The following describes the heat treatment stress of high-pressure alloy tubes and their effects:
The appearance of a high-strength high-pressure alloy tube that exhibits a decrease in plasticity and resistance when heated in a hydrogen-rich atmosphere is called hydrogen embrittlement. The high-pressure alloy tube exhibiting hydrogen embrittlement can also eliminate hydrogen embrittlement after dehydrogenation treatment (such as tempering, aging, etc.), and vacuum, low hydrogen atmosphere or lazy atmosphere can be used to prevent hydrogen embrittlement. Of course, some people in practice use this appearance to serve people (such as crushing treatment of alloys, etc.).
The heat treatment residual force refers to the stress remaining in the high-pressure alloy tube after heat treatment, which has an extremely important influence on the shape, size and function of the workpiece. When it exceeds the yield strength of the data, it causes the deformation of the workpiece. When the strength limit of the data is exceeded, the high-pressure alloy tube is cracked. This is the harmful side and should be reduced and eliminated.
However, under certain conditions, the stress is manipulated to make it reasonably dispersed, and the mechanical function and service life of the high-pressure alloy tube can be improved, which is harmful. Analyze the rules of stress dispersion and variation of high-pressure alloy tubes during heat treatment, so that rational distribution has far-reaching practical significance for improving product quality. For example, the question of the impact of the reasonable dispersion of residual compressive stress on the life of the part has led to widespread concern.