Cut wire shot is a popular metal abrasive used for various surface treatment applications such as blasting, deburring, peening, and cleaning. Zinc cut wire shot and steel cut wire shot are two types of cut wire shot that differ in composition, characteristics, and uses.
Composition and Properties
Zinc cut wire shot is made of high-purity zinc wire that is cut into cylinders of uniform length and diameter. It has a hardness of around 35-45 HV and a density of 7.1 g/cm3. Zinc cut wire shot is non-toxic, non-magnetic, and has a low dust emission. It does not contain any free iron, which makes it ideal for applications where ferrous contamination is not acceptable, such as in the aerospace, medical, and electronic industries. Zinc cut wire shot also has a galvanic effect that provides sacrificial protection to the metal surface against corrosion.
On the other hand, steel cut wire shot is made of high-carbon steel wire that is cut into pellets of various shapes and sizes. It has a hardness of around 50-60 HRC and a density of 7.8 g/cm3. Steel cut wire shot is magnetic, and its high hardness and density make it suitable for heavy-duty applications that require fast cleaning and peening, such as in foundries, shipyards, and automotive plants. Steel cut wire shot also provides a good surface finish and can increase the fatigue life of metal components.
Advantages
Zinc cut wire shot has several advantages over steel cut wire shot, depending on the application requirements. Firstly, zinc cut wire shot is softer and less abrasive than steel cut wire shot, which means it can clean or peen delicate or thin-walled parts without causing deformation or damage. Zinc cut wire shot is also non-sparking, which makes it safe to use in explosive environments. Secondly, zinc cut wire shot has a longer life span than steel cut wire shot, as it does not wear out quickly or break down into fines that can contaminate the workpiece or cause clogging in the blasting equipment. Lastly, zinc cut wire shot is recyclable and eco-friendly, as it does not release any hazardous waste or emissions during the blasting process.
Steel cut wire shot also has its advantages that make it a preferred abrasive in certain industries. Firstly, steel cut wire shot is more aggressive and faster than zinc cut wire shot, which means it can remove heavy rust, scale, and paint from metal surfaces in a shorter time. Steel cut wire shot is also more durable, as it can withstand high blasting pressures and repeated use without deteriorating. Secondly, steel cut wire shot has a higher peening intensity than zinc cut wire shot, which means it can induce deeper compressive stresses and improve the resistance of metal parts to stress corrosion cracking, fatigue, and wear. Lastly, steel cut wire shot is cheaper than zinc cut wire shot, which means it can be more cost-effective for large-volume blasting projects.
