What Is a Paring Chisel?

Chisel wear refers to a form of abrasive wear in which abrasive particles press into the surface of the material during wear and cause material loss due to tangential movement. The chiseling process is characterized by severe impact loads and material loss. At this time, the abrasive particles are also subject to high stress and fragmentation. Therefore, it is called high-stress chiseling and abrasive wear. This type of wear often occurs on the wall of the cone crusher and the teeth of the excavator.

Chiseling wear refers to the abrasive particles pressed into the material during wear

The chiseling process is characterized by severe impact loads and material loss. At this time, the abrasive particles are also subject to high stress and fragmentation. Therefore, it is called high-stress chiseling and abrasive wear. It is used in the jaw crusher tooth plate and ball mill liner. This type of wear often occurs on the wall of the cone crusher and the teeth of the excavator.

Materials used for chiseling and abrasion conditions should first have high impact toughness and strong work hardening ability, so high manganese steel is the best material. The austenitic manganese steel containing C1. 00 ~ 1.4% and Mn11 ~ 14% does not fracture under high impact loads, and the hardness of the workpiece surface will be doubled due to the structural changes induced by strong impact stress, resulting in a fairly good Abrasion resistance.

Chiseling wear mostly occurs in three-body abrasive wear conditions ^[1]

Wear is a basic type of component failure. In a general sense, wear refers to the reduction in the geometry (volume) of a component. The failure of a component to perform its intended function is called failure. Failure includes the complete loss of the intended function; reduced functionality and serious damage or hidden dangers, continued use will lose reliability and safety and security.

According to the characteristics of surface failure mechanism, wear can be divided into abrasive wear, adhesive wear, surface fatigue wear, corrosion wear, and fretting wear. The first three are the basic types of wear, and the last two occur only under certain conditions.

(1) Abrasive wear: the friction between the surface of the object and the hard particles or hard protrusions (including hard metal) caused the surface material loss;

(2) Adhesive wear: When the friction pair moves relative to each other, the contact surface metal is lost due to the result of solid-phase welding;

(3) Surface fatigue wear: under the effect of alternating contact compressive stress on the two contact surfaces, the material surface causes material loss due to fatigue;

(4) Corrosion and abrasion: During the friction process of the surface of the part, the surface metal and the surrounding medium chemically or electrochemically react with each other, resulting in material loss;

(5) Fretting wear: There is no macro relative movement between the two contact surfaces, but under the influence of external fluctuation load, there is a relative vibration with a small amplitude (less than 100 m). At this time, a large amount of fine oxide wear powder is generated between the contact surfaces, so The resulting wear is called fretting wear ^[1] .