At present, QPQ surface modification technology in China has been widely used, especially in the automotive, motorcycle, textile machinery, machine tools, electrical switches, dies and the use effect is very prominent. The following specific characteristics:
1 good wear resistance, fatigue resistance
This technology can greatly improve the hardness and wear resistance of various black metal parts of the surface, lower friction coefficient. Products through QPQ processing, wear resistance than conventional quenching, high frequency hardening is more than 16 times higher than that of 20# steel after carburizing and quenching, more than 9 times higher, than the hard chromium plating and ion nitriding is more than 2 times.
Fatigue test shows: this method can make the fatigue strength of medium carbon steel is increased by more than 40%, than the ion nitriding, gas nitriding effect is good. The process is especially suitable for the complex shape parts, the key technology to solve the problem of distortion, be smoothly done or easily solved.
2 good corrosion resistance
For different materials, different processing samples according to test conditions the same, according to ASTMBll7 standard continuous spray test, salt spray test temperature 35 ± 2 ℃, relative humidity > 95%, 5%NaCL water solution spray. The test results show that, after QPQ treatment the corrosion resistance of part is 5 times that of 1Crl8Ni9Ti stainless steel, is 70 times the hard chromium plating, is 280 times the blackening.
After the 3 products processing small deformation
The workpiece after QPQ treatment almost no deformation, can be hardened to solve the deformation problem of conventional heat treatment method. For example: the size of 510 * 460 * 1.5mm 2Cr13 stainless steel sheet after a QPQ process, the surface hardness is greater than HRC60, roughness of less than 0.5mm. At present, the QPQ technology is very successful in many shaft parts, slender rod applied, effectively solves the contradiction of heat treatment hardening and product has deformation.
4 can be multi-channel process of heat treatment and corrosion process, short time period
The workpiece after QPQ treatment, improve its corrosion resistance in the basis of improving the hardness and wear resistance at the same time, and the formation of black, beautiful appearance, can replace the conventional quenched and tempered a black (chrome plated) and other processes, shorten the production cycle, reduce the cost of production. A large number of production data show that, QPQ can be 50% energy saving compared with the carburizing and quenching, than the hard chromium plating cost savings of 30%, high performance price ratio.
5 non pollution level is high, no environmental pollution
QPQ treatment process by the relevant environmental protection department of detection and identification, and the actual use proof of users all over the country, all kinds of harmful substances emissions are lower than the national emission standard permissible value. Because of advanced technology, stable quality, the application of QPQ technology products have hundreds of, has established a number of production lines in the country.
The range of 6 QPQ technology suitable for material widely
The process is suitable for all ferrous metals, from pure iron, low carbon steel, structural steel, tool steel, high alloy steel, stainless steel, to a variety of cast iron and iron base powder metallurgy parts.

Su's heat treatment Co. Ltd. was founded in 1990, after decades of development, scale is continually expanding, is located in Shajing Town Baoan District Shenzhen City Bridge second industrial zone, covering an area of 3000 square meters, the main business is to take all the metal, alloy steel, beryllium copper, heat treatment of high speed steel, cryogenic treatment (-196 C), nitrogen gas, liquid nitrogen, QPQ salt bath production line, high-frequency quenching, blackening and carburizing, the surface of hard and stainless steel processing.
The company is equipped with power of heat treatment technology, established a perfect quality testing equipment, equipped with vacuum quenching furnace, vacuum furnace, pit furnace, furnace, liquid nitrogen atmosphere furnace, rotary furnace, large mesh belt furnace, improve metallographic inspection equipment, material failure analysis, scientific management and complete, rigorous technology, skilled operation.
Company will be excellent quality and perfect service, and actively challenge, satisfy customer demand, has passed ISO9001:2000 in 2003 September (SGS) international quality certification. Has now become a reputable manufacturers.