Tips for surface treatment of titanium forgings for aviation oil!

The density of titanium alloy is small, so the inertia of titanium liquid flow is small, and the fluidity of molten titanium is poor, resulting in low casting flow rate. The temperature difference between the casting temperature and the mold (300°C) is large, the cooling is fast, and the casting is carried out in a protective atmosphere. Defects such as pores on the surface and inside of the titanium casting will inevitably appear, which has a great impact on the quality of the titanium casting. Next, the titanium forging The surface treatment tips are organized as follows:

1. Removal of the surface reaction layer

The surface reaction layer is the main factor affecting the physical and chemical properties of titanium castings. Before grinding and polishing titanium castings, the surface contamination layer must be completely removed to achieve a satisfactory polishing effect. The surface reaction layer of titanium alloy flange  can be completely removed by pickling after sandblasting.

1. Sandblasting: For the sandblasting treatment of titanium castings, it is generally better to use white corundum for rough spraying. The pressure of sandblasting is smaller than that of non-precious metals, and it is generally controlled below 0.45Mpa. Because, when the injection pressure is too high, the sand particles impact the titanium surface to produce intense sparks, and the temperature rise can react with the titanium surface, forming secondary pollution and affecting the surface quality. The time is 15 to 30 seconds, and only the sand sticking, surface sintering layer and part of the casting surface and the oxide layer are removed. The remaining surface reaction layer structure should be quickly removed by chemical pickling.

2. Pickling: pickling can quickly and completely remove the surface reaction layer, and the surface will not be polluted by other elements. Both HF-HCl and HF-HNO3 pickling solutions can be used for pickling of titanium, but the HF-HCl series pickling solution has a large hydrogen absorption capacity, while the HF-HNO3 series pickling solution has a small hydrogen absorption capacity, which can control HNO3 The concentration of HF reduces hydrogen absorption, and can brighten the surface. Generally, the concentration of HF is about 3%~5%, and the concentration of HNO3 is about 15%~30%.

2. Treatment of casting defects

Internal pores and shrinkage cavity Internal defects: can be removed by hot isostatic pressing, but it will affect the accuracy of the denture. It is best to use X-ray flaw detection to remove the exposed pores on the surface and use laser repair welding. Surface porosity defects can be directly repaired by local laser welding.

3. Grinding and polishing

1. Mechanical grinding: titanium alloy forged ring has high chemical reactivity, low thermal conductivity, high viscosity, low mechanical grinding ratio, and is easy to react with abrasives. Ordinary abrasives are not suitable for grinding and polishing titanium. It is best to use good thermal conductivity. For superhard abrasives, such as diamond, cubic boron nitride, etc., the polishing line speed is generally 900~1800m/min. Otherwise, grinding burns and microcracks are prone to occur on the titanium surface.

2. Chemical polishing: Chemical polishing is to achieve the purpose of leveling and polishing through the oxidation-reduction reaction of metals in chemical media. Its advantage is that chemical polishing has nothing to do with the hardness of the metal, the polishing area has nothing to do with the structural shape, all parts in contact with the polishing liquid are polished, no special complicated equipment is required, the operation is simple, and it is more suitable for polishing complex titanium denture brackets. However, the process parameters of chemical polishing are difficult to control, and it is required to have a good polishing effect on the denture without affecting the precision of the denture.

4. Coloring

In order to increase the beauty of titanium dentures and prevent the discoloration of titanium dentures from continuous oxidation under natural conditions, surface nitriding treatment, atmospheric oxidation and anodic oxidation can be used for surface coloring treatment to make the surface light yellow or golden yellow and improve the titanium dentures. beauty. The anodic oxidation method utilizes the interference effect of the titanium oxide film on the light to produce natural color, and can form colorful colors on the titanium surface by changing the cell voltage.

New Technology of Titanium Wire Drawing

Titanium wire is one of the metals that are difficult to stretch at room temperature. In the past, graphite resin coating was used, and it could only be stretched in one mold per pass. The surface coating must be removed by pickling before intermediate annealing, especially for wires with a diameter of less than 0.5 mm. , the production process is complicated, the cycle is long, the metal damage is large, and there are silver-white pits on the surface of the wire, and even the mold cannot be stretched due to the sticky mold of the tree. After more than two years of production practice, the titanium wire manufacturer has developed a simple lubricating coating (including lime, soap, garden powder, molybdenum disulfide) for titanium wire stretching, so as to achieve multiple Die stretching new technology. The process has the following characteristics:

New Technology of titanium welding filler wire Drawing

1. Realized multi-mode stretching (up to 7 modes), which greatly shortened the production cycle, increased labor productivity, and increased output by more than 5 times, thereby reducing costs and creating conditions for the civil use of titanium materials.

2. Simplify and shorten the process flow, reduce labor intensity, reduce the amount of industrial acid, and reduce metal loss by about 15%.

3. The surface quality of surgical medical titanium wire is improved (silver-white pitting is eliminated, and stretched surface wire with metallic luster is obtained), and the tolerance of wire diameter is reduced, thereby improving corrosion resistance.

4. In the past, it was difficult to prepare industrial pure titanium wire with a diameter of 0.06 mm. Now, after improvement, it can smoothly stretch industrial pure titanium wire with a diameter of 0.06 mm and titanium alloy wire with a diameter of 0.1 mm, expanding the diameter of the titanium wire. Specifications and scope of use provide corrosion-resistant mesh materials for printing and dyeing, chemical, light industry and other industries.

F3 Pure Titanium Forging Manufacturers, Suppliers, Factory - Buy Best Price F3 Pure Titanium Forging for Sale - HST TITANIUM

F3 Pure Titanium Forging Manufacturers, Suppliers, Factory - Buy Best Price F3 Pure Titanium Forging for Sale - HST TITANIUM: As one of the most professional F3 pure titanium forging manufacturers, suppliers and companies in China, we're featured by quality products and competitive price. Please rest assured to buy cost-efficient F3 pure titanium forging in stock here from our factory. Contact us for more products for sale.

F3 Titanium Forging is a relatively rare pure titanium product with a small range of applications. It is less prone to molding than F1、F2 Titanium Forging, with greater strength and improved corrosion resistance. Used in aerospace and some industries that require medium strength, and uses of petrochemical, food processing, pollution control, pulp and paper.

ASTM B348 Titanium Bar, ASTM B348 Titanium Rod Suppliers - HST TITANIUM

ASTM B348 Titanium Bar, ASTM B348 Titanium Rod Suppliers - HST TITANIUM: As one of the most professional astm b348 titanium bar/rod manufacturers, suppliers and companies in China, we're featured by quality products and competitive price. Please rest assured to buy cost-efficient astm b348 titanium bar/rod in stock here from our factory. Contact us for more products for sale.

Titanium bar/rod—a hot rolled, forged, or cold worked semifinished solid section product whose cross-sectional area is equal to or less than 16 in. (10323 mm); ASTM B348 Round Bar is a very popular go-to for many products.

 

Titanium bar/rod manufacturing state(ASTM B348):

Hot Rolling（R）

Cold Rolling（Y）

Annealing（M）

Solid solution（ST）

Titanium materials can be used in the aviation industry

With the continuous research on titanium metal, it plays an indispensable role in all walks of life. Due to its special characteristics, titanium metal can be used not only in general industry, but also in aviation industry. Today, the editor of Baoji titanium material manufacturer will tell you about titanium metal.

The specific strength (ratio of strength to weight) of titanium and its alloys is the highest among metal structural materials. Its strength is equivalent to that of steel, but its weight is only 57% of that of steel. In addition, titanium and its alloys have strong heat resistance, and can still maintain good strength and stability in an atmosphere of 500 ° C, and the short-term working temperature can even be higher. Aluminum loses its original mechanical properties at 150°C and stainless steel at 310°C.

When aircraft missiles and rockets fly at high speed, the engine and surface temperature are quite high, and aluminum alloy is no longer competent. Titanium alloy is very suitable. It is precisely because Tantalum Sputtering Target and its alloys have comprehensive excellent properties such as high strength, light weight, and strong heat resistance, when they are used in aircraft manufacturing to replace other metals, it can not only prolong the service life of the aircraft, but also reduce its weight, thereby Greatly improve its flight performance. Therefore, titanium is one of the more promising structural materials in the aviation industry and aerospace industry.

The amount of titanium used in aircraft engines has increased, and the fuselage also partially requires titanium. Aircraft with a Mach number greater than 3.5 have a high engine inlet temperature, so they cannot have a high impact strength, and can withstand high pressure and vibration. Therefore, ASTM F67 Gr2 Titanium Plate and its alloys are only used to manufacture engine casings and structural components in rockets, missiles and spacecraft, and are used to manufacture high-pressure containers, such as high-pressure gas cylinders, cryogenic liquid fuel tanks, etc. In addition, titanium and its alloys are used in nuclear reactors and military weapons.

Grade 3 Pure Titanium Sheet/Plate Manufacturers, Suppliers, Factory - Buy Best Price Grade 3 Pure Titanium Sheet/Plate for Sale - HST TITANIUM

Grade 3 Pure Titanium Sheet/Plate Manufacturers, Suppliers, Factory - Buy Best Price Grade 3 Pure Titanium Sheet/Plate for Sale - HST TITANIUM: As one of the most professional Grade 3 Pure Titanium Sheet/Plate manufacturers, suppliers and companies in China, we're featured by quality products and competitive price. Please rest assured to buy cost-efficient Grade 3 Pure Titanium Sheet/Plate in stock here from our factory. Contact us for more products for sale.

Grade 3 pure titanium Plate is a high-purity titanium metal product with similar mechanical and physical properties to Gr1 and Gr2, but with greater strength. Gr3 titanium Plate has excellent corrosion resistance and good weldability. This grade of titanium is used in aircraft fuselage and engine parts.

Grade 12 Titanium Bar, Grade 12 Titanium Rod Factory, Gr12 Titanium Bar for Sale - HST TITANIUM

Grade 12 Titanium Bar, Grade 12 Titanium Rod Factory, Gr12 Titanium Bar for Sale - HST TITANIUM: As one of the most professional grade 12 titanium bar/rod manufacturers, suppliers and companies in China, we're featured by quality products and competitive price. Please rest assured to buy cost-efficient grade 12 titanium bar/rod in stock here from our factory. Contact us for more products for sale. Titanium Grade 12 alloy is similar to Titanium Grades 2 and 3 except that Titanium Grade 12 has 0.3% molybdenum and 0.8% nickel. This offers enhanced corrosion resistance. Moderate Strength Titanium; Excellent Cold Formability; Excellent Weldability; Excellent Resistance to High Oxidation

An overview of the classification and application of titanium wire and the related factors affecting the tensile force!

In recent years, with the continuous research and development of titanium, there are more and more kinds of titanium materials. Titanium wire is one of the common titanium materials in life.

  Generally speaking, titanium and Grade 5 Ti-6Al-4V Titanium Wire refers to titanium products supplied in the form of discs, and some are supplied in the form of straight wires. As far as the diameter is concerned, the division standard of titanium wire and titanium rod is not strict, and each country has different standards. my country's wire standard "GB3623-83" only shows that the diameter of titanium and titanium alloy wire is not greater than 6mm.

1. Classification

According to different properties, titanium and titanium alloys can be used to prepare wires with different requirements, generally divided into: pure titanium wire, titanium alloy wire, pure titanium glasses wire, titanium straight wire, titanium welding wire, titanium hanging wire, titanium disc Wire, titanium bright wire, medical titanium wire, titanium-nickel alloy wire, each has a different purpose. For example, pure titanium spectacle wire is mainly used to make spectacle brackets, titanium hanger wire is used to hang weights, and titanium-nickel alloy wire is commonly used as memory alloy material.

The finished products of titanium and surgical medical titanium wire are generally hard (Y) and annealed (M), and the surface can be divided into pickling surface and bright surface.

2. Application

Titanium wire also perfectly "inherits" the advantages of titanium and titanium alloys, with a series of good corrosion resistance, high specific strength, non-magnetic, high biocompatibility, low impedance to ultrasonic waves and good shape memory function. Excellent characteristics.

Therefore, titanium wire is widely used in many fields such as aerospace, petrochemical, medical and health, automobile, construction, and sports and leisure products.

And in recent years, due to its continuous development, its variety has become more and more diverse, which provides more choices for its application in high-performance industrial products and consumer products.

  3. The main factors affecting the tensile force of titanium wire

With the development of the national economy, the demand for titanium and titanium alloy wire is increasing, and it is currently in a state of short supply, with great potential for development.

  (1) Mechanical properties of metals. Closely related to the yield strength of the metal being stretched. Generally, there is a linear relationship between the yield strength of a stretched metal and the tensile force, that is, as the strength of the stretched metal increases, the tensile force increases.

(2) Degree of deformation. The tensile force increases with the degree of deformation.

(3) Stretching speed. In the practical range of stretching speed, the effect of stretching speed on stretching force is not very obvious. Just at the moment of starting the equipment, the tensile force increases due to the greater acceleration. When the speed is stable, the tensile force does not change with the change of speed.

(4) The length of the sizing belt. Affect the friction force when the metal passes through, the sizing belt increases, and the tensile force also increases.

(5) Mold shape. Die taper and sizing belt length are directly related to tensile force. The increase of the die angle reduces the length of the deformation zone, reduces the vertical pressure and the resulting friction, but the increase of the die angle also increases the deformation resistance in the horizontal direction. When the mold angle is small, the former factor dominates, so the tensile force decreases with the increase of the mold angle; while when the mold angle is large, the latter factor dominates, so the tensile force decreases with the increase of the mold angle increase. Therefore, there is an optimal die angle, and the tensile force is the smallest when stretching at the optimal die angle. Experiments show that the magnitude of the tensile force has a certain relationship with the arc of the mold, but the influence is limited. At the same time, because the manufacture and inspection of the shape of the tapered die hole are relatively easy, the tapered die is often used in production.

  (6) Lubrication and friction conditions. The quality of lubricating conditions and lubricants directly affects the magnitude of the tensile force. The difference in tool material and surface roughness is also related to the change of friction coefficient, which causes the change of tensile force.

Development and Application Market of Low Alloy Titanium Coil

Up to now, the key technology of low-alloy Grade 3 Pure Titanium Foil production is still mastered by several large titanium coil manufacturers abroad, and a domestic company has only begun to conduct in-depth research in recent years and has made preliminary progress. However, a large number of low-alloy titanium coils still need to be imported into China every year, and their price and demand are controlled by others, so as to restrain and stifle the production of domestic low-alloy titanium coils and achieve the purpose of exporting titanium processed products to China and monopolizing the market.

Alloy titanium coils are mainly used in high-tech fields such as aircraft, spacecraft, submarines, nuclear power plants, medical treatment, and high-end racing cars, as well as civil fields such as metallurgy, the chemical industry, and decoration.

At present, a number of complete titanium coil production lines have been built in China, and have begun to take shape, and the equipment strength has far surpassed that of similar foreign manufacturers. In November 2008, with the successful trial production of domestic cold-rolled titanium coils, a complete production chain from sponge titanium, smelting, forging, rolling, finishing treatment, and deep processing was formed. The production technology of titanium coils has been perfected day by day, and a large amount of data and experience have been accumulated for the production of low-alloy wide-width Gr2 Pure Titanium Foil.

Medical industry

Due to its excellent compatibility with the human body, titanium has been used as the material of choice in the medical industry. With the development of the strip market, the medical industry, which used to rely on sheet production to provide raw materials, began to prefer belt production instead, mainly because of the high precision and high consistency of belt production, which can fully guarantee the use in the human body environment. safety, but at the same time, a slightly higher strength index requirement is also proposed, which also promotes the potential of the low alloy market.

civilian market

In recent years, due to the promotion of titanium for construction and titanium for kitchen utensils, the use of titanium in the civilian market has gradually been accepted by people. Everyone has begun to use the proportion of titanium in daily life as a strength of corporate publicity. In emerging markets such as mobile phone cases, laptops, business card holders, and even business cards, titanium has gradually become a tool for publicity and a carrier for information transmission.

pipe

Ti-3Al-2.5V is mainly used as a seamless pipe application. Such tubes can be processed in various crystallographic orientations from radial to axial textures. The diversity of Ti-3Al-2.5V texture provides an effective way to improve performance. Ti-3Al-2.5V was originally developed as a material for welded and seamless pipes. This alloy was later used in some other constructions, but the tubing application still dominates today.

Virtually all commercial airliners now have Ti-3Al-2.5V hydraulic systems, and the alloy is increasingly used in chemical equipment. The chemical equipment made of it can withstand higher operating temperatures, the efficiency is improved, and the environmental impact is significantly reduced, especially the good corrosion resistance in seawater so that it is gradually used in seawater cooling systems and seabed oil exploitation. At the same time, high strength, low density, and good rigidity are excellent materials for developing bicycle frames and golf clubs.