The use of press hardening steel (PHS) in structural safety-related parts has experienced a rapid growth in the automotive industry, due to increased passenger safety standards, which require an improved vehicle intrusion resistance. Very small concentrations of diffusible hydrogen in ultra-high strength PHS deteriorate their mechanical properties. The focus of the present study was the analysis of the diffusible hydrogen uptake during the hot press forming process of the aluminized PHS and its impact on the mechanical properties of PHS. The effect of the paint baking on the properties of aluminized PHS was also evaluated by mechanical testing and hydrogen thermal desorption analysis. A mechanism for the hydrogen absorption of aluminized PHS was proposed.

由于提高了乘客安全标准，在汽车安全行业中，对结构安全相关部件使用压硬化钢（PHS）的需求迅速增长，这就需要提高车辆的抗侵入性。超高强度PHS中极少量的可扩散氢会降低其机械性能。本研究的重点是分析镀铝PHS热压成型过程中扩散的氢吸收及其对PHS力学性能的影响。还通过机械测试和氢热脱附分析来评估烤漆对铝化PHS性能的影响。提出了铝化PHS的吸氢机理。