Background technique [0002] At present, Cr13 type martensitic stainless steel is the most used in the manufacture of knives, such as 20Cr13, 30Cr13, 40Cr13, etc. These steel types have relatively high hardness. For example, the hardness of 20Cr13 after heat treatment can reach HRC48-52, and the hardness of 30Cr13 and 40Cr13 It can reach above HRC53. With the increase of users' demand for hardness, the hardness of low-carbon stainless steel cannot meet the needs of high-end users. As high-end 50Cr15MoV, 50Cr13, 60Cr13 have high carbon content, due to the high carbon content, the production time of the steckel mill is relatively long, and the requirements for equipment status and process parameters are relatively high in the production process, and a slight deviation in con...

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Problems solved by technology

[0002] At present, Cr13 type martensitic stainless steel is the most used in the manufacture of knives, such as 20Cr13, 30Cr13, 40Cr13, etc. These steel types have higher hardness, such as 20Cr13 after heat treatment, the hardness can reach HRC48-52, 30Cr13, 40Cr13 hardness It can reach above HRC53. With the increase of users' demand for hardness, the hardness of low-carbon stainless steel cannot meet the needs of high-end users

As high-end 50Cr15MoV, 50Cr13, 60Cr13 have high carbon content, due to the high carbon content, the production time of the steckel mill is relatively long, and the requirements for equipment status and process parameters are relatively high in the production process, and a slight deviation in control will lead to decarburization and peeling , edge cracks, delamination and other defects seriously affect the strip surface quality and yield

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