總結(jié)：

隨著各種碰撞機(jī)構(gòu)對車輛安全要求的不斷提升，汽車的安全性也在快速地被提高和完善

英文版：

Safety is the performance indicator that people who buy a car will hang on their lips every day. When you buy a car, the sales will tell you how many airbags, active brakes, pre-crash alarms, and some sales. I will also tell you how much thermoformed steel is used in this car. Thermoformed steel is one of the more and more car companies that will be mentioned when doing passive safety introduction. Even if you don't know if it is awkward, you can judge by this degree of attention: it must be very important! But we can't be so casual, not only do we have to know it, but we also know why, so I will take you to understand in depth that this thermoformed steel is awkward, why this is valued.



Where does thermoformed steel generally appear?



Thermoformed steel is stronger than ordinary high-strength steel:



The tensile strength of general high-strength steel sheets is about 400-450 MPa. The hot-formed steel is formed by heating. After a series of treatments, the tensile strength can be increased to 1300-1600 MPa, which is 3-4 times that of ordinary steel.







According to the strength grade, the steel with a yield strength greater than 210 MPa and less than 510 MPa, and a tensile strength greater than 270 MPa and less than 700 MPa is called high-strength steel (210 MPa < yield strength < 510 MPa, 270 MPa < tensile strength 700 MPa); yield strength is greater than 510 MPa, resistance Steel with tensile strength greater than 700 MPa is called ultra high strength steel (yield strength > 510 MPa, tensile strength > 700 MPa).



Of course, the staff of the staff did not say so. The composite materials are good and the quality is lighter. However, due to cost considerations, the general models are rarely used.




So what effect does these thermoformed steels have on the body?

















Thermoforming process

Compared to conventional cold forming techniques, thermoforming technology is characterized by a constantly changing temperature field on the processed sheet. Under the action of the temperature field, the basic microstructure and mechanical properties of the sheet change, which leads to the change of the stress field of the sheet, and the stress field of the material acts on the temperature field. Therefore, the thermoforming process is the coexistence of the temperature field and the stress field inside the sheet. Mutual coupling process.



to sum up:

With the continuous improvement of vehicle safety requirements by various collision mechanisms, the safety of automobiles is also rapidly improved and improved. Firstly, it is equipped with active safety, which can prevent accidents from happening, followed by passive safety. The last line of defense to protect passengers is also due to the increasingly strong and safe use of high-strength steel. At the same time, because of the higher cost performance of thermoformed steel compared to other materials, its use has also been popularized in more entry models in recent years. The most suitable welding process and equipment for thermoformed plates is the medium frequency AC/DC spot welder and welding process provided by Rongshijie! Please contact Kunshan Rongshijie for details!

日文版：

安全性は