What are automotive fasteners? This question has been answered. Wholesale parts used in automobiles and products with screw connection function are called automobile fasteners. Although auto fasteners are not classified as a special industry, auto fasteners are an industry demanding high quality standards from Ping An. There are thousands of cars running on the road. It is terrible to assume that the quality problem of one screw presents a defect. Therefore, the required qualification rate for the quality of automobile fasteners is 100%. It is not allowed to show that even one screw presents a quality problem.

All automobile consumers have stopped scientific and reasonable design and experiment on the specifications of special automobile screws used. For the automobile screws purchased by Zhenggong, they will stop long-term data archiving and analysis on its data, heat treatment process, physical properties, salt spray time, size specifications, fatigue resistance data, etc. Therefore, the consumption of automobile screws is not as qualified as our conventional industrial fasteners. In order to consume professional automobile screws, in addition to the simple ISO system certification, it is also mandatory to pass the TS16940 certification. In general, the demand for consumption regulation of automobile screws is relatively high, and the investment is relatively large.

Among the automotive screws we are exposed to daily, those used in electronic circuits are relatively easy. The main problem is the connection part of the automobile. As we know, the strength of the screws used in automobiles is 10.9 or above, and the hydrogen embrittlement of such high-strength screws is easy to occur. If they are used in equipment, even if one screw is broken, we can replace it. The loss is not very terrible, but if the screws of automobiles are broken due to hydrogen embrittlement, think about it. The car is running on the road, so we can not describe how risky it is.

From time to time, we say that the hydrogen embrittlement of screws is uncontrollable, but this statement cannot be applied to automobile screws. The hydrogen embrittlement of automobile screws must be zero attack. Therefore, in the design drawings of automobile fasteners, some warnings will be noted to clarify that this is why automobile screws ask for more Dacromet plating. In short, it is to control the non presentation of hydrogen embrittlement.

In application, the causes of hydrogen embrittlement can be handled except for electroplating. Therefore, the electroplating of automobile screws is different from that of conventional screws. After electroplating, the automobile screws need to stop baking for two hours and control its hardness at 27 degrees. Automobile screws must be given a correct and separate plan to stop operation according to its heat treatment conditions, and ensure that the heat treatment staff are trained on the right track before taking up their posts.