Method of Improving Low Temperature Toughness of Materials Based on tscr Dynamic Variation Rules

A low-temperature toughness and variable-schedule technology, applied in temperature control, manufacturing tools, metal rolling, etc., can solve problems such as brittle fracture and high-strength strips that cannot be fully utilized, so as to promote transformation, shorten product production cycle, and promote The effect of comprehensive utilization

Active Publication Date: 2020-09-29
YANSHAN UNIV
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Problems solved by technology

According to the research of relevant experts, when the metal material is used under low temperature conditions, when it tends to a certain temperature threshold, the low temperature toughness of the material will drop rapidly, and brittle fracture is prone to occur. Due to the brittleness of the material, the high-strength strip underutilized

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  • Method of Improving Low Temperature Toughness of Materials Based on tscr Dynamic Variation Rules
  • Method of Improving Low Temperature Toughness of Materials Based on tscr Dynamic Variation Rules
  • Method of Improving Low Temperature Toughness of Materials Based on tscr Dynamic Variation Rules

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specific Embodiment

[0032] The temperature process is as Figure 4 shown. The exit temperature of continuous casting is 1500°C, the exit temperature of the strip passing through the third stand of the rough rolling unit is 950°C, the temperature is raised to 1150°C by induction heating, and the strip is rolled by the five-stand finish rolling unit, and finally the strip is passed through the finish rolling unit The temperature of the final stand is 850°C, and the laminar cooling temperature drops to 200°C. When the rolls of a certain stand of the finishing mill are seriously worn and need to be replaced, the finishing mill is in the process of "5-1" dynamic change schedule. After the process, Turn on the online tempering, the roll changing mill will directly exit the rolling and carry out online non-stop roll changing, the finishing rolling unit will change from the original five-stand finishing rolling unit to a four-stand finishing rolling unit, and the online tempering treatment will be carrie...

Embodiment

[0036] A method for improving the low-temperature toughness of materials based on TSCR dynamic variable rules. After continuous casting of strips at 1500°C, the exit temperature of the strips after passing through the third stand of the roughing mill is 950°C. The final stand temperature of the finishing mill is 850°C, and the laminar cooling temperature drops to 200°C. When a roll of a stand of the finishing mill is severely worn and needs to be replaced, the finishing mill will carry out During the "5-1" dynamic schedule change process, after the process, the online tempering is turned on, the roll changing mill directly exits rolling and performs online non-stop roll changing, and the finishing rolling unit is changed from the original five-stand finishing rolling unit to four. The rack finishing unit is subjected to on-line tempering treatment, the on-line tempering temperature is raised to 620°C, kept for 40s, and then air-cooled for crimping.

[0037] The exit temperatur...

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Abstract

The invention discloses a method for improving the material low-temperature toughness based on TSCR dynamic variable regulation. In and after the process that '5-1'dynamic variable regulation is conducted through a finishing mill group, online tempering is started, '5-1' dynamic variable regulation of the finishing mill group is combined with online tempering, the microstructure of a material is significantly affected in a short time, waste energy resources such as waste heat and waste pressure of a rolled strip can be effectively utilized and combined with online tempering in the low-temperature waste heat stage, structural phase transition is freely controlled, the production process is simplified, energy consumption is reduced, best strength and toughness match is achieved, comprehensive utilization of secondary energy such as the low-temperature waste heat is promoted, and the purposes of energy saving, consumption reducing and environmental protection are achieved; and meanwhile,a strategic cooperation mechanism between steel enterprises and users can be established, transformation of the steel enterprises from producers to service providers is promoted, regional manufacturing enterprise industrial upgrading accelerating is improved, joint reorganization of a rolling process and a heat treatment technology is realized, and great prospects in industrial application are achieved.

Description

technical field [0001] The invention belongs to the field of iron and steel material engineering, and relates to a method for improving low-temperature toughness of materials, in particular to a method for improving low-temperature toughness of materials based on TSCR dynamic variation rules. Background technique [0002] As an important symbol of the level of national economic development and economic strength, the iron and steel industry is facing enormous challenges brought about by the contradictions between production capacity and resource supply, energy consumption, and environmental load. Major production enterprises continue to adopt new processes and technologies to economically produce high-strength, high-plasticity, high-toughness, and long-life steel materials. [0003] As a result, the thin slab continuous casting and rolling technology TSCR upgrade was born. TSCR technology is known as the "third technological revolution" in the development of the international...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/46B21B37/74B21B45/02B21B15/00
CPCB21B1/463B21B15/00B21B37/74B21B45/0203
Inventor 彭艳刘才溢王双檑崔金星张敏杨彦博
Owner YANSHAN UNIV
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