Method for adding iron in titanium and titanium alloy ingots

Abstract

The invention discloses a method for adding iron in titanium and titanium alloy ingots. A traditional method is characterized in that iron nails, iron powder or iron intermediate alloys are added intoa raw material, and then mixed and pressed into an electrode, and unlike the traditional method, the method for adding iron in the titanium and titanium alloy ingots is characterized in that iron elements missing in titanium and titanium alloys needing to be prepared are added as long iron wires, so that the distribution uniformity of the iron in the axial direction of the electrode is improved,and reverse segregation distribution is achieved by utilizing the position, the diameter and the length of the iron wires; meanwhile, the difficulty of iron adding when the electrode is formed by non-mixed pressed electrode blocks such as reclaimed material ends is overcome, difficulties in batching calculation and implementation are small by adding the iron wires, and only a small amount of manual work is added without influence on electrode molding and group welding efficiency; and the cost of the iron wires is much less than that of the iron intermediate alloys, and therefore the productioncost can be reduced.

Description

technical field [0001] The invention relates to the technical field of titanium and titanium alloy preparation, in particular to a method for adding iron to titanium and titanium alloy ingots. Background technique [0002] The existing method of adding iron to titanium and titanium alloys, because the density, shape, particle size of iron (iron nails, iron powder, iron beads, short iron wire or iron intermediate alloy) is quite different from that of the matrix sponge titanium, when mixing materials Iron may be locally enriched in the electrode block, resulting in uneven iron distribution during mixing, and even a part of iron loss during electrode preparation. The use of iron-containing master alloys to add iron is a solution, but the cost of iron-containing master alloys is high, and the distribution of various elements is difficult, and it cannot fundamentally solve the problem of uneven mixing. [0003] Iron is easy to segregate in titanium and titanium alloys, which is...

AI Technical Summary

Problems solved by technology

[0002] The existing method of adding iron to titanium and titanium alloys, because the density, shape, particle size of iron (iron nails, iron powder, iron beads, short iron wire or iron intermediate alloy) is quite different from that of the matrix sponge titanium, when mixing materials Iron may be locally enriched in the electrode block, resulting in uneven iron distribution during mixing, and even a part of iron loss during the electrode preparation process

Using iron-containing master alloys to add iron is a solution, but the cost of ferrous master alloys is high, and it is difficult to distribute the components containing multiple elements, and it cannot fundamentally solve the problem of uneven mixing

[0003] Iron is easy to segregate in titanium and titanium alloys, which is affected by the concentration difference of iron in the liquid phase and solid phase of titanium and titanium alloys, and has nothing to do with the type of raw materials added. The main method to solve the problem of iron segregation in electrode preparation is reverse Segregated cloth, but the current method of reverse segregation cloth is more complicated, it is necessary to prepare reverse segregation mandrel or adopt multiple cloth methods, which increases the cost or increases the difficulty of operation

[0004] In addition, when the consumable electrode is made of bulk material instead of sponge titanium (master alloy) mixture, it may be necessary to adjust its overall or local iron content, and it is extremely difficult to add iron according to the existing method

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