Petrol Car parts repair quality evaluation index

The evaluation indicators for the repair quality of Petrol Car parts are: the bonding strength between the repair layer and the base metal, the wear resistance of the repair layer, and the effect of the repair layer on the fatigue strength of Petrol Car parts.

1. The bonding strength between the repair layer and the matrix
The bonding strength can be divided into tensile, shear and torsion resistance, peeling resistance, etc. according to the stress conditions;
2. Wear resistance of repair layer
The wear resistance of the repair layer is a very important indicator in the repair process of Roewe Car parts;
3. Effect of repair layer of Petrol Car parts on fatigue strength
Through the test of the influence of various repair and repair layers on the fatigue strength of the No. 45 steel (normalized) test bar, it was found that various repair layers will reduce the fatigue strength of the test bar, among which the impact of arc spraying is the smallest reduction by 14%. Chrome plating has a greater impact, reducing it by 25%.
The so-called selection of repair methods for Roewe Car parts is to study the repair methods that can achieve good results under given conditions. When choosing, the following points should be considered: technological advancement and process rationality; quality reliability; and economic rationality.
1. Technical advancement and process rationality
It means to continuously adopt new technologies and new processes when possible;
2. Quality reliability
It means that the quality of the repair layer must pass the test, be able to withstand the test of use, and meet the technical requirements for the repair of Petrol Car parts;
3. Economical cost-effectiveness
It means that when determining the repair method of Petrol Car parts, it must be economically sound, that is, calculate the economic accounts and conduct cost accounting. At this stage, due to the enhanced manufacturing capacity of Petrol Car parts, the improvement of technical level and the improvement of production efficiency, the cost of Petrol Car parts has been reduced.
Therefore, when a Petrol Car is repaired, it is common to replace Petrol Car parts. Only some important basic parts are repaired during repairs, and when parts are in short supply, they are repaired in order to save time.