Titanium alloy forging processing temperature control and processing technology

What are the titanium forging processing technologies? The continuous improvement of production technology has also brought performance advantages to many forging materials. Titanium alloy forgings are a relatively common processing material and can be applied in many fields. Titanium forging processing will also Improve durability, in today's manufacturing industry, the processing of titanium alloy forgings is undoubtedly a challenging task. Its unique physical and chemical properties make the control of processing temperature a key technology. So how to accurately control the processing temperature while ensuring the quality of forgings? Let's take a look at the processing temperature control and processing technology of titanium alloy forgings.

The composition of bright spots and dark spots on titanium forgings is different. The bright spots show a high content of titanium oxide, and the dark spots show a high content of carbon. The thickness of the two layers of titanium alloy material reaches 3 μm and does not overlap each other. It is believed that the thick surface layer of such titanium forgings is the result of lengthy intermediate heat treatments during wire production. Therefore, the most likely scenario is that annealing for 15 minutes has no effect on changing the properties of the composition. The presence of carbon on the surface of the wire may be due to the graphite-containing lubricant used during the drawing process, staying on the surface of the wire and then sticking during the annealing process.

The same effect was observed in the machining of titanium forgings, where impurities appeared on the surface after several cycles of processing due to lubricants. The polished surface has a uniform composition. The entire wire is covered by an oxide layer with a thickness of less than 20 nm. According to this, this must positively affect the corrosion resistance under dynamic conditions, since a thin oxide layer shows greater flexibility and can adapt to the conditions applied. load on the material. The negative is the presence of nickel in the surface layer, albeit in small amounts. The subsequent annealing of the material promotes the formation of a nitrous oxide layer with a depth of up to 80 - 150nm to 50 - 60nm without nickel, which may positively affect the corrosion resistance of the material, which is also related to the heat treatment, which leads to the formation of titanium and nickel The mixed surface layer consists of oxides and causes the thickness of the oxide layer to grow.

The mechanical properties of the specimen with a working part length of 45 mm were measured under static tensile conditions on a titanium forging universal testing machine with a loading speed of 2 mm/min. Base diameter is used in strength performance calculations. Test 3 - 5 samples at each experimental point. The conventional yield strength σ0.2, ultimate strength σu and relative elongation mechanical tensile test results show that annealing has a positive impact on the strength properties of the alloy in the structural state. The strength properties of the nanostructure are better than those of the microstructure titanium alloy material. Strength performance is 1.3 ~ 1.5 times higher. Polishing the stretched titanium alloy material wire can improve the static properties of the nanostructured alloy by 18%. The relative elongation of all samples was 51-53%.

The processing of titanium forgings will result in materials with better performance. Many products will have better effects on equipment manufacturing and application after forging. If you want to forge materials, you need to find our professional manufacturers.

Titanium alloy, with its excellent mechanical properties, good corrosion resistance and low density, is widely used in aviation, aerospace, medical and other fields. However, the processing of titanium alloys is difficult and costly, especially during forging processing. Temperature control is crucial to ensure the quality of forgings. If the temperature is too high, the grains will become coarse and the mechanical properties will decrease; if the temperature is too low, grain boundary reactions will occur, affecting its service life. Therefore, how to accurately control the processing temperature has become the key to processing titanium alloy forgings.

⑴ Preheat. Before titanium alloy forgings are processed, they need to be preheated to reach a certain temperature. This can reduce the temperature stress during processing and avoid cracks. The preheating temperature is generally controlled at 800-1000°C, and the specific temperature needs to be determined according to the thickness and material properties of the forging.

⑵ Control the forging temperature. Forging temperature is the core temperature during the processing of titanium alloy forgings, which directly affects the grain structure and performance of the forgings. Generally speaking, the forging temperature should be controlled in the β phase region to ensure grain refinement. For common titanium alloys, such as TC4, TC6, etc., the forging temperature is generally controlled at around 850-950°C.

⑶ Control the cooling speed. After the forging is processed, it needs to be cooled to make it enter a stable state as soon as possible. The control of cooling rate should be determined based on the thickness and material properties of the forging. Generally, it should not be too fast to avoid residual stress.

An aviation company successfully achieved precise control of processing temperature through the above three methods during the processing of titanium alloy forgings. In the preheating stage, they used infrared thermometers to monitor the forgings in real time to ensure the accuracy of the preheating temperature; in the forging stage, they used a gas protective furnace to accurately control the forging temperature; in the cooling stage, they used water cooling to control cooling speed. Through the above measures, they successfully improved the quality of forgings and reduced production costs.

Controlling the processing temperature of titanium alloy forgings is the key to ensuring the quality of forgings. By preheating, controlling forging temperature and cooling rate, precise control of processing temperature can be achieved, thereby improving the quality of forgings.

Hyperwell Metal Materials Technology Co., Ltd. specializes in the research and development, production, processing and sales of titanium metal materials at home and abroad; its products cover various titanium metal materials such as titanium rods, titanium plates, pipe fittings, wire materials, titanium forgings and fasteners. . The products are mainly used in petrochemical, aerospace, chlor-alkali, industrial chemicals, sewage treatment, desalination and other fields, and are exported to well-known domestic and overseas enterprises.