Machinery and equipment used in our life: has its advantages and disadvantages, to introduce below reason bite machine normal fault. Bite machine has the wear resistance, cracking resistance, corrosion defect.
In in 1, bite machine wear due to moving parts wear, at some time beyond the limit values caused by defects. The so-called wear refers to the machinery in the operation process, dual surface contact each other do mutual movement, attack in conflict under standard, shape and surface quality change representation.
In in 2, bite machine cracking first can be divided into mechanical fatigue cracking, thermal fatigue crack and plastic cracking etc..
In the mechanical fatigue crack: crack in metal composite load fatigue fatigue caused by the bending fatigue, fatigue, contact fatigue, the change.
In the thermal fatigue cracking in: metal cracking caused by high temperature fatigue etc..
In: plastic cracking: plastic cracking is caused by overload fracture and impact cracking.
In in 3, bite machine corrosion defects is the main means of metal corrosion.
In common in metal corrosion situation has eight kinds: uniform corrosion, galvanic corrosion, crevice corrosion, pitting corrosion, intergranular corrosion, selective corrosion, wear corrosion, stress corrosion.
Reason: in the metal corrosion can be divided into chemical corrosion, electrochemical corrosion and corrosion of three kinds of physics.
In the chemical corrosion: corrosion in the metal and the surrounding medium directly attack the chemical reaction.
In the electrochemical corrosion: corrosion in metal and dielectric solution electrochemical reaction which attack. The reaction process in the current episode.
In the physical in the corrosion: metal and molten salt, alkali melting, liquid metal contacts, so that a region of metal melting, image transfer to another region continue to constitute the material, namely physical corrosion.