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.hvofpowders.com
It should be said that in the initial stage of the market launch, this naming can enable consumers to clearly distinguish between the old and new concepts and play a significant role in the expansion of emerging markets.
However, as the stage of market development matures, the understanding of instruments within and across the industry is becoming more and more in-depth, and the word “high†should be interpreted as “high-efficiencyâ€. It is obviously far-fetched. This stays on the surface and does not stand out. The naming of functional differences seems to be insufficient. The unfamiliar concept of “Gao Paiyi†is also more garrulous. It does not have communication and epidemic, and it has no small hindrance to popularization.
Digital scanners - highlighting comprehensive performance through technical features The concept of digital scanning should be inspired by a digital camera. The two are in principle common, both applying digital imaging technology to achieve rapid operations, and both to the consumer The new application experience comes with a lot of common features, such as high efficiency, intuitive, environmental protection, low cost, etc. It can be said that the digital scanner description of such products is still relatively accurate.
Strictly speaking, the paperless office that the office industry has been discussing and implementing has so far been stuck on the surface for various reasons and controversies. Digital scanning similar technologies are already quite mature, and there is no doubt about the role of informationization. I believe that digital Scanners can be a trend product for efficient office and environmental office work. Fine shot meter - describes the features but the appeal is wrong Although there is not much difference between the product features of Gao Paiyi's main push, but the name of the fine shot meter is a little bit different. As the name implies, the Fine Shot meter should be said to have the advantage of its shooting accuracy, but anyone who has known about this kind of instrument knows that accuracy is not its core value, and even the auxiliary value cannot be said. Its real value lies in the integration of multi-functional, hardware and software through digital information technology, and efficient office implementation.
Gao Paiyi main push shape differences, precision shot meter is about to push the main difference between its function, but to find the wrong direction, so the performance is much worse.
Easy to shoot, easy to shoot - to highlight a functional feature more common similar names there are many, many similar meanings of such names, not one by one, generally speaking, highlighting one of the practical features .
Naming is not only of great importance to the business, but more importantly, it allows consumers to directly feel the depth of their own understanding of the product, especially the new type of equipment, consumers do not feel deeply about the value of the product, and rely heavily on market support such as after-sales service. Therefore, it is important to select a business that has a thorough understanding of the product, a smooth after-sales channel, and a long-term market development.
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.
New instruments have different opinions and efficient office equipment concept PK
I believe that in the future this new instrument will bring profound changes to office habits. Using digital information technology for image scanning and acquisition processing, this emerging trend became one of the focuses of the scanner industry in the second half of 2010. As a new instrument for applying new technologies, the interpretation given by the market is diverse. This can be seen in the various names of merchants. Today we will take a look at the nomenclature that the industry has given to this new instrument. Gao Paiyi - performance morphological features to form product differentiation This is the earliest name. It should be said literally that it reflects the physical characteristics of the shooting, and the business should hope to highlight the difference in morphology and operation of the new instrument and traditional scanner.