The priority of tungsten carbide ball diameter Dw(mm) table:

Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

Tungsten carbide ball grinding diagram below, which shows that the processing is between two cast iron lapping plates. And there is V-shaped groove on the under plate, which the groove angle is generally 60°or 90°. The material of rotation plate is the same, and the next turn plate rotation drive tungsten carbide ball trenches friction and rotational torque in the rotation and orbital motion testimony. Tungsten carbide ball contacts the groove of the grinding plate with three-point or three-line, which contact with the rotating plate driven ball as to be parallel to the axis of rotation of the grinding plate motion.

Due to the differences of line speed and the contact pressure, the contact points with the groove (line) to drive the ball as perpendicular to the axis of rotation of the grinding plate motion. The size of the spin angular groove angle is related to the shape, the angle of the groove and the rotating speed of grinding plate, which directly affects the efficiency and the machining accuracy of tungsten carbide ball grinding.










Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:  This email address is being protected from spambots. You need JavaScript enabled to view it.
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

Cemented carbide is widely used as solid carbide cutting tools, such as drill bits. Correctly use cemented carbide drill bits, to turn material resources to good account,is a mechanical processing practitioner’s responsibility.

How to correctly use cemented carbide drill bits? It mainly includes the following aspects:

1.Choose the right machine tool

Cemented carbide drill bits can be correctly used in those machine tools with high power and good rigidity, such as CNC machine tool and machining center. Radial drill and universal milling machine should not be chosen due to the low power and poor precision of the spindle, which are easily lead to early collapse of the cemented carbide drill bits.

2.Choose the right tool holder of cemented carbide drill bits

If you want to correctly use cemented carbide drill bits, collet chuck, side handle and hydraulic chuck can all be used as tool holder. For quickly change chuck, because the clamping force of it is not enough, you should rather not choose it.

Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:This email address is being protected from spambots. You need JavaScript enabled to view it.
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

Tungsten (W) films were grown with atomic layer control using a novel sequence of self-limiting surface reactions. The tungsten film growth was achieved by dividing the binary reaction WF₆+Si₂H₆→W+2SiHF₃+2H₂ into two separate half-reactions. Alternating exposures to WF6 and Si2H6 in an ABAB… sequence produced tungsten deposition at temperatures between 425 and 600 K. The Si₂H₆ reactant served only a sacrificial role to strip fluorine from tungsten without incorporating into the film. FTIR spectroscopic investigations demonstrated that the WF₆ and Si2H6 half-reactions were complete and self-limiting at T>400 K. In situ spectroscopic ellipsometry measurements determined a tungsten growth rate of 2.5 Å/AB cycle with WF6 and Si2H6 reactant exposures sufficient for complete half-reactions. The surface topography of the deposited tungsten films was flat indicating smooth film growth. The tungsten films were either amorphous or composed of very small crystalline grains and contained no measurable silicon or fluorine. These results represent the first demonstration of atomic layer deposition of smooth single-element metal films using sequential surface chemistry.

 

Tungsten Powder Manufacturer & Supplier: Chinatungsten Online - www.tungsten-powder.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

Tungsten carbide ball has high hardness and usually above 87 HRA, which is double than normal steel ball so that the process is also difficult. The main problem is that the low surface energy of tungsten carbide ball, grinding media and abrasive adhesion is poor. Therefore, it has a huge influence on the efficiency and the accuracy or the surface roughness of tungsten carbide ball. Secondly, the rotation of tungsten carbide ball in the grinding plate is poor, which affects the machining accuracy carbide ball to some extent, especially spherical error.

At present, the most of equipments are based on steel ball process, which needs us to improve the equipment and grinding structure, choose proper grinding compounds and grinding plate for optimizing the parameters. In addition, high precision tungsten carbide ball milling mode includes that four-axis ball milling, V-groove grinding, conical grinding, spin rotation control, magnetic grinding and two-way rotation grinding.
















Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

Some main tungsten carbide ball grades table

The table shows that the hardness will decrease by the increasing Co content, while its toughness and bending strength is enhancing. In addition, fine grain has higher density and hardness than coarse grain and other properties are also improving after sintering.

Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.c
n

Determination of arsenic,copper,manganese,molybdenum,phosphorus and silicon in ferrotungsten by inductively coupled plasma atomic emission spectrometry.

A simultaneous determination method of arsenic,copper,manganese,molybdenum,phosphorus and silicon in ferrotungsten by inductively coupled plasma-atomic emission spectrometry was established.The samples were dissolved with oxalic acid and hydrogen peroxide.The matrix elements(W and Fe) and other coexisting elements had no interference with the testing elements.Under the optimal conditions,the detection limits of arsenic,copper,manganese,molybdenum,phosphorus and silicon were 0.009,0.006,0.000 1,0.000 3,0.005 and 0.002 μg/mL,respectively.The standard addition recoveries were 95 %-108 %,and the relative standard deviation(RSD,n=3) was 0.1 %-3.3 %.The proposed method has been applied to the determination of certified reference material,the results were in good agreement with the certified values.



 

Tungsten Powder Manufacturer & Supplier: Chinatungsten Online - www.tungsten-powder.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

Abstract

To improve the adhesion strength between TiN coatings and WC-Co substrate, interlayer of Co was pre-deposited onto WC-Co substrates prior to the TiN coating process. The thickness and post-annealing effects of Co interlayer on the adhesion property were investigated through scratchtests in this work. The highest critical load of approximately 84 N was obtained for the TiN coating with Co-interlayer sputter-time of 10 min and the critical load increased up to 97 N after post-annealing at 600 °C for 2 h. It was found that the adhesion of TiN coatings was strongly influenced by the thickness of Co interlayer. TiN without Co interlayer and TiN with three kinds of Co interlayer coatings were applied to end-mill tools made of WC-Co material with a hybrid coating technique.

Cutting tests for die steel AISI D2 cold-worked die steel (60 HRC) and their reliability tests were studied. The tool life of TiN-coated tool with Co interlayer having the critical thickness of 0.027 μm was improved for over 36% as compared to only TiN-coated tools. The experimentation was repeatedly performed in order to verify the goodness of fit for tool wear distribution. The flank wear of TiN-coated tool with Co interlayer at given time condition is suitable for normal distribution and log-normal distribution by chi-squared test.

Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:This email address is being protected from spambots. You need JavaScript enabled to view it.
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn