As a large enterprise with the largest technology content in the Chinese axle industry, which integrates R&D, manufacturing and sales, Hande has always insisted on technological innovation to lead the development. From the introduction of the Steyr axle technology in 1985 to the rapid localization of MAN technology in 2004, the first export of domestic key automobile assembly technology in 2007 has achieved a breakthrough in China's automobile manufacturing industry from product exports to technology exports, and by 2009 Won the "China's Independent Innovation Automobile Enterprise Award"; from 2011 Product Laboratory through the National CNAS Laboratory Certification to the establishment of the Axle Joint Research Center and the expansion of the National Laboratory Project in cooperation with Tsinghua University in 2012. Advantages, expanding scientific research, accelerating R&D speed, optimizing spectrum structure, taking the command of the company's transformation and development at the full speed of product upgrades, and advancing toward the grand vision of “becoming a full-scale supplier of axle systems for heavy and medium-sized wheeled vehiclesâ€. . Intensify product research and development, improve the optimized spectrum structure Hande company always adheres to the needs of customers and takes the market as the guide. While satisfying the need for personalized development, it has made great efforts in product customization and serial production; through the development of various series of new products and the experimental model data Establish and improve, continuously optimize product structure and product spectrum, and gradually establish R&D, technology and technology platform for large-scale and customized products, and form three major product platforms for commercial vehicle axles, non-road axles and passenger car bridges. Improve the company's core competitiveness; as of now, the company's main products are: 5.5T-16T steering front axle, 10T-35T wheel side deceleration drive axle, 6.8T-13T single-stage deceleration drive axle, 6.5T-13T steering drive Bridge, 10T-16T trailer axle; products cover more than 1,000 varieties of heavy and medium-sized truck axles, non-road bridges, passenger bridges, trailer axles and other five categories. Its wheel-side deceleration drive axle and single-stage deceleration drive axle have always been in the leading position in the domestic market with its unique technical advantages and superior bearing and transfer ability. The highlights of new products highlight the advantages of innovation and upgrading Based on the improvement of the existing product line, in recent years, Hande has made major breakthroughs in the research and development of domestic high-end heavy truck bridges, passenger bridges, large-tonnage mining axles and new energy axles. In the past two years, more than 150 kinds of new products such as HDZ450 and HDZ457 single-stage decelerating passenger car axles, HDZ469 wheel side deceleration mine driving axles and HDZ233 wheel side deceleration axles have been successfully developed. The new products have increased by 33% year-on-year. Above, with advanced product technology, precise manufacturing process and perfect quality control capability, the company's products have considerable market competition advantages in terms of high reliability, high bearing capacity, light weight, and low noise; the company's passenger car bridge has been fully covered by domestic Mainstream bus market of 12 meters or above; Non-road axle products developed since 2009 have been favored by customers with excellent market performance, and have become the main force in the field of automotive suspension bridges; through the continuous improvement and upgrading of counterweight truck bridge products With integrated design concepts and the use of new materials, new technologies and other advanced methods, the product reliability has been greatly improved, while the lightweighting effect has been remarkable, effectively reducing manufacturing costs and improving product competitiveness. At the same time, the Hande Company has entered the full range of new R&D fields such as electric axles, China Card, and off-highway cranes. Consolidate the advantages of research, production and research resources, and pay attention to the entire product life cycle In 2012, Hande Company established marketing center, cooperated with Tsinghua University to set up the Axle Joint Research Center, and expanded the state-level laboratory project that invested over 100 million yuan. It achieved the pre-product planning, R&D, manufacturing and after-sales service with international technical standards. The process of testing services, at the same time build a scientific research platform combining capital, talent, technology and other resources advantages with “production, research, and research†to fully focus on the entire life cycle of product development; undertake the national 863 scientific research projects and actively carry out research projects. In 2012, the company The number of authorized patents has increased by more than five times year-on-year, forming a number of core technologies with independent intellectual property rights and accelerating the rapid transformation of scientific and technological achievements; at the same time, on August 1, 2012, Hande officially launched the anti-counterfeiting label and the Internet. Inquiries and 400 telephone inquiries are the main contents of the "Handle axle accessory product anti-counterfeiting query system", and further increase the protection of intellectual property rights.
Tungsten carbide roller has characteristics of good wear resistance, high temperature red hardness, thermal fatigue resistance and thermal conductivity and high strength , have been widely used in high-speed wire rod, bar, rebar, seamless steel tubes, etc. Domestic production of tungsten carbide roller materials mostly WC- Co, WC- Co- Ni- Cr two series, and the content of Co, Co- Ni - Cr is in the range of 6wt% ~ 30wt%. From the use of perspective, tungsten carbide rollers has good mechanical properties, its flexural strength up to 2200 MPa or more, shock toughness up (4 ~ 6) × 10^6 J/ m^2, Rockwell hardness (HRA) is up to 78 to 90, widely in the high-speed wire rod rolling process, which is much higher than single-slot chilled cast steel or high speed steel rolls.Tungsten carbide is made of Tungsten Carbide Powder and binder phase (such as drilling, nickel, etc.), and then pressing and sintering, regardless of the conditions under cold rolled or hot rolled has excellent wear resistance, tungsten carbide rollers has been widely used in pre-finishing mill and finishing of high-speed wire rod currently. On the performance of tungsten carbide roller in hot-rolling wire rod , the material must meet the following requirements:
Tungsten carbide roller material design
Tungsten carbide roller category
Tungsten carbide roller production process control Carbide Roller,Carbide Ring,Mill of Rolling Line,Steel Wire Rod,Mill Rolling Finish Stand,Mill Roller Groove Type Luoyang Golden Egret Geotools Co., Ltd , https://www.xtchvof.com
1. Sufficient anti-fracture strength;
2. Good abrasion resistance;
3. The smooth surface finish;
4. Excellent corrosion resistance, thermal fatigue, thermal cracking performance.
Tungsten carbide roller rings can working in bad conditions , small profile rolling (especially rebar rolling) process conditions is harsher than the high-speed wire rod, and therefore corresponds to the profile rolling ,tungsten carbide rollers recommend using high binder phase carbide.
Pre-finishing all vehicles roller should ensure its high toughness, strength, rigidity and thermal conductivity, followed before considering its wear resistance. When designing each vehicles roller, pre-finishing materials should choose carbide grades of Co, Co- Ni- Cr binder content is high (greater than or equal to 25wt%) , requiring an average WC grain size of coarse (5μm ~ 6μm), to obtain a higher shock toughness, proper strength and hardness. For the finishing of the roller movements, particularly the last two rollers of the finish rolling, which suffered load is small, and high relative velocity of the material to be pressed (80 m / min ~ 120 m / min). In this case, the wear resistance of the roller to be the most important requirements, and must ensure the strength , timpact toughness and hardness of a reasonable match, so the binder of Co / Ni content ratio and the average grain WC control of particle size and other factors must have greater control in front of different pre-finishing rolling roll.
According to the structure of tungsten carbide rollers, it can be divided into solid tungsten carbide roller and composite tungsten carbide roller. Solid tungsten carbide rollers have been widely used in pre-finishing and finishing stands high speed wire rod mill (including fixed reducing the rack, pinch roller rack). Composite tungsten carbide roller is made of cemented carbide and other materials, and it can be divided into tungsten carbide composite roll rings and solid tungsten carbide composite roller. Tungsten carbide composite roll rings mounted on the roller shaft; solid tungsten carbide composite roller will be directly cast in the roll axis to form a whole, a large load is applied to the rolling mill.
Tungsten carbide rollers produced by powder metallurgy method, the key to its process control is the chemical composition of the material and the mixture was prepared, pressed molding, sintering and deep processing and other preparation process parameters.
1. Preparation of starting material (WC focus quality): As the WC raw material and quality control of the use of different levels of quality may fluctuate, resulting in adverse effects on microstructure.
2. Preparation of the mixture: Mixture preparation is the key to the production process of the roller, the roller of failure modes - trachoma, mainly generated by this procedure.
3. Pressing: roller pressing is an important process of the roller mill.
4. Sintering: roller sintering is to determine the final quality of the roller production processes, use of advanced low-pressure sintering technology, HIP sintering technology can greatly improve the performance of roller.
5. Deep processing: deep processing rollers have a greater impact on the quality and accuracy of the roller surface.