High-strength and high-ductility power station fin material and processing technology thereof

Abstract

The prepared material is composed of a core material and a skin material, and the core material alloy is prepared from 0.7 wt%-1.0 wt% of Si, 0.3 wt%-0.6 wt% of Fe, 1.3 wt%-1.8 wt% of Mn, 1.3 wt%-1.6wt% of Zn, 0.1 wt%-0.2 wt% of Zr and the balance aluminum and inevitable impurity elements; the skin material alloy comprises, by weight, 6.8%-7.8% of Si and the balance aluminum and inevitable impurity elements. According to the chemical components, a composite aluminum strip obtained through the procedures of fusion casting, saw cutting, surface milling, compounding, heating, hot rolling, cold rolling, annealing, tension leveling and slitting has the forming performance, the strength and corrosion resistance after brazing are superior to those of a composite aluminum strip material with 3003as the core material, and the use requirement of fins for brazing of a power station cooling system is met.

Description

technical field [0001] The invention relates to the technical field of multi-layer metal materials and processing thereof, in particular to a high-strength and high-ductility power station fin material and a processing technology thereof. Background technique [0002] The complete set of cooling system equipment of the power station is mainly used to cool the exhausted steam discharged from the steam turbine into condensed water. The pressure difference formed by the cooling of the exhausted steam makes the steam generate thrust, which drives the rotation of the steam turbine and drives the generator to generate electricity. Therefore, the cooling system of the power station is an important production equipment of the power station. Water cooling uses water as the cooling medium, uses the temperature rise of water to take away heat, and cools (condenses) the cooled medium. It is the earliest application in the cooling system of thermal power plants in China, and it is also th...

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Problems solved by technology

[0002] The complete set of cooling system equipment of the power station is mainly used to cool the exhaust steam discharged from the steam turbine into condensed water. The pressure difference formed by the cooling of the exhaust steam makes the steam generate thrust, drives the turbine to rotate, and drives the generator to generate electricity. Therefore, the cooling system of the power station is an important production equipment of the power station. Water cooling uses water as the cooling medium, uses the temperature rise of water to take away the heat, and cools (condenses) the cooled medium. It is the earliest application in the cooling system of thermal power plants in China, and it is also the most widely used cooling method. Its main advantages The reason is that the power station has a high rate of full power, but the disadvantage is that it consumes a lot of water. As the country pays more attention to the protection of fresh water resources, and the layout of thermal power in China is concentrated in the "Three North" areas where fresh water resources are scarce, the future air cooling system will be used in the "Three North" areas. Playing a major role, the proportion of air-cooling systems used in newly-commissioned thermal power stations will also be further increased. Although the scale of coal-fired power plants is declining, the demand for air-cooling systems in power stations will rise steadily. Therefore, the use of high-performance aluminum alloy power station fins Research and development is also the general trend. The existing power station fins use ordinary 3003 as the core material, which has low strength after welding and poor corrosion resistance. Therefore, it is necessary to design a high-strength and high-ductility power station fin material and its processing technology to solve the problem. above question

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