metal alloy ceramic plasma spray machine 

 

       1.component of SX80 metal alloy ceramic plasma spray machine 

(1)Power supply

Silicon controlled rectifier, maximum power input: 85KW, arcing time factor: 100%, plus or minus 15% Grid fluctuation, Maximum power output: 80KW. It can work normally under Current fluctuating range: 1~2%. The power supply provides DC current for spray gun. It is controlled by intelligent module, working 24 hours without breakdown. It is the best plasma power supply in China.

 

 (2) Transfer box

The transfer box is the transfer center of this plasma spraying equipment. It links power supply, control cabinet, heat exchanger and spray gun together. There are high frequency ignition , waterway and gas circuit alarming devices inside this box. The transfer box is moveable, with standard 5 meter long water-cooled cable.It mixes the water and electricity and sends them to the spray gun,meanwhile it offers high frequency impulse voltage which is needed when the spray gun forms the arc,and tests spay gun’s returned water’s temperature and cooled water’s pressure.It’s easy and flexible,easy to draw,is good at forming arc ,and can reduces the moment currency’s  impact when the nozzle is forming arc.

 

(3) SX-80 control cabinet

Control cabinet is the control center of SX-80. Its input voltage and power are single phase 220V, 1Kw. It is equipped with float flowmeter, it’s  digital displaying for indicating  current and voltage. It has three working modes of manual control, automatic control and economic operation. It’s equipped with alarming and breakdown display unctions. It will alarm when:

(1). Pressure of main and secondary gas is lower than 0.3Mpa, or main gas flow is under 30L/min.

(2). Water temperature is higher than 50, or water flow is under 8L/min.

The control cabinet is used for controlling and adjusting water, electricity, gas and spray powder. It monitors the whole spray system so  users can directly get the working parameters of the system, that is  to say, you can directly read the voltage, current and so on. When the power supply or gas supply cannot meet the system requirement, there will be automatic alarming warning,which can remind the user to make corresponding adjustment.  By operating the control cabinet panel, users can adjust the current and voltage to regulate the temperature of plasma arc. They can also adjust the main and secondary gas to regulate the gas flow and gas proportion for changing the length and velocity of plasma arc.

 

Parameter of SX-80 control cabinet

Number	Items	Basic parameter
1	input power supply	AC220V,50Hz/80Hz
2	input power	300W
3	control mode	PLC Control Replay
4	Main gas and gas pressure	argon,nitrogen,0.6-0.8MPa
5	Maximum consumption of main gas	2m3/h
6	secondary gas and gas pressure	hydrogen,helium,0.25-0.4Mpa
7	Air and pressure	dried 0.5Mpa
8	Gas using mode	argon,argon hydrogen,nitrogen nitrogen+hydrogen
9	Dimension	610*450*1700mm
10	Weight	65KG

 

 (4) SX-80 powder feeder

The powder feeder is used to store spray powder and send these powder to spray gun according to technological requirements. The SX-80 system is equipped with one binocular powder feeder. The range of powder particle size is 5~200m. The two tube can feed powder at the same time, the feeding speed is  8~250g/min.  Users can adjust the potentiometer on control cabinet panel to regulat the feeding speed.

 

(5)SX-80 spray gun

We can offer customer imitative METCO 9 MB spray gun, using argon or nitrogen as main gas, hydrogen as secondary gas. The working current of spray gun: 100-800A. The working voltage: Ar+H2: 50-75V, N2+H2: 50-80V. We provide the following spray gun accessories for  our customer: spray nozzle, powder and cooling air jetting shelf, water-cooled cable, electrode tip, insulator, sealing ring, and other special tools.

 

(6) SX-80 heating exchanger

Heat exchanger is also called refrigerator or water chiller. We use double motors compressor to make this machine smaller and save space for our customer. The spray gun is cooled down by water, and we use heat exchanger to cool down the high temperature water coming from spray gun, and then use these cooled water  to cool down the spray gun again. In this way the spray gun can keep a normal working temperature and prolong the usage life of spray nozzle.

Function characteristic

 

 

(7)Parameters of cooling system

 

2.Applications  of SX80 metal alloy ceramic plasma spray machine 

(1)Provide protection against high temperatures, corrosion, erosion, wear
(2) Change the appearance, electrical or tribological properties of the surface, replace worn material

(3)Sprayed on substrates of various shapes and removed, free-standing parts in the form of plates, tubes, shells, etc.

(4)Powder processing (spheroidization, homogenization, modification of chemistry, etc.)

 

 3. Our other main thermal spraying equipments(spray machine) 

   (1)  HVOF spray equipment     (2) Plasma spray equipment    (3)  Vacuum Plasma Spray Machine

   (4)  arc spraying machine      (5)   Industrial water chillers   (6)  High power flame spray plastic equipment and so on

  

 

4. By the way,do you know how to choose the thermal spray technology/process ?

a. In thermal spray technology/process,, the basic factors that determine coating quality are:

(1) The heating temperature of the spray material;

(2) The velocity of spraying material impacting on the substrate material;

(3) during heating, spraying and cooling process , the oxidation degree of the spraying materials and substrate

 

    The maximum temperature and particle velocity obtained by different thermal spraying methods are not the same. For many materials, the oxidation of sprayed particles does not meet the requirements, so it is necessary to  heat and increase particle speed quickly. The technical characteristics of various thermal spraying processes are listed in the table below:

 

Classification	Normal flame spray	Explosion spray	Arc spray	Plasma spray
Particle velocity/m.s-1	40~100	600~800	100~250	150~300
Flame temperature/℃	2100~2300	3100	4500	10000
Coatingporosity/%	10~15	0.5~2	2~15	5~10
Bonding strength/MPa	10~30	70~100	20~40	30~70
Advantages	Simple equipment, flexible process	Low porosity, high bonding strength and low substrate temperature	Low cost and high spraying efficiency	The coating is well combined and the spraying material is wide
disadvantages	High porosity and low bonding strength	High cost, low efficiency and large noise	spraying material is limited	High cost

 

     When choosing the process method, we should also consider the mechanical properties of the spraying layer, consider the mechanical processing according to the size and shape of the parts, then decide which kind of spraying method to be used , and what is the processing cost and so on .

 

 

b. Principles of choosing the spraying process

(1) principle of reliability

If the coating bonding force requirement is not very high,  and the melting point of the spraying materials is less  than 2,500 ℃, then we can  use flame spraying  with simple equipment and low cost

 

(2) principle of applicability

     For those higher requirements of the coating performance or some dearer parts, it is better to  use  plasma spraying. Because the melting point of the plasma spraying material is not limited, the heat source has the non oxidation performance, the coating bonding strength is high and the porosity is low

 

(3) Principles of economics

Arc spraying is often used in metal spraying construction with large amount of engineering.

 

(4)if require metal or alloy coating with high bonding force and low porosity ,you can consider supersonic plasma spraying or supersonic flame spraying (HVOF spraying machine)

 

(5) For large batches of workpieces, it is better to use automatic spraying. Automatic spraying machine can be purchased in a complete set, can also be designed.

 

 

          If you are interested in our machine ,Please contact me for further details ,thanks