The blank preparation process in the titanium plate processing process

Titanium is a very active metal element that can interact with all elements. During heating, titanium can interact with oxygen to form an oxide film on the surface. At different heating temperatures, the structure and properties of oxide films are different. The thermoforming of titanium plate is more complicated, and the mechanical properties of each batch are different. In order to ensure the quality of the material, the manufacturer has a certificate of conformity and a test report.

1. Preparation of Gr1 Gr2 Gr3 Gr4 titanium plate requires raw material supply status

One-time deformation of titanium plate—rolled into plate in metallurgical factory, the repeatability of performance is poor. The mechanical properties of titanium plates of the same composition produced domestically and abroad are not small; the properties of plates produced by different domestic factories will not be the same, even if the products of a factory, the mechanical properties of different furnace numbers are not the same. Therefore, in order to ensure the quality of parts, the quality of raw materials should be ensured first. The titanium and titanium alloy sheets used from the warehouse shall be equipped with the factory's delivery certificate and the factory's re-inspection certificate. In order to facilitate verification in the future, the certificate of conformity should be kept. When necessary, the workshop can make a record of the basic situation of the parts manufactured from each sheet for future reference.

All plates are required to be supplied in an annealed state. In order to ensure the quality of the parts, the oxide layer and other pollution on the surface of the plate should be removed. The surface of the titanium plate must not have defects such as cracks, peeling, folding, inclusions, etc., and traces of pickling. The sheet should be straight and packed out of the warehouse. During the subsequent blanking, forming, assembly, transportation and storage, care should be taken to prevent surface scratches.

2. Blank cutting of Grade 6 Titanium plate

The wool preparation methods used in various sheet metal parts have many similarities. Since the thickness of the titanium plates used is generally less than 2 mm, and there are few parts with a thickness of more than 1.5 mm, the blanking of the titanium plates can be carried out at room temperature using existing equipment.

When blanking, care should be taken to make the edges of the wool as smooth as possible, especially to prevent defects such as cracks, gnaws, and shear marks on the edges, and more attention should be paid when cutting thick plates.

The wool should be deburred and sharp edges removed before forming. Since the titanium plate is highly sensitive to crack propagation, this work is extremely important to eliminate stress concentration and prevent the wool from cracking and scratching the mold during forming. It can be deburred or polished by filing, belt sanding or sandpaper.

It should be noted that no matter which method is used to cut the material, only ink and pens that do not cause pollution can be used when marking the line. Steel stamps are not allowed on the wool, and only offset printing or special labels can be used.

3. Degreasing and cleaning before forming

Before any thermoforming, grease or other dirt on the surface should be removed to avoid contamination of titanium during heating. In addition, the oxides on the surface of the wool will reduce the plasticity of the material and should be removed before forming. Therefore, in order to reduce various effects in the atmosphere environment, vacuum quenching furnaces and vacuum annealing furnaces are generally used for heating. The inert gas in the vacuum furnace can protect titanium and titanium alloy materials from pollution during the heating process.

Craftsmanship:

Hot forging is a forging process carried out above the metal recrystallization temperature.

Hot rolling is a rolling process performed above the recrystallization temperature.

Cold rolling: The rolling process in which the plastic deformation temperature is lower than the recovery temperature.

Annealing: A metal heat treatment process in which the metal is slowly heated to a certain temperature, maintained for a sufficient time, and then cooled at an appropriate rate (usually slow cooling, sometimes controlled cooling).

Pickling: Immerse the workpiece in an aqueous solution such as sulfuric acid to remove oxides and other films on the metal surface. It is the pretreatment or intermediate treatment of electroplating, enamel, rolling and other processes.