Method for determining positions of all areas of cross section of industrial pure-titanium fusion welding joint

Abstract

The invention discloses a method for determining the positions of all areas of the cross section of an industrial pure-titanium fusion welding joint. After joint parent metal and a heat affected area are differentiated through metallographic observation and then sufficient heat treatment is conducted, grain growth or recrystallization occurs in the heat affected area, and the heat affected area and a melting area are differentiated according to the characteristics of grain growth. By utilizing the method for determining the positions of all areas of the cross section of the industrial pure-titanium fusion welding joint, all areas of the industrial pure-titanium fusion welding joint can be definitely divided, the effect that the change rules of the formation mechanism and the mechanical property of industrial pure-titanium fusion welding joint microstructures are comprehended in essence is facilitated, and preconditions are provided for subsequent welding fusion joint relevant studies.

Description

technical field [0001] The invention belongs to the field of material welding and metallurgy, and in particular relates to a method for determining the position of each area of ​​a cross-section of an industrial pure titanium fusion welding joint through heat treatment and metallographic observation. Background technique [0002] Due to its strong corrosion resistance and good biocompatibility, industrial pure titanium has been widely used in petrochemical and biomedical fields. In these fields, the extensive use of components with various complex shapes inevitably involves welding problems, and fusion welding (fusion welding) is widely used as the most common welding method, so the study of the structure of industrial pure titanium fusion welding joints Performance is very important. [0003] Industrial pure titanium fusion welded joints are composed of base metal, heat-affected zone and melting zone. During the cooling process, the melting zone of the joint solidifies fi...

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Problems solved by technology

[0004] At present, the industrial pure titanium plate after rolling is generally heat treated, but the joints after welding of industrial pure titanium are not often heat treated, so no one has noticed the possible positive effect of moderate heat treatment on the distinction between the heat affected zone and the melting zone.

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