Walking rivers and lakes, travel landscapes, there must be skills to add. Although e-COUNTY has just entered the passenger cars, there are unique stunt blessings. Among them, “relaxation is a measure of freedom†is one of the characteristics of this unique skill.
Strong and powerful
e-COUNTY is powerful in terms of dynamics. It appears as if the passenger cars are in rivers and lakes. It is equipped with a domestic first-class powertrain, and after years of baptism in the market, its performance is mature and reliable. The Yuchai engine is used in the mid-level version, and the Cummins engine is used in the commercial version. The actual demands of different users are met through different power configurations. Among them, the maximum output power of a Cummins engine can reach 154 horsepower, and the maximum torque can reach 500 Nm, which can easily meet the actual passenger demand of users.
Safe braking
With static brakes, we can turn for safety and win in stability. In terms of braking performance, e-COUNTY excels in terms of braking reaction speed and braking effect. e-COUNTY is equipped with an ABS anti-lock brake system, which senses the wheel state through the sensor and automatically activates the ABS system to adjust the braking force of the wheels. In the event of emergency braking, the wheel steering can still be controlled, effectively preventing deviations and sideways. Slide, flick and other phenomena.
In addition, the e-COUNTY comes standard with exhaust brakes and an optional electronic retarder. In the rain and snow weather, it is also possible to achieve effective braking, and reduce slippage, sideshift, etc., and increase the service life of the brake pads.
e-COUNTY can also be equipped with front and rear drum brakes, which can not only effectively improve the braking stability, but also reduce the damage caused by brake heat attenuation.
Passenger cars and rivers are heroes. Bus heroes - e-COUNTY first appeared in the rivers and lakes, has been unique skills, come to the fore. I believe that in the bus fleet of heroes, with the unique skills of multiple features such as relaxation and relaxation, e-COUNTY will surely make Wei Zhen rivers and lakes famous!
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:
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.
Tungsten carbide roller material design
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.
Tungsten carbide roller category
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 roller production process control
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.
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.xtccarbide.com