Equipment malfunctions can be classified based on technical factors, including wear and tear, corrosion, and cracking.

1. Wear and tear problems
The malfunction caused by the wear and tear of moving parts exceeding the limit value at a certain moment. The so-called wear and tear refers to the phenomenon in which the dual surfaces of machinery touch and move with each other during the operation process, resulting in changes in scale, shape, and surface quality under conflicting effects. According to its composition mechanism, it can be divided into four types: adhesive wear, surface fatigue wear, corrosion wear, and micro vibration wear.

2. Corrosive disease
According to different corrosion mechanisms, it can be divided into three categories: chemical corrosion, electrochemical corrosion, and physical corrosion.

(1) Chemical corrosion: Corrosion formed by direct chemical reactions between metals and surrounding media. There was no current surge during the reaction process.
(2) Electrochemical corrosion: Corrosion formed by electrochemical reactions between metal and dielectric solutions. There is an electric current occurring during the reaction process.
(3) Physical corrosion: The phenomenon of material transport where a metal comes into contact with molten salt, molten alkali, or liquid metal, causing one area of the metal to continuously melt while another area continues to form. This is known as physical corrosion.

In practical production, metal corrosion is often classified differently. There are 8 common corrosion methods, namely uniform corrosion, galvanic corrosion, crevice corrosion, pitting corrosion, intergranular corrosion, selective corrosion, abrasion corrosion, and stress corrosion.

3. Cracking problem
It can be divided into brittle cracking, fatigue cracking, stress corrosion cracking, plastic cracking, etc.

(1) Brittle cracking: can be caused by uneven data properties; Or due to improper processing techniques (such as improper handling in forging, casting, welding, grinding, heat treatment and other technical processes, which can easily lead to brittle cracking); It can also be caused by harsh environments; If the temperature is too low, the mechanical properties of the data will decrease, mainly referring to the decrease in impact toughness. Therefore, it is necessary to choose data with impact values greater than a certain value for low-temperature containers (below -20 ℃). For example, radiation can also cause data embrittlement, leading to brittle cracking.

(2) Fatigue cracking: Cracking caused by various inductive factors such as thermal fatigue (such as high temperature fatigue), mechanical fatigue (further divided into tortuous fatigue, change fatigue, touch fatigue, composite load fatigue, etc.), and fatigue in complex environments.


Article compilation: Jiangmen assembly line www.zs-chsb.com