Wire - Electrical Discharge Machining (WEDM)
Principle: Wire - Electrical Discharge Machining (WEDM) utilizes a continuously - moving fine metal wire (electrode wire) as a tool electrode to erode metal from a workpiece through pulsed spark discharge for cutting and shaping. When cutting an EBSD sample, a high - frequency pulsed voltage is applied between the electrode wire and the sample. When the distance between the electrode wire and the sample becomes small enough, the working fluid is broken down, a discharge channel is formed, and an instantaneous high temperature (which can reach above 10,000°C) is generated, causing the sample material to melt and vaporize locally, thus achieving cutting.
Advantages: It can cut samples with complex shapes and is also effective for cutting materials with high hardness such as cemented carbide and quenched steel. It has a relatively high cutting precision and can obtain a small cutting gap (generally around 0.1 - 0.3 mm), which is beneficial for controlling the sample size.
Disadvantages: The cutting speed is relatively slow, and if the cutting parameters are not set properly, a recast layer may be formed on the sample surface. The recast layer is a layer of tissue formed by the remelting and solidification of the metal on the sample surface during the electrical discharge machining process, and its presence may affect the accuracy of EBSD analysis.

Focused - Ion - Beam (FIB) Cutting
Principle: Focused - Ion - Beam technology uses an electric field to focus the ion beam generated by the ion source onto the sample surface and realizes the removal or deposition of materials through the interaction between the ion beam and the sample atoms. When cutting an EBSD sample, a gallium (Ga) ion beam is usually used. The ion beam scans the sample surface and strips the sample material atoms one by one through sputtering, thus achieving cutting.
 

 

 

 

Laser Cutting
Principle: Laser cutting utilizes a high - energy - density laser beam to irradiate the sample surface, causing the sample material to melt, vaporize, or burn rapidly. At the same time, an auxiliary gas (such as oxygen, nitrogen, etc.) is used to blow away the melted and vaporized materials from the cutting area, thus achieving cutting. When cutting an EBSD sample, a laser with an appropriate wavelength and power is selected according to the properties of the sample material (such as absorptivity, melting point, etc.).
Advantages: The cutting speed is fast, and efficient cutting can be achieved for some regularly - shaped samples. It can cut a variety of materials, including metals, ceramics, and composite materials. Moreover, laser cutting is a non - contact - type cutting, which reduces mechanical damage to the sample.
Disadvantages: A heat - affected zone may appear at the cutting edge, leading to changes in the material's micro - structure. For high - precision EBSD sample cutting, laser parameters need to be precisely controlled, otherwise the cutting surface may be uneven. At the same time, some materials with high reflectivity may reflect the laser, reducing the cutting efficiency and even potentially damaging the laser equipment.

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We analyze and compare the previous products and the current technical situation of our BV FH32 Steel Plate, and develop new technical specifications and processes.
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Relying on the superior conditions and strong advantages of mass production, we are able to meet the different needs of our customers.

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