How to detect the quality of cast steel shot?

　　1. Appearance inspection

　　Observe the shape and surface condition:

　　High-quality cast steel shot should be spherical, with a smooth surface, without cracks, burrs or irregular shapes.

　　Check whether there is rust, oil or other contaminants on the surface of the cast steel shot.

　　Check the uniformity of size:

　　Use a sieve or particle size analyzer to detect the particle size distribution of the cast steel shot to ensure uniform size and meet the specification requirements.

　　2. Physical property inspection

　　Hardness test:

　　Use hardness testing equipment such as Rockwell hardness tester to measure the hardness value of the cast steel shot.

　　The hardness should be moderate. Too high may cause excessive damage to the workpiece surface, and too low may reduce the cleaning efficiency.

　　Density detection:

　　Measure the density of the cast steel shot by methods such as densitometer or specific gravity bottle.

　　The density should be uniform and meet the requirements of relevant standards or specifications.

　　Fatigue life test:

　　Simulate the repeated impact and wear of the steel shot in actual use to evaluate its fatigue life.

　　Cast steel shot with long fatigue life has better durability and economy.

　　3. Chemical composition analysis

　　Spectral analysis:

　　Use equipment such as spectrometers to analyze the chemical composition of steel shots.

　　Ensure that the chemical composition of cast steel shots meets relevant standards or specifications and is free of harmful impurities.

　　Metallurgical structure observation:

　　Observe the metallographic structure of cast steel shots through a metallographic microscope to evaluate its internal structure and uniformity.

　　4. Practical application test

　　Evaluation of shot blasting cleaning effect:

　　In actual shot blasting equipment, use the cast steel shots to be tested to clean the surface of the workpiece.

　　Evaluate the cleaning effect, including cleaning speed, surface roughness, cleanliness, etc.

　　Equipment wear inspection:

　　Observe the wear of shot blasting equipment during the use of cast steel shots.

　　High-quality cast steel shots should reduce equipment wear and extend equipment life.