A near isothermal rolling device and method thereof

Abstract

The invention relates to a near-isothermal rolling device and a method thereof. The device comprises a rolling mill main body, a heating furnace, a holding furnace, a slab temperature measurement component, a slab temperature compensation component, a roll temperature measurement component, a roll heating component and a roll compensation component. The heating furnace and the holding furnace are arranged at the inlet and outlet ends of the main body of the rolling mill; the slab temperature measuring component is arranged at the outlet of the heating furnace and the inlet side of the holding furnace; the slab warming component is arranged at the slab inlet , the upper and lower ends of the outlet side; the roll temperature measuring components are arranged on the left and right sides of the upper and lower work rolls; the roll heating components are arranged on both sides of the outer ends of the upper and lower work rolls; the roll temperature compensation components Installed on the inlet and outlet sides of the upper and lower work rolls. The invention can carry out electromagnetic induction heating to the upper and lower work rolls, realize isothermal rolling zone or roll isothermal, heat the slab before rolling and supplementary heating after rolling, and finally achieve heating and heat preservation of metal materials with a relatively small suitable rolling temperature range. And reciprocating rolling.

Description

technical field [0001] The invention relates to the technical field of steel rolling in the metallurgical industry, in particular to a near-isothermal rolling device and a method thereof. Background technique [0002] With the rapid development of aerospace, automotive electronics and other fields, the manufacturing industry has put forward higher requirements for its product materials. Titanium and titanium alloys have become the next generation due to their excellent corrosion resistance, lightweight structural characteristics, high performance, and low cost. The "strategic metal" after steel and aluminum. However, due to the poor plasticity of titanium alloys, the small amount of deformation in the pass, and the strict temperature control required in the rolling process, the precision rolling of such metals is difficult. In response to this problem, different control methods have been used to heat the rolling mill at home and abroad, including flame heating, fluid heatin...

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Problems solved by technology

[0003] The above technologies all have different technical limitations: although flame heating can increase the temperature of the roll surface, it is difficult to control the flame accurately, and the environmental pollution caused by flame heating cannot be ignored; although fluid heating can achieve relatively uniform roll heating, due to The temperature of the thermal fluid is usually about 200°C, and the heat it can provide to the roll is always limited, and the stiffness of the roll is reduced due to the arrangement of the thermal fluid channel; rolling preheating is a common preheating method at present, but due to its preheating The process is relatively slow, which reduces the production cycle of metals in the narrow suitable rolling temperature range; although induction heating can realize the induction heating of the roll in a short time, but the external induction heating is the same as the flame heating, it is difficult to achieve uniform roll surface temperature control, and the built-in Induction heating reduces roll stiffness as does fluid heating

In addition, due to the high temperature of the roll, the heat transferred from the roll to the rolling mill cannot be ignored, which will often cause local overheating of the rolling mill, and further thermal expansion will seriously affect the use of equipment

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