PAIR OF GUIDING ELEMENT OF WHICH ON IS MADE OF A SPECIFIC STEEL LEADING TO IMPROVED ANTI-SEIZING PERFORMANCES

摘要

A pair of guiding elements is characterized in that at least one of its elements is made of a steel containing at least 0.15 to 0.3 % by weight of carbon, 2 to 5 % (preferably 2 to 3%) by weight of chromium, at least 0.45 % (preferably no greater than 0.9%) by weight of molybdenum, and at least 0.01 % by weight and no greater than 0.5 % (preferably no greater than 0.3%) of vanadium. This steel is nitrided after being shaped whereby obtaining a compound layer consisting of iron and nitrogen atoms of a thickness ranging from 5 to 50 micrometers. The steel can also contain 0.4 % to 1.5 % by weight of manganese.