Dalian marine parts market is not mature in China. In terms of parts categories, China is quite different from Europe and the United States. There are only two types of parts in Europe and America: original parts and homogeneous parts. In China, in addition to the original accessories provided by 4S stores and the introduction of homogeneous accessories in recent years, the auto parts market is also full of all kinds of counterfeit accessories. Although the punishment has been increased in recent years, it is still not enough to make the counterfeit accessories disappear. In the process of supervision, European and American parts industry associations have played an important role, but domestic industry associations have played little role in this regard.
The nonstandard parts market also restricts the expansion of post market business to a certain extent. The carburizing heat treatment equipment of automobile parts mainly includes box type multi-purpose furnace, single row, double row and multi row continuous furnace, vacuum (low pressure) carburizing high-pressure gas quenching furnace, etc. Over the past decade, the important symbol of the development of carburizing heat treatment technology is the application of sensing technology and computer technology in production. The process parameters of carburizing heat treatment, such as temperature, time, carbon potential, quenching process and action program, can be fully automatically controlled. Even according to the technical requirements, material brand and characteristics of parts, the system can automatically generate processes and realize intelligent control.
The copper bearing shell needs a very thin layer of grease between Bush and rotating shaft. If the lubrication is poor, there is friction between Bush and the rotating shaft, and the friction will directly produce a very high temperature. Although Bush is rubbed by special high-temperature alloy materials, the direct temperature will be enough to burn it. Bush may also be too heavy due to excessive temperature, abnormal oil viscosity or impurities and other factors. The sliding bearing of the rear upper plate is damaged. The heat treatment of metal heat treatment process is divided into intermediate annealing, finished product annealing and solution aging treatment. After hot rolling, the billets are usually not subject to intermediate annealing, but only used when they are not fully heat deformed and hardened.
Intermediate annealing makes the structure recrystallized for cold working. Annealing can improve the structure, eliminate the residual stress, and control the mechanical properties of products. Generally speaking, the first two years of a car's use are the peak of its life. As long as routine maintenance is carried out, there is basically no problem. The main maintenance work includes: changing the engine oil, checking the steering gear, checking and replacing the brake skin, replacing the four filters, etc. Due to the limited service life of the car, in China, the car is generally retired in 10 years. If it is properly maintained, the car can fulfill its mission on schedule.
In addition, most automatic transmission vehicles should also repair the automatic transmission at this time. Of course, the chassis system should also be carefully inspected and repaired. In general, this stage is dominated by inspection, replacement and maintenance. Domestic components are going through a critical period of independent breakthrough and penetration. With the rapid growth of domestic parts and components, different types of parts and components have made breakthroughs to varying degrees, and the penetration rate of independent brands has increased significantly. From the perspective of class a parts and components, the penetration rate of independent brands basically exceeds 50%, which indicates that the localization substitution of raw material parts and components has been basically completed and has been able to perform well in the international competition.
