Christiansen Thomas Lundin,Hummelshoj Thomas Strabo,Somers Marcel A. J.
申请号：
US201214113720
公开号：
US9574248(B2)
申请日:
2012.04.27
申请国别(地区):
美国
年份:
2017
代理人:
Harness, Dickey & Pierce, P.L.C.
摘要：
The invention relates to a method for method for formation of expanded austenite and/or expanded martensite by solution hardening of a cold deformed workpiece of a passive alloy, which method comprises a first step of dissolving at least nitrogen in the workpiece at a temperature T1, which is higher than the solubility temperature for carbide and/or nitride and lower than the melting point of the passive alloy, and a subsequent second step of dissolving nitrogen and/or carbon in the work piece at a temperature T2, which is lower than the temperature at which carbides and/or nitrides form in the passive alloy. The invention further relates to a member, such as a lock washer for securing bolts or nuts prepared using the method.
