What Is Thermal Spraying?

Thermal spraying refers to heating and melting the coating material, atomizing it into extremely fine particles with high-speed airflow, and spraying it onto the surface of the workpiece at a high speed to form a coating. According to the needs of different coating materials, wear resistance, corrosion resistance, oxidation resistance, heat resistance and other aspects can be obtained. ^[1]

1. The base material is not limited, it can be metal and non-metal, and can be sprayed on various base materials;

2. The range of sprayable coating materials is extremely wide, and thermal spray technology can be used to spray almost all solids

Repair of thermal spraying of different parts

1 Paper machine dryer HT20-40 The surface of the cylinder is scratched, corroded and worn. Local corrosion pits on both ends of the cylinder body need to be repaired and strengthened to prevent further corrosion. Arc spraying stainless steel

(Features: fast spraying speed, high bonding strength, resistance to acid and alkali corrosion)

2 Paper mill rubber roller shaft steel, iron bearing position wear extreme poor mild wear: brush nickel plating fast

Severe wear: Thermal sprayed nickel-based powder

3 Upper pressing rod 45 Bearing position wear is extremely poor Mild wear: brush-plated fast nickel

4 The shaft of the beater 45 is worn at the bearing position, and the shaft surface is slightly worn by debris. The brush is plated with fast nickel.

Severe wear: Thermal sprayed nickel-based powder

5 The surface of the blanket rod is covered with copper bearings, and the shaft surface is worn by debris. Mild wear: brush-plated fast nickel

Severe wear: Thermal sprayed nickel-based powder

6 Cage bearing housing Carbon steel bearing wear is extremely poor Mild wear: brush-plated fast nickel

Severe wear: Thermal sprayed nickel-based powder

7 ZBJ13 / 150 slurry pump copper bearing wear is very poor and mild wear: brush nickel plating fast

8 Copper shaft and hole wear of pulp propellers are extremely poor. Mild wear: brush-plated fast nickel

Severe wear: Thermal sprayed nickel-based powder

9 ZBJ2Q1100 fine slurry pump cast iron shaft, shell bearing position wear is very poor mild wear: brush nickel-plated fast nickel

10 Steam ball machine steel, iron shafts, holes bearing position wear extreme poor mild wear: brush nickel plating fast

Severe wear: Thermal sprayed nickel-based powder

11 The wear of the mating surfaces of the steel of the blade and lawnmower is extremely poor. Mild wear: brush-plated fast nickel

12 Cyclone dust remover steel and iron bearing positions wear and tear is very poor mild wear: brush nickel-plated fast nickel

Severe wear: Thermal sprayed nickel-based powder

13 The wear of each bearing position of the calender steel is extremely poor. Mild wear: brush-plated fast nickel

14 Dimension repair steel for bearing positions and end covers of various types of motors

Extremely poor wear at various bearing positions on cast iron: mild nickel plating by brush

Severe wear: Thermal sprayed nickel-based powder

15 cage shaft

The cage shaft of the cylinder paper machine is a through-shaft that runs through the entire cage. After the bearing seats at both ends are worn out, the shaft cannot be changed or

1. Before the oxygen cylinder is equipped with a pressure reducer, the oxygen valve should be opened slightly to blow off the dirt, so as to prevent dust and garbage from entering the pressure reducer and clogging, causing an accident.

2.It is forbidden to put oxygen cylinders, acetylene cylinders and other combustible steel cylinders together; all flammable products, grease and oily items cannot be transported with oxygen cylinders in the same car.

3. When carrying oxygen and acetylene bottles, the protective cap on the neck of the bottle should be installed. When using it, it should be placed in a proper and reliable place to remove the protective cap on the neck of the bottle. At this time, it can only be unscrewed by hand or wrench. It is forbidden to strike with a metal hammer to prevent accidents caused by sparks.

4. At least 6 ~ 8 buckles of the oxygen decompression gauge nut should be screwed on the mouth of the oxygen cylinder. The screw joint should be tightened and the adjustment screw of the decompression gauge should be loosened.

5. After the oxygen cylinder and pressure reducer are installed, slowly open the oxygen valve, check whether the connector of the pressure reducer connected to the oxygen cylinder is leaking, and the table indicates whether it is flexible. When opening the oxygen valve, do not face the pressure reduction. The meter should stand on the side or the back of the pressure reducer. Do not use pyrotechnics or open flames when checking for leaks. Use soapy water to check. Use only after checking for leaks

6. It is strictly forbidden to contact the mouth of the oxygen cylinder with grease, or use an oil-stained wrench to screw the oxygen-cylinder valve and the pressure-reducing connection screw. It is also not allowed to wear oil-stained gloves, so as to avoid a fire and explosion accident.

7.The oxygen cylinder, acetylene cylinder and pressure reducer should be properly placed before and after use to avoid impact and vibration.

8.When using acetylene and oxygen cylinders, they should be placed vertically and fixed with a bracket to prevent falling.

9, oxygen and acetylene bottles,

GB / T 9793-1997 metal and other inorganic coatings thermal spray zinc, aluminum and their alloys implemented 1998-02-01, replacing GB / T 9793-1988, GB / T 9794-1988, GB / T 9795-1988, GB / T 9796-1988

GB 11375-1999 Metal and other inorganic coatings thermal spraying operation safety 2000-03-01 implementation, replace GB 11375-1989

GB / T 8642-2002 Determination of tensile bonding strength of thermal spraying 2003-04-01 implemented instead of GB / T 8642-1988

GB / T 12607-2003 Thermal spray coating naming method has been transformed into industry standard: JB / T 10580-2006

GB / T 12608-2003 Technical requirements for classification and supply of wire, rod and core materials for thermal spray flame and arc spraying are implemented on 2004-05-11, replacing GB / T 12608-1990

GB / T 18681-2002 Thermal spray low-pressure plasma spray nickel-cobalt-chromium-aluminum-yttrium-tantalum alloy coating

GB / T 16744-2002 Thermal spray self-fluxing alloy spraying and remelting 2002-12-01 implemented instead of GB / T 16744-1997

GB / T 18719-2002 Thermal spray terminology and classification

GB / T 19352.1-2003 Quality requirements for thermal sprayed thermal sprayed structures. Part 1: Guidelines for selection and use

GB / T 19352.2-2003 Quality requirements for thermal sprayed thermal sprayed structures. Part 2: Comprehensive quality requirements

GB / T 19352.3-2003 Quality requirements for thermal sprayed thermal sprayed structures-Part 3: Standard quality requirements

GB / T 19352.4-2003 Quality requirements for thermal sprayed thermal sprayed structures. Part 4: Basic quality requirements

GB / T 19356-2003 Thermal spray powder composition and technical specifications for supply

GB / T 19823-2005 Application steps of thermal spray coating for thermal spraying engineering parts

GB / T 19824-2005 Thermal spray thermal spray operator assessment requirements 2005-12-01 Implementation

GB / T 20019-2005 Thermal spray thermal spray equipment acceptance inspection

GB / T 8640-1988 Rockwell hardness test method of metal thermal spray coating surface has been transformed into industry standard: YS / T 541-2006

GB / T 8641-1988 The determination of the tensile strength of thermal spray coating has been transformed into the industry standard: YS / T 542-2006

GB / T 11373-1989 General rules for surface pretreatment of thermal sprayed metal parts

GB / T 11374-1989 Non-destructive measurement method for thermal spray coating thickness

GB / T 13222-1991 The determination of the shear strength of metal thermal spray coatings has been transformed into an industry standard: YS / T 550-2006

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