Ultra-high tensile steel vehicle door anti-collision joist and method of manufacture
A technology of ultra-high-strength steel and automobile doors, which is applied in the field of ultra-high-strength steel automobile door anti-collision beams and its manufacturing, can solve the problems of difficult implementation and large investment in equipment, and achieve the effect of avoiding cracking and ensuring accuracy and strength
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[0024] See figure 1 , figure 2 with image 3 , The beam body 1 of the ultra-high-strength steel automobile door anti-collision beam of the present invention is a steel plate formed integral member with a "U"-shaped cross section. The beam body is in a slender shape and the main positioning is provided on the right part of the beam body. The hole 6, the left part is provided with an auxiliary positioning hole 7, and the left and right ends of the beam body are respectively provided with welding lap surfaces 10 and 11;
[0025] The material of beam 1 is ultra-high-strength steel, and its composition contains C=0.11%, Si=0.20%, Mn=1.6%, P≤0.015%, S≤0.002%, Al=0.04%, Nb≤0.015%, Its yield strength is greater than 950Mpa, and its tensile strength is greater than 1200Mpa. The selected material is Docol 1200M (produced by SSAB, Sweden), which is an ultra-high strength steel plate.
[0026] See Figure 4 The ultra-high-strength steel car door anti-collision beam body 1 of the present inv...
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