Honda Develops New Technology to Join Steel and Aluminum with Wo

Honda Develops New Technology to Join Steel and Aluminum with World's First
Application to the Door Panel of Mass Production Vehicles 
- To reduce vehicle weight to improve fuel economy and dynamic performance - 
Tokyo, Feb 18, 2013 - (JCN Newswire) -  Honda Motor Co., Ltd. today announced
that it has newly developed a technology to join steel and aluminum and applied
it to enable adoption of aluminum for an outer door panel, which has
conventionally been made of steel. Honda will adopt this technology first to
the North American version of the all-new Acura RLX, which will go on sale in
the United States in March 2013, and will expand application sequentially to
other models. 
To join together the dissimilar metals of steel and aluminum, the simultaneous
establishment of several different technologies was required such as
technologies to prevent corrosion (electrical corrosion) and thermal
deformation caused by the different expansion rates of steel and aluminum. 
Honda newly developed three technologies that enabled adoption of aluminum for
the outer door panel. 
1) Technology to join dissimilar materials: adoption of "3D Lock
Seam" structure, where the steel panel and aluminum panel are layered and
hemmed together twice. 
2) Technology to prevent electrical corrosion: adoption of highly
anticorrosive steel for the inner panel and a new form that assures the
complete filling of the gap with adhesive agent. 
3) Technology to control thermal deformation: adoption of adhesive agent with
low elastic modulus and optimized position of the 3D Lock Seam. 
The advantages of these new technologies include elimination of a spot welding
process required to join conventional steel door panels. Moreover, these
technologies do not require a dedicated process; as a result, existing
production lines can accommodate these new technologies. 
The new technology contributes to the improvement of fuel economy and dynamic
performance of the vehicle by reducing door panel weight by approximately 17%
compared to the conventional all-steel door panel. In addition, weight
reduction at the outer side of the vehicle body enables to concentrate the
point of gravity toward the center of the vehicle, contributing to improved
stability in vehicle maneuvering. 
Honda has been making a number of efforts to further reduce vehicle weight. In
2012, with the North American version of the all-new 2013 Accord, Honda began
mass-production of a front subframe featuring the steel-aluminum hybrid
structure that was made possible by the Friction Stir Welding (FSW) technology. 
About Honda 
Honda Motor Co., Ltd. (TSE:7267/NYSE:HMC/LSE:HNDA.L) is one of the leading
manufacturers of automobiles and power products and the largest manufacture of
motorcycles in the world. Honda has always sought to provide genuine
satisfaction to people worldwide. The result is more than 120 manufacturing
facilities in 30 countries worldwide, producing a wide range of products,
including motorcycles, ATVs, generators, marine engines, lawn and garden
equipment and automobiles that bring the company into contact with over 19
million customers annually. For more information, please visit 
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