What Is Abrasion Resistance?

The abrasion resistance of a material is expressed by the amount of wear or abrasion resistance index. Abrasion resistance is also called abrasion resistance. Abrasion resistance is related to almost all properties of the material, and under different abrasion mechanism conditions, there are different requirements for material properties in order to improve wear resistance.

Abrasion resistance is the ability of a material to resist mechanical wear. Under the condition of a certain load speed, the wear per unit area per unit time. It is expressed by the amount of abrasion of the sample, which is equal to the difference between the mass before and after grinding of the sample divided by the area under wear.

Wear is a common phenomenon in the industrial field and daily life. There are many physical and chemical and mechanical reasons for this phenomenon, mainly abrasive wear, adhesive wear (glue), fatigue wear (pitting), and corrosion wear. An important cause of material and energy losses. The problem of wear involves a wide range. Material abrasion resistance, as an engineering study, is aimed at the problem of abrasion during product manufacturing and product production, as well as research on technological measures and methods to prevent or reduce abrasion. Studying the history of wear is closely related to the development of tribology. According to China's national conditions and the needs of economic development, combined with various wear problems in the industrial field, vigorously carrying out research on basic theories and practical applications of wear will make a huge contribution to China's economic construction.

1. Weight loss method: A chemical balance is used, and the average value is adopted. The characteristics are: the sensitivity is high, and the sample should be cleaned and kept dry.

Abrasion resistance is related to almost all properties of the material, and under different abrasion mechanism conditions, there are different requirements for material properties in order to improve wear resistance. due to

1. Hardness: The abrasion resistance of metal materials can be measured by the hardness of the material. This is mainly because the hardness of the material reflects the material's ability to resist the material being pressed into the surface. The material with a high hardness is pressed into the surface of the material at a shallow depth, and the grinding volume generated by cutting is small, that is, the wear is small and the wear resistance is high.

2, the crystal structure of the crystal's mutual solubility: densely packed hexagonal lattice metal materials, even if the friction surface is very clean, its friction factor is still 0.2-0.4, the wear rate is also low.

3. Temperature: Temperature mainly changes the wear resistance of metal materials through the influence of hardness, crystal structure transformation, mutual solubility and increasing oxidation rate. The hardness of metal usually decreases with the increase of temperature, so the temperature increases and the wear rate increases.

4. Plasticity and toughness: High plasticity and toughness indicate that the material can absorb large energy, cracks are not easy to form and swell, and the material has a large ability to deform repeatedly, and it is not easy to form fatigue spalling, that is, good wear resistance.

5. Strength: During the abrasion process, the metal matrix has high strength, which can provide good support against the wear-resistant hard phase, and give full play to the ability of the wear-resistant hard phase to resist wear, so that the wear-resistant material shows excellent wear resistance.

6. Metallurgical defects such as inclusions: Metallurgical defects such as non-plastic inclusions in steel have a serious impact on fatigue wear.

7. Surface roughness: Under the condition of constant contact stress, the smaller the surface roughness value, the higher the resistance to fatigue wear. When the surface roughness is as small as a certain value, the effect of anti-fatigue wear ability will be reduced.

The durability of paper when subjected to the friction of rubber, sandpaper and similar objects is also called abrasion resistance. Characterize the surface hardness of the paper. This property is expressed by the weight loss rate of the paper when the paper is rubbed with a standard friction material under a specified load and moving rate. Some papers that require surface hardness, such as cardboard and writing paper, generally use starch or

Abrasion resistance

Coating abrasion resistance in the coating industry refers to the resistance of the coating to frictional mechanical effects. It is actually a reflection of the combined effects of hardness, adhesion and cohesion of the coating. Under the same conditions, the wear resistance of the coating is better than that of metal materials. Because of its viscoelastic effect, it can buffer, absorb and release energy. The abrasion resistance is usually measured with a coating abrasion meter. Under a certain load, the coating film is polished with a specified number of revolutions, and the weight loss of the coating film is obtained, which is expressed in grams.

Abrasion resistance

Fabric abrasion resistance refers to the resistance of the fabric to abrasion. Abrasion refers to the phenomenon that the fabric is often damaged by repeated friction of other objects during use. The abrasion resistance of a fabric is mainly measured by the number of flat wears. In the case of the same yarn structure, yarn number, and density of the fabric, the number of flat grinding times is mainly related to the friction support area of the fabric, that is, the larger the friction support area, the higher the number of flat grinding.