Internal-combustion engine companies opened the market in 2013 with good sales
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.xtcmetalpowder.com
In 2013, engine sales of many internal combustion engine companies, such as Yuchai and Xichai, showed an increasing trend. Not only did domestic sales increase year-on-year, overseas sales also achieved good results.
Excellent sales at home and abroad
According to statistics, in January this year, Guangxi Yuchai Machinery Co., Ltd. sold over 50,000 engines, ranking first in diesel engine sales. It is expected that 140,000 units of production orders will be received in the first quarter, and nearly 80,000 units have been completed so far.
In addition, Yuchai's YC4F engine made a good start in sales in Egypt.
In January of this year, the sales of diesel engines of Wuxi Diesel Engine Factory of FAW Jiefang Automobile Co., Ltd. increased by 22.8% year-on-year, and increased by 4.7% from the previous period.
Since November of last year, Xichai has exhibited a year-on-year growth in both diesel engine sales and chain ratio in three consecutive months, which has laid a good beginning for the market expansion of Xichai in 2013.
In overseas markets, Xichai achieved a multi-year increase of 237% year-over-year in the first month.
Multi-dimensional development
In January this year, the share of Xiche Machinery in the major vehicle manufacturers has been steadily increasing. The share of the supporting plants in the Qingqi Automobile Factory has reached 59%, which is two percentage points higher than the level of last year; the total share of the eight major manufacturers in the passenger car market. Compared with the previous month, it increased by 3.4 percentage points compared with the previous month, of which, Yutong Bus's share of the same period increased by 3.65 and 4.49 percentage points year-on-year and month-on-month respectively.
The cultivation of the Xinchai Emerging Market began to show its effectiveness. In January, the sales volume of Xicai Machinery in the non-road machinery market increased by more than 260% year-on-year.
The Xiecha Hengwei 6DF2D-16G engine supporting the John Deere Jialian 1048 type combine harvester has won the favor of users. It has installed more than 700 units by mid-February this year and recently received an order for 400 units in March. With the development of Xichai in various directions, diesel engine sales have begun to show a good momentum of continuous increase.
In January, Yuchai's YC6C series of ship engines increased 275% year-on-year. The value of parts reuse for remanufacturing projects also increased by 185% year-on-year. In addition, 115 horsepower, 125 horsepower, 140 horsepower, and 160 horsepower farm machinery produced by Yuchai are also popular in the market, and many orders have been received.
The first five national gas engines of Yuchai’s second-generation plant were successfully off the assembly line and were dispatched to the three major automobile companies such as the JAC bus. Yuchai plans to start the second phase of the gas engine construction project.
It is reported that the high-power marine gas engine test plant for the first phase of the Yuchai Gas Engine Construction Project has already been put into use, and the second phase of the related project has attracted much attention.
According to Liang Qingyan, deputy general manager of Yuchai Joint Stock Company, Yuchai’s products are in short supply, and it is imperative to accelerate the research, development, and production of gas engines. The second phase of the gas engine project is also on the agenda, so that it can be started as soon as possible and put into production as soon as possible to satisfy customers. Demand.
In 2012, Yuchai to seize the opportunity of the rise of the gas engine market, pay close attention to product R & D and production quality, successfully opened up the market, gas engine production and sales ranks first in the industry. In January 2013, the gas engine had already been switched according to national regulations. However, the demand remained unchanged. Yuchai Corporation spotted the gas engine market and planned to start the second phase of the gas engine construction project.
The sales of Yuchai led to the production of the engine, and the production and sales at the same time drove the rapid development of Yuchai's parts and components, logistics, automobile and other industrial sectors. Yuchai also ushered in a good start in 2013.
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.