Stainless steel shot, also referred to as stainless steel round steel cut shot or stainless steel cut wire shot, is a versatile material primarily employed in surface treatments such as shot blasting, sandblasting, shot peening, finishing, strengthening, matting, correcting, paint removal, and corrosion removal for stainless steel components, aluminum alloy die castings, and copper alloy parts. Its moderate hardness, pure composition, and broad coverage make it an ideal choice due to its longer lifespan compared to conventional cast steel shots, which tend to have pores and special shapes. After treatment with stainless steel shot, the casting surface attains a smooth, rust-resistant finish, eliminating the need for post-treatment like pickling, thus promoting environmental friendliness.
Steel shot encompasses multiple classifications based on varying manufacturing processes and raw materials. Its hardness generally ranges from HRC40 to HRC50, suitable for processing hard metals, and can be enhanced up to HRC57-62 for enhanced applications. These steel shots boast excellent toughness, outlasting cast iron shots severalfold, which are notably brittle (HRC58-65), prone to breakage, and have a shorter lifespan, limiting their use primarily to high-intensity shot peening requirements.
Glass shot, on the other hand, boasts a lower hardness than the aforementioned types and is favored in situations where iron contamination is unacceptable, such as with stainless steel, titanium, aluminum, and magnesium. It also finds use in secondary treatments following steel shot peening to eliminate iron contamination and smoothen part surfaces.
Cut wire shot, colloquially known as steel wire shot, is cylindrical in shape and has a density of 7.8gcm³. Its application span is vast, encompassing cleaning, rust removal, shot peening, and pretreatment processes for various materials, including die castings, forgings, steel plates, H-beams, and steel structures. Cut wire shot is compatible with numerous shot blasting machines and equipment, emphasizing its versatility.
The selection of steel shot is a crucial aspect influencing work efficiency. Factors such as moderate hardness, sufficient density, and an appropriate metallographic structure contribute to faster cleaning speeds, stable quality, and reduced consumption. While higher hardness steel shots may yield faster cleaning, they also consume more quickly, necessitating a balance between cleaning efficiency and cost-effectiveness. The material and hardness of the workpiece must be considered to maximize steel shot lifespan.
In summary, the choice of steel shot is multifaceted, requiring careful consideration of hardness, density, metallographic structure, cleaning speed, quality stability, and consumption. By selecting steel shot wisely, one can significantly enhance work efficiency while minimizing costs and ensuring a high-quality finished product.