The influence of surface treatment on the risks of delayed fracture in high-strength cold headed bolts

The influence of surface treatment on the risks of delayed fracture in high-strength cold headed bolts

$15.00

One way to reduce the risk of delayed fracture in cold-headed high-strength bolts is to limit the penetration of hydrogen into the steel. The authors observed that the highest level of hydrogen inside the steel occurs during the austenitizing treatment, due to the temperature and atmosphere of the furnace. This study confirmed that the presence of phosphate on the surface of the steel can result in the penetration of phosphorus during the heat treatment process, thus leading to embrittlement.

SKU: P05266 Category:

Description

One way to reduce the risk of delayed fracture in cold-headed high-strength bolts is to limit the penetration of hydrogen into the steel. The authors observed that the highest level of hydrogen inside the steel occurs during the austenitizing treatment, due to the temperature and atmosphere of the furnace. This study confirmed that the presence of phosphate on the surface of the steel can result in the penetration of phosphorus during the heat treatment process, thus leading to embrittlement.

Additional information

Author(s)

Bernard Resiak and Mario Confente, Mittal Steel Europe Research Center, and René Cathiard, Pierre Perrin, and Bernard Starck, LISI Automotive, France
Publication/Event/Pages

Paper presented at WAI's 77th Annual Convention (Interwire) in Cleveland, May, 2007. Published in WJI, March 2008, pp. 76-79.
Year

2007

Related products