PC steel bar super audio frequency induction heating equipment heat treatment production line

PC steel bar is the abbreviation of prestressed concrete steel bar. The surface of the steel bar has threads, which can be well adhered to the concrete. The diameter of the steel bar is very thin. It is made of low carbon steel 20Si2Cr and other materials by induction heating with super-audio frequency induction heating equipment. Induction heat treatment production line includes pressure feeder, heating induction coil, quenching chamber, tempering induction coil, straightening machine, cutting machine, etc.

PC steel bar induction heating adopts super-audio frequency induction heating equipment for heating, quenching, tempering and other processes. The heated steel bars should meet the requirements of YB/T 111-1997 "Steel Rods for Prestressed Concrete" and GB/T 5223-2002 "Steel Wires for Prestressed Concrete". Its tensile strength is generally above 1470MPa. Due to the large production volume of the PC~steel bar processing production line, the energy consumption index is an important aspect in evaluating the pros and cons of this production line, in addition to product quality. Japan's Neturen company once adopted the induction resistance heating method, and once reported that per ton of steel bars can save 160kW. h of electricity. The United States Yingda company adopts dual-frequency heating, and its purpose is also to save energy. PC steel bars are mainly used as PC poles, foundation piles, iron cages, etc. The domestic steel wire and steel bar heat treatment production line has gone through many years of research, production and improvement, starting from the concave thread prestressed pipe pile steel wire production line, and developed to stainless steel wire, low-relaxation steel wire and steel strand, elastic steel wire and other varieties of production lines. The composition of the production line has developed from a single line to a double line; the power supply configuration has developed from a combination of thyristor intermediate frequency and electronic tube super-audio induction heating equipment to a combination of thyristor IGBT transistor power supply to achieve the purpose of reducing energy consumption and improving productivity. Pipe pile steel wire heat treatment production line has developed from single-line production to double-line production, and it is necessary to solve the problem of uniform temperature of the two steel wires. In addition to improving productivity, the use of double-line production occupies almost the same area as single-line production, and the plant needs to be expanded; the equipment investment cost is slightly higher than that of single-line production; after accounting by the production unit, 50kW.h of electric energy can be saved per ton of steel. Therefore, double-line production has a broader prospect.

Compared with similar products in the world, the double-line production is advanced. In recent years, there have been many improvements in the heat treatment production line of PC steel bar super-audio frequency induction heating equipment. The heating process has been improved from two stages to three stages. For tire steel wire and thinner spring steel wire, my country has also begun to use super-audio frequency induction heating to replace the polluting process of lead bath heating.