Preparation technique for magnetostriction TC4 alloy bar special for dental department

Abstract

The invention discloses a preparation method for a magnetostriction TC4 alloy bar special for the dental department. According to the preparation method, zero-grade special sponge titanium, pure AL beans and AL85V particles are used as alloy elements, proportioning is conducted according to marked honorary alloy elements, an electrode is manufactured through pressing for assembly welding, and smelting is conducted three times through a vacuum consumable electro-arc furnace, so that an alloy ingot with the specification being phi 300*Lmm is obtained. The (alpha+beta) / beta phase transformation point (TB) of the alloy ingot is measured through a metallographic phase method. An ingot bottom of a cap opening is removed through surface peeling of the ingot, the ingot is heated to a beta phase region in the electro-arc furnace, and cogged and forged in a 2500-ton oil press, surface defects are coped, and then the ingot is heated to a two-phase region. Rolling is conducted twice, so that a bar blank with the specification being phi 17*L is prepared, the bar blank is heated through the electro-arc furnace (at the temperature below the phase transformation point) and subjected to multi-mold drawing till the specification is over phi 12.5*Lmm, and the total drawing deformation is not smaller than 40%; and then annealing, straightening, polishing and heat treatment are conducted. The TC4 alloy bar prepared through the technique is made into a vibrating work head for the dental department, and the vibrating characteristic of the TC4 alloy bar cannot be achieved by other metal materials; and the TC4 alloy bar is stable in performance and good in strength and plasticity matching.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal processing, and in particular relates to a preparation process of a magnetostrictive dental special TC4 alloy rod. Background technique [0002] The metals used in dentistry began with amalgam and metal crowns in the 1920s. In the 1960s, gold, silver, and palladium alloys were mainly used. After the 1970s, stainless steel became the most commonly used material for permanent and removable appliances for orthodontics. In the 1990s, Titanium casting technology can be popularized and applied. Among the metal materials used for human hard tissue repair, the elastic modulus of titanium is the closest to that of human tissue, about 80-110GPa, which can reduce the mechanical incompatibility between metal implants and bone tissue. The thermal conductivity of titanium is the lowest among all dental restoration materials. Low thermal conductivity can reduce thermal stimulation to the crown and pulp...

AI Technical Summary

Problems solved by technology

[0005] Traditional metal materials (copper, aluminum, stainless steel, titanium and titanium alloys) cannot meet the vibration requirements of the magnetostrictive dental treatment head

Even if the chemical composition, mechanical properties, high-magnification structure and other parameters of the material of the same TC4 grade are completely consistent, the effect of vibration cannot be guaranteed.

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