It is different from the traditional factory where the molten iron rushes and the heavy smoke billows. In Wuxi, such a “green manufacturing†engine plant with green plants, floral fragrances, spacious pavements, and clean factory areas is gradually emerging. It is the base of Xiehai heavy-duty diesel engine Huishan. As a national demonstration unit for energy conservation and emission reduction, what is the "green factory" in this "green factory"? Some people say: Environmental protection is the green factory In the past decade, Xichai has invested hundreds of millions of yuan in the construction of environmental protection facilities. The pioneering use of automated conveyor equipment reduces manual transfer links and costs, and increases production efficiency. In terms of low-carbon, we will take the lead in using ground source heat pump technology and natural gas heating and drying to achieve low-carbon production. Cumulative power savings of more than 17 million kW·h and reduction of 5746 tons of carbon emissions. In the aspect of emission reduction, through the introduction of equipment for centralized circulation of cooling fluids and equipment for centralized suction of mist and dust, the cumulative reduction of non-methane total hydrocarbon emissions by approximately 5.04 tons, reduction of wastewater discharge by approximately 150,000 tons, and reduction in COD emissions by approximately 11%. Ton. In respect of energy conservation, the daily sewage treatment capacity of the plant has been upgraded from the original 2,700 cubic meters/day to 3,200 cubic meters/day by renovating the sewage pipe network. It is estimated that Xichai uses 400,000 tons of reclaimed water each year, which saves more than RMB 1 million in water charges in only one year. Some people say: Environmental protection is the green factory For the first time in China, the application of cold test technology for heavy-duty diesel engine production lines is in Xichai. Compared with the traditional hot test technology, the cold test technology technology greatly shortens the product delivery cycle, at the same time, the school bus no longer consumes diesel fuel, and the total diesel fuel savings of about 2,500 tons, and does not require a lot of water, electricity, gas supply, not to mention Exhaust gas emissions. In addition, Xichai continues to increase investment in advancing the smart factory to realize the interconnection and intercommunication of information across the entire plant and achieve the true meaning of “device interconnection, data exchange, and process interactionâ€. In 2016, FAW Jiefang Xichai Intelligent Manufacturing Project was short-listed by the Ministry of Industry and Information Technology “2016 Smart Manufacturing Pilot Demonstration Projectâ€. Some people say: Environmental protection is the green factory In terms of automotive products, the “EGR+DOC+DPF†technology route is adopted to strictly control pollutant emissions. The cumulative amount of carbon monoxide emitted from the Xichai engine decreased by 28% year-on-year, cumulative hydrocarbon emissions decreased by 30% year-on-year, and cumulative PM particulate matter decreased by 95% year-on-year, effectively reducing emissions of exhaust gas to the atmosphere. In terms of remanufactured products, Xichai has established an engine remanufacturing base. The annual added value of recycled products is close to 125 million yuan, saving 7 million kW·h, and reducing carbon dioxide emissions by 300 tons, which has contributed to the development of circular economy. In the future, FAW Jiefang Xichai will always adhere to the development direction of “green manufacturingâ€, strive hard and advance vigorously, and make new contributions to the harmonious development of people, vehicles and society!
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.xtcwelding.com
Xichai heavy-duty diesel engine Huishan base 
Xichai introduces centralized cooling and processing system for cooling fluids, equipment for centralized suction and dust removal and other equipment to save energy and reduce emissions 
Xichai applied for the first time in China to implement a cold test process for heavy-duty diesel engine production lines 
Xichai adopts "EGR+DOC+DPF" technology route to strictly control pollutant emissions
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.
At the 22nd session of the Standing Committee of the 12th National People's Congress, the Environmental Protection Tax Law (Draft) was submitted for deliberation. This means that China will introduce environmental protection tax for the first time, regulate the production of enterprises, and guide enterprises to complete the green transformation.