Suzhou Xinlilai Precision Optical Components Co., Ltd. specializes in Suzhou Lin Long Precision Hardware Factory, and its business scope covers stainless steel, stainless steel, carbon steel annealing, demagnetization, tempering, solid solution, aging, bright quenching, brazing, stainless steel, copper, stainless steel, special oxidation blackening, extinction blackening, matte black treatment, steel cleaning, polishing and grinding, and electroless nickel plating on steel and aluminum. Digital camera, mobile phone, automobile, stainless steel for monitoring lens, copper shading sheet manufacturing, special process extinction and blackening treatment, QPQ treatment, complex quenching and deformation-free heat treatment of precision hardware and molds (deformation can be controlled within 4UM), hardware, turning parts, fasteners, powder metallurgy quenching, carburizing, annealing and tempering, sulfur nitriding, gas nitriding, salt bath nitriding, oxidation blackening, salt bath quenching, high frequency, etc. 1, the oxidation blackening of stainless steel copper conforms to the national standard SGS, the American standard MIL-C- 13924, the appearance and corrosion resistance conform to the national standard GB/T 155 19-2002, and the weapon industry standard WJ535-82 and German standard. Wear resistance: superior to Q/OJS00 1- 1995 standard. Products are used in medical devices, key mechanical parts, military machinery and sports equipment. 2. Compound hardening treatment is mainly used for surface hardening and corrosion protection of precision electronics and hardware. The characteristic of this technology is that it can handle electronic components, hardware and molds with high precision and easy deformation, and the deformation of mechanical parts can be controlled within 4um, so it is a technology with no deformation hardening and strong corrosion resistance. 3. Digital cameras, mobile phones, car monitoring lenses, etc. Made of stainless steel and copper shading sheet, with dimensional tolerance of 0.005MM and concentricity of 0.01mm, developed and manufactured by Japanese high-tech technology, made of ultra-thin stainless steel and copper. The shading sheet is subjected to special optical dyeing and extinction treatment through special technology, with good conductivity, light tightness, double-sided frosting, accurate size, good mechanical properties and heat resistance. Stainless steel and copper lenses are mainly used for precision lenses with more than 3 million pixels. It is an essential product for high-definition lenses in the future and an ideal upgrade product for PE products. 4.QPQ adopts the latest technology in the United States, and the products are free from sandblasting and deformation, with excellent appearance, greatly improved wear resistance and corrosion resistance, and excellent quality, leading the industry. 5. Especially copper blackening, stainless steel blackening and QPQ salt bath processing all adopt the latest technology of our company, with low cost and excellent quality, and the processing cost is 20-80% lower than that of the same industry. Our products have been exported to America, Germany, Japan, Korea and other overseas countries. 6. All kinds of hardware and fasteners are sandblasted, and die castings are shot peened and polished, selling blackening agents and blackening salts for stainless steel, copper and aluminum. Provide free proofing. Process introduction 1. Process introduction "QPQ" is the abbreviation of English "Quench-P0 Lish-Quench". The original meaning is quenching, polishing and quenching. After salt bath compound treatment, in order to reduce the roughness of the workpiece surface, the workpiece surface can be polished once and then oxidized once in salt bath, which is very necessary for precision parts and workpieces with high surface roughness requirements. It is called QPQ salt bath compound treatment technology in China. QPQ salt bath compound treatment technology can greatly improve the wear resistance and corrosion resistance of metal surface, and the workpiece is hardly deformed, which is a new technology for strengthening and modifying metal surface. This technology realizes the combination of nitriding process and oxidation process; Nitride and oxide compounds; Combination of wear resistance and corrosion resistance; Combination of heat treatment technology and anticorrosion technology. QPQ salt bath composite treatment technology was invented by German company in 1970s. After decades of continuous development and improvement, its application scope is getting wider and wider. Therefore, it is regarded as a great progress in the field of metal surface strengthening technology abroad and is called a new metallurgical method. At present, QPQ salt bath compound treatment technology has been widely used in China, especially in automobiles, motorcycles, shaft products, electronic parts, textile machinery, machine tools, electrical switches and molds. Second, the technical characteristics: 1, the wear resistance is good. In the process of QPQ, the metal material reacts with the salt bath at the working temperature of 570 10℃, and a dense and high-quality compound layer can be formed on the metal surface. The compound is completely composed of ε iron nitride, which can effectively improve the hardness and compactness of the metal surface and make the metal surface have good wear resistance. The surface hardness of the treated metal material mainly depends on the alloying elements in steel. The higher the content of alloying elements, the higher the hardness of carburized layer. According to the hardness of the infiltrated layer, the commonly used materials can be divided into the following categories: (1) carbon steel and low alloy steel, and the representative steel grades are 20, 45, TiO, 20Cr, 40Cr, etc. Hardness of carburized layer: 500-700 HV (2) Typical steel grades of alloy steel: 3CrW8V, Crl2MoV, 38CrMoAl, 1crl3-4cr 13, etc. Surface hardness of carburized layer: 850- 1000 HV (3) Typical steels of high-speed steel and austenitic stainless steel: quenched Wl8Cr4V, W6Mo5Cr4V2 and1Cr18Ni9Ti:1000-1250 HV. 500HV below shows the sliding wear test data of 40Cr material after different treatments. Based on the wear value of QQQ of 0.22mg, the wear resistance of QQQ process is 2. 1 times that of hard chromium plating, 2.8 times that of ion nitriding, 23.7 times that of high frequency quenching and 29.4 times that of conventional quenching. 2. Good corrosion resistance The following picture shows the comparison of neutral salt spray tests between 45# steel and 1Cr 18Ni9Ti stainless steel and 1Cr 13 materials after QPQ salt bath composite process, decorative chromium plating, hard chromium plating and common blackening treatment. It can be seen that the corrosion resistance of 45# steel after QPQ treatment is 5 times that of 1Cr 18Ni9Ti stainless steel, 70 times that of hard chromium plating and 280 times that of common blackening. The neutral salt spray test of other materials after QPQ process can reach 100-300 hours. 3. Good fatigue resistance. The metal surface treated by QPQ salt bath composite process introduces and produces high residual compressive stress, which greatly improves various types of fatigue strength. Experiments show that the fatigue strength can be increased by about 65,438 0,000%, and surface defects such as pitting and corrosion can be alleviated. 4. QPQ salt bath compound treatment technology with minimal deformation will not change the microstructure below the transformation point of steel because of the low process temperature. Therefore, compared with hardening processes such as quenching, high frequency quenching, carburizing quenching and carbonitriding, the deformation of the treated workpiece is much smaller. At the same time, after nitriding at 570-580℃, the workpiece should be kept at 350-400℃ 15-20min, which will greatly reduce the thermal stress generated when the workpiece is cooled. Therefore, QPQ salt bath compound process is the least deformation quenching process, which can effectively solve the quenching deformation problem that is difficult to be solved by conventional heat treatment methods. 5. Low carbon and environmental protection The German company Digosa, which invented this technology, won the German Environmental Protection Award for this technology. In China, QPQ treatment process has been tested and identified by relevant environmental protection departments, and it has been proved by the actual use of users all over the country that it is pollution-free, pollution-free and heavy metal-free. Used to replace electroplating and other processes with serious pollution. 6. It can replace multiple processes and reduce the time cost. The hardness, wear resistance and corrosion resistance of metal materials can be improved by QPQ salt bath composite process, so it can replace conventional quenching (ion nitriding, high frequency quenching, etc.). ), tempering, blackening (chromium plating) and other processes, greatly shortening the production cycle and reducing the production cost. A large number of production data show that QPQ treatment saves energy by 50% compared with carburizing and quenching, and saves cost by 30% compared with hard chromium plating, with high cost performance. Third, the scope of application (II), stainless steel blackening
Stainless steel blackening can be divided into three types: low temperature blackening, extinction blackening and high temperature blackening.
1. The product quality of stainless steel blackening process at low temperature is superior to that of the same industry. The blackened film of the treated workpiece is firm, with good adhesion, deep oil seal and certain wear resistance. It meets the national standard GB/T 155 19, but it is not comparable to high temperature.
2. The extinction and blackening process of stainless steel is treated by a special method, so that the workpiece gets a matte and non-reflective black oxide film. The blackening film has strong adhesion, firmness, no ash hanging and good wear resistance, which conforms to the military standard WJ 1535-82. Widely used in precision optical equipment and components such as lenses, lens barrels and lens shading sheets.
3. Stainless steel has excellent high-temperature blackening effect, good corrosion resistance and wear resistance, and the bonding force of blackening film is very firm. The surface layer of the treated workpiece has wear resistance, friction reduction, scratch resistance, bite resistance, fatigue resistance, corrosion resistance and self-lubrication. It conforms to the national standard SGS, GB/T 155 19, military standard WJ535-82, German standard DIN50938 and American standard MIL-C- 13924.
(3), copper blackening
Copper blackening can be divided into general blackening and optical blackening.
Generally, blackening of copper can make a dark or antique oxide film on the surface of copper, and the blackening film has good adhesion. The optical blackening process of copper and the optical blackening process developed by our company have the characteristics of uniform blackening film, strong adhesion, good wear resistance, deep oxide film, dull black and no reflection. , all meet the requirements of optical components. Our company's optical blackening process is suitable for copper blackening of various materials.
(4), aluminum surface treatment is divided into alumina black, color oxidation, natural color oxidation. The anodized blackening film of aluminum is dark, firm and uniform, and the colored oxidation is bright, uniform and firm, and the colored oxidation is bright and colorless.
(5), carburizing
The carburizing speed is related to the kind and content of alloying elements in steel and working temperature. The steels such as 20A, 20cr/20crMNTi were carburized at 930℃ 10℃ 1 hour, and the depth of carburized layer was 0.4 ~ 0.6 mm, and it was 0.7~ 1.0mm after 2 hours. The penetration rate of steel containing nickel alloy is twice as slow. General hardness: HRC40~63.
(6) Bright, demagnetized and brazed steel.
The bright demagnetization treatment of iron and steel parts is heat treatment by using atmosphere to protect vacuum state, and the surface of the workpiece is bright, anti-corrosive and non-magnetic. Brazing uses copper, tin and other media to melt and weld under high temperature and vacuum.
(7), carbon steel and alloy steel chromizing, salt bath quenching treatment
Chromium nitride carbonized layer is obtained on the surface of workpiece, which has high strength, high hardness, high wear resistance and corrosion resistance. The infiltrated layer is about 5~20mm, the hardness is about HV 1400~2000, and HRC is 45 ~ 60.
(8), sandblasting, shot blasting and polishing
Surface polishing of various steel parts, automatic and manual sandblasting (using glass beads and diamond sand) according to process requirements to obtain bright, frosted and rough surface (suitable for anti-skid, gluing and gluing), shot blasting polishing (using stainless steel ball sand), shot blasting polishing, deburring and oxide film removal of die castings are carried out by automatic shot blasting machine.
The above business can be processed according to customer requirements, with short delivery time and free proofing. We sincerely welcome technical consultation and cooperation.