1) The electroforming process uses a DC power supply voltage: 3 V to 15 V, current density: 1 ~ 12A/dm2, the anode and the cathode are inserted in the electroforming solution, pure nickel is an anode, while a cathode is stainless steel or Ti ;

2) The composition of the electroforming solution of nickel sulfamate: 120 to 350 g / l, nickel chloride: 20 ~ 45 g / l, sodium tungstate: 480 ~ 1400 g / l, boric acid: 10 ~ 50 g / l . In the electroforming process, we should stire, the stirring speed: 60 to 130 rev / min;

3) Electroforming process performed at a constant temperature is 550C, then the filtration residue, electroforming process control time: 1 hour to 12 hours.

Advantage of the present invention is that: the Ni atom, and W atoms in each electric crystal grains was occupied by each gap arrangement, succeeded in preparing high density tungsten-nickel alloy block.

 

The present invention provides a process for preparing nano-nano WC and PTFE bath brush. Characterized in that:

1) selection of raw materials: nano size were selected 80-100nm particles of tungsten carbide WC 3g / L; size 30-60nm nanoparticles polytetrafluoroethylene PTFE particles 5g / L;

2) mixing: The above raw materials into 20ml / L of acetone were mixed wet, and added to a 1L ordinary express all the nickel plating bath brush, adding 0.1g / L of Tween 40 dispersing agent;

3) magnetic stirring: the first bath and the resulting mixture magnetically stirred 30min;

4) ultrasonic oscillations: ultrasonic oscillation 60min;

5) derived products: tungsten carbide nano and nano obtain teflon brush bath.

Compared with the prior art, the invention may be formulated process is simple, nano and nano-tungsten carbide dispersed uniformly suspended PTFE composite plating solution, nanocomposite coatings to meet process requirements.

 

The present invention describes a tungsten alloy composite coating materials. Characterized in that:

1) tungsten alloy composite coating material is made of tungsten alloy and a large number of dispersed multiphase composite structural material of tungsten alloy particles or fibers;

2) a tungsten alloy composite coating weight percent tungsten in the range of 5 to 98%, the weight percentage of particles or fibers in the range of 0.05 to 80%, particle size of 3 nm to 5 microns range of fiber diameter in the range of 3 nm to 5 microns.

3) The low stress coating has excellent temperature and high-temperature hardness and wear resistance, excellent high temperature oxidation resistance, excellent resistance to corrosion.

4) tungsten alloy composite coating has an important purpose in the machinery industry, chemical and pharmaceutical industry, metallurgical industry, aerospace, weapons and ammunition, oil exploration, mining industry, the electronics industry, particularly suitable for applications requiring high temperature strength and corrosion resistance of occasions.

 

The present invention provides a nano tungsten - nickel composite coating preparation, plating technology in the field is interdisciplinary and nano materials. Characterized in that:

1) The coating consists of a matrix consisting of nickel and firmly embedded in one of the nano-tungsten carbide particles;

2) The plating solution is: NiSO4.7H2O :130-200 g / l, NiCl2: 30 ~ 50 g / l, tungsten carbide nano :30-80 g / l, CoSO4: 2 ~ 10 g / l, H3BO3: 30 - 50 g / l saccharin 3-5 g / l, FK-370, low foam wetting agent, 2-5 g / l, FK-287A Main optical agent 1-3 g / l, FK-287B adjuvants: 2-4 g / l, FK-287C stabilizer :10-20 g / liter;

3) Plating process conditions: CoSO4 agent to promote coprecipitation of 2 to 10 g / l; 60 to 90 rev / min speed intermittent stirring;

4) Temperature of the plating solution 25-35 ℃; cathode current density of 15-25 On / dm2; pH of the plating solution is 3 to 5;

5) Anode area ratio of 2:3.

The present invention provides nano WC - Preparation of nickel composite coatings with low cost, high utilization of nano-powders, nano-tungsten carbide powder does not decay in the preparation and processing of nano-powders, etc. without prior reunion.