Locking strip and preparation method thereof

Abstract

The invention belongs to the technical field of cast iron, and particularly relates to a locking strip and a preparation method thereof. The method comprises the following steps: weighing steel scrap and steel pins for subsequent use; starting an electric furnace for smelting and firstly putting the steel scrap into the electric furnace; smelting the steel scrap into liquid by the electric furnace and putting the steel pins to obtain a solution; adding a carbon-increasing agent, a silicon-increasing agent, a dechroming agent, a manganese-increasing agent and an anti-oxidizing agent to regulate internal components of the solution; and carrying out casting molding to obtain the locking strip. The locking strip is prepared from the following materials in percentage by mass (percent): 3.8 to 4.0 percent of carbon, less than or equal to 0.05 percent of phosphorus, 0.14 percent of manganese, less than or equal to 0.1 percent of chromium, 1.8 to 2.0 percent of silicon, less than or equal to 0.03 percent of sulphur, and the balance iron. By adopting waste steel pins as the main raw materials, crude iron is replaced by the waste steel pins, so that the using consumption of the crude iron is reduced, and adjustment after smelting of the electric furnace is carried out and the casting is carried out. The production cost is reduced when the material quality of a casting piece product is ensured, and environment protection and energy conservation effects are achieved.

Description

technical field [0001] The invention belongs to the technical field of cast iron, and particularly relates to a lock bar and a preparation method thereof. Background technique [0002] With the enhancement of environmental awareness, people pay more and more attention to the recycling of energy. The use of renewable energy as raw material to produce various types of pig iron castings and civilian locks is of great significance to the foundry industry. However, because the hardness of the existing cast iron material is too high to meet the needs of the lock bar, it is necessary to develop a low hardness or ductile iron material, which is applied to the production of the lock bar or the ductile iron material casting. SUMMARY OF THE INVENTION [0003] In view of the above technical problems, the present invention provides a lock bar and a preparation method thereof, which can be applied to low hardness materials produced by the lock bar. [0004] In order to solve the above...

AI Technical Summary

Problems solved by technology

However, because the hardness of the existing cast iron material is too high to meet the use requirements of the lock bar, it is necessary to develop a low hardness or ductile cast iron material, which can be used in the production of lock bars or ductile iron material castings