Method for producing 75Cr1 hot-rolled sheet steel

A technology of hot-rolled steel sheet and production method, applied in metal rolling, temperature control and other directions, can solve the specific solution method that does not mention 75Cr1 preparation technology and method, does not mention key technical problems, does not mention alloy tool steel technical and method issues, to achieve the effect of high pulling speed, moderate viscosity bulk density and high carbon content
CN101745535AInactive Publication Date: 2010-06-23GUANGZHOU PEARL RIVER STEEL & IRON
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGZHOU PEARL RIVER STEEL & IRON
Publication Date
2010-06-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for producing high-quality 75Cr1 hot-rolled sheet steel based on the continuous thin slab casting and rolling process, which mainly adopts the following process flow: smelting, refining, continuous thin slab casting, soaking, hot continuous rolling, cooling and coiling. The superheat T of molten steel is larger than 30 DEG C and less than or equal to 45 DEG C, the charging temperature T of the cast slab is larger than or equal to 900 DEG C and less than or equal to 1050 DEG C, the finish rolling temperature T is larger than or equal to 850 DEG C and less than or equal to 950 DEG C, the coiling temperature T is larger than or equal to 550 DEG C and less than or equal to 630 DEG C, and the drawing speed S of continuous casting is larger than or equal to 3.5m / min and less than or equal to 5.5m / min; mold flux casting is adopted; and the chemical composition of molten steel is as follows: 0.70 percent to 0.80 percent by weight of C, 0.20 percent to 0.45 percent by weight of Si, 0.60 percent to 0.90 percent by weight of Mn, 0.025 percent by weight or less of P, 0.025 percent by weight or less of S, 0.30 percent to 0.60 percent by weight of Cr and 0.02 percent to 0.08 percent by weight of V. When the method is adopted to produce the 75Cr1 hot-rolled sheet steel, the segregation, porosity and cracks of the cast slab are reduced, and the 75Cr1 hot-rolled sheet steel is characterized by uniform microstructure and properties and high fatigue resistance.
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Description

technical field

[0001] The invention belongs to the technical field of alloy tool steel production, and is particularly suitable for a method for producing 75Cr1 hot-rolled steel plates by adopting thin slab continuous casting and rolling processes. technical background

[0002] Alloy tool steel 75Cr1 has high hardness, toughness, and wear resistance. It is mainly used in the manufacture of high-end high-grade alloy tools, including high-precision circular saw blades, special tools / cutters, and special springs.

[0003] Due to the characteristics of the above-mentioned application fields, the material must have certain properties, not only a certain strength, but also not too soft, which is comprehensively reflected in the need for sufficient hardness; another important feature of the substrate is that it is subject to strong vibration during use. . From the perspective of the use requirements of the matrix and the actual situation, the technical parameter requirements of t...

Claims

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