Processing Technology

1. Cutting:

Oxy-fuel Cutting: Uses a combination of oxygen and fuel gases to cut thick steel plates.

Plasma Cutting: Uses an electric arc and gas to create plasma, which can cut finer details and at higher speeds than oxy-fuel.

Laser Cutting: High precision method suitable for thin plates.

Waterjet Cutting: Uses high-pressure water, often mixed with abrasives, to cut steel.

2. Rolling:

Hot Rolling: This process involves heating the steel plate and rolling it to shape. It refines the grain structure and improves toughness.

Cold Rolling: Rolling of the plate at room temperature, enhancing its strength and surface finish.

3. Heat Treatment:

Normalizing: Heating the steel plate and then allowing it to cool in open air to refine the grain structure.

Annealing: Slowly heating the plate and then cooling it to make it softer and improve its ductility.

Quenching and Tempering: This involves the rapid cooling of the plate (quenching) and then reheating (tempering) to achieve a balance of hardness and toughness.

4. Bending/Forming:

Press Brake Forming: A mechanical process where plates are bent to the desired shape using a press brake machine.

Roll Bending: Plates are bent into cylindrical shapes by passing them through a series of rolls.

5. Welding:

Used to join multiple plates together or attach components. Common methods include Shielded Metal Arc Welding (SMAW), Gas Metal Arc Welding (GMAW), and Submerged Arc Welding (SAW).

6. Surface Treatment:

Shot Blasting: Cleaning the steel surface using steel shots to improve paint adhesion and overall surface finish.

Painting/Coating: Application of protective coatings to prevent corrosion and enhance resistance to environmental factors.

7. Drilling and Machining:

Creating holes or refining the plate dimensions and surface finish.

8. Testing:

Non-destructive Testing (NDT): Techniques such as ultrasonic testing, radiographic testing, and magnetic particle testing are employed to detect internal and surface defects.

Destructive Testing: Methods like tensile testing, impact testing, and bend testing to understand the material properties.

9. Inspection:

Visual inspection and dimensional checks are conducted to ensure adherence to specifications.

10. Cladding:

In some applications, boiler steel plates might be clad with a corrosion-resistant alloy to provide protection against specific environmental conditions.

(The exact processes and their sequences can vary based on the intended application, specific steel grade, and manufacturer's capabilities. Proper processing ensures the boiler plates meet the demanding requirements of high-pressure and high-temperature service conditions.)

Physical Properties

Chemical Composition

(Note that there are other grades of boiler steel plates with different chemical compositions and properties. Always consult the manufacturer's material specifications or standards when selecting a specific grade for an application.)