Manufacturing method for titanium and titanium alloy products by coating and forming

Abstract

The invention discloses a manufacturing method for titanium and titanium alloy products by coating and forming, wherein the needed devices during a production process comprise an electric furnace, a forming machine and an infrared thermometer. The manufacturing method comprises the following steps of coating by choosing steel or pure titanium; selecting single-layer coating or double-layer coating; performing blank verification, oxidation resistance, lubrication and heating before forming, and preheating a die to be about 200 DEG C before forming; rapidly transferring the heated coated blanks onto a pressure machine for forming, and forming by 1-2 heating numbers; and measuring the temperatures of the surfaces of the blanks by the infrared thermometer during the forming process, so as to ensure that the temperatures of the blanks are always kept in a titanium alloy hot-forming temperature range during forming, and finally obtaining the titanium and titanium alloy products. Hemispherical shells manufactured by the manufacturing method disclosed by the invention meet requirements on various technical indexes with low manufacturing cost; the forming heating numbers are reduced to be 1-2 from the previous 2-3, so that the production efficiency is improved and the production cost is reduced; and the thinning rate of the material is reduced, and the utilization ratio of the material is increased.

Description

technical field [0001] The invention relates to a metal material thermal processing technology, in particular to a manufacturing method for overmolding titanium and titanium alloy products. Background technique [0002] Due to the characteristics of low density, high specific strength, good heat resistance and excellent corrosion resistance, titanium and titanium alloys have been widely used in aviation, aerospace, navigation, petroleum, chemical industry, electric power, medical treatment, sports and other fields. However, compared with other metals and their alloys, titanium and titanium alloys have many different thermal processing characteristics. The main features are: [0003] (1) High deformation resistance; [0004] (2) The tendency of cold work hardening is obvious; [0005] (3) Narrow molding temperature range; [0006] (4) It is easy to absorb harmful gases; [0007] (5) Easy to stick to the mold; [0008] (6) Easy to form α hard and brittle layer. [0009] ...

AI Technical Summary

Problems solved by technology

[0021] The technical problem to be solved by the present invention is to provide a manufacturing method for overmolding of titanium and titanium alloy products, which can solve the problem of thermal processing of titanium and titanium alloy hemispherical shells, heads and other products with relatively thin thickness and large deformation; For titanium and titanium alloy products with a thickness of δ>5mm, overmolding is used to improve the material utilization rate and product qualification rate of titanium and titanium alloy products, reduce the heat forming times to improve forming efficiency, reduce costs and improve production efficiency; for thickness δ≤5mm Titanium and titanium alloy hemispherical shells and heads are overmolded to achieve good results that cannot be achieved by ordinary molding methods

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