China Factory Best Price Chemical Industry Gr2 Gr1 Titanium Foil

Gr2 Pure Titanium Foil Basic Info

Surface

Acid Surface or Polishing

Color

Metallic

Tolerance

H7

Condition

R M Y

Service

OEM, ODM

Packaging

Wooden Cases Suitable for Overseas Shipment

Supply Ability

80tons Per Month

Payment Term

T/T, L/C and So on

Width

<500mm

Trademark

RG TECH

Transport Package

Plywood Box

Specification

Shape Foil Sheet Plate

Origin

China

Product Description

Grade 5 Ti-6Al-4V Titanium Foil Product Information

Item name	Titanium Plate, Titanium Sheet, and Titanium foil
Standard	ASTM B265
Grade	Gr1,Gr2,Gr3,Gr4,Gr5,Gr7,Gr9,Gr12,Gr23 etc.
Technology	Hot rolling, Cold rolling
Test	Ultrasonic test(UT),X-ray test
Thickness	Foil:  ≤ 0.3mm Plate: > 0.3mm
Standard specifications	Width: <1.1m Length: <2.2m Special specifications can be customized
Manufacturing methods	Hot rolling and cold rolling
Annealing temperature:	700~785°C
Size(mm)		Length	Width	Thickness
	Hot rolling	1000~4000	400~3000	4.1~60
	Cold rolling	1000~3000	400~1500	0.3~6

 


 

What are the precautions for grinding TC4 titanium alloy?

Since the titanium alloy material tends to fill the grinding wheel, it brings difficulties to the grinding of titanium alloy rods and Titanium Hot Rolled Sheet. During grinding, the high-temperature rise at the interface between the metal and the grinding wheel causes the grinding surface to have High residual stress, meanwhile, the surface finish is not ideal.

The following methods can be used to basically solve these difficulties:

(1) Choose a suitable grinding wheel, such as a silicon carbide grinding wheel, with medium grain size (60~80), medium hardness (J~M), a surface speed of 700~1200m/min, aluminum oxide (aluminum oxide powder or corundum) The grinding wheel should be used at a lower speed, such as 550~600min. Medium grain size is also required.

(2) Use a lower grinding wheel speed and feed rate; due to the low speed of the grinding wheel, fewer sparks are generated.

(3) Cooling with buffer or cutting fluid coolant, using ceramic bond and chlorinated or vulcanized cutting oil, can get good results. Whatever type of coolant is used, it needs to be well-filtered to eliminate "fishtail" stains due to the recirculation of titanium particles.

(4) Titanium sparks may catch fire when encountering oil mist, but immersing the workpiece in oil can reduce this danger. The anti-rust ammonium nitrite aqueous solution completely eliminates the risk of fire.

But even the best grinding conditions will reduce the fatigue performance of the workpiece

Common surface treatment methods for titanium alloy forgings

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 titanium castings will inevitably appear, which has a great impact on the quality of titanium castings. The following describes titanium alloy forgings surface treatment method.

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 can be completely removed by pickling after sandblasting.

1. Sandblasting: For the sandblasting treatment of F9 Titanium Forging 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 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. the

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 forging has high chemical reactivity, low thermal conductivity, high viscosity, low mechanical grinding ratio, and is easy to react with abrasive tools. Ordinary abrasives are not suitable for grinding and polishing of 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 the parts in contact with the polishing liquid are polished, no special complicated equipment is required, and the operation is simple. 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. the

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.

Comparison of Three Processes for Hot Extrusion of Titanium Alloy Rods

Grade 2 Titanium Round Bar hot extrusion is to extrude the powder under the condition of increasing temperature so that the product can be fully densified. The hot extrusion method can accurately control the composition of the material and the internal structure of the alloy. The hot extrusion method can be divided into two types: the sheathed hot extrusion method and the non-sheathed hot extrusion method.

For active metal titanium and titanium alloy powder, in order to prevent product oxidation, the hot extrusion method is often used. At this time, the sheath is made first, and the powder or compact is packed in the sheath. After pre-drawing and sealing, it is placed in an extruder for hot extrusion.

The wrapping material used at this time should have good thermoplasticity, not form a solid metal with the material, be easy to peel off after hot extrusion, convenient source, and be low cost. Low-carbon steel or stainless steel sheets are mostly used.

6al4v titanium alloy bar hot extrusion is a process that combines forming, sintering, and thermal processing, so as to directly obtain diamond products with better mechanical properties.

The second process is to shape titanium and titanium alloy powder. After sintering, the prepared sintered billet is hot-extruded (for Ti-32Mo alloy, the temperature is 1000-1100° C.), and the properties of the obtained titanium alloy product are obtained. The effect of extrusion ratio on the properties of titanium materials.

The third process of titanium alloy rods is the process of filling billet extrusion, which is an important method that can be used to make complex cross-section products. The process includes: preparing the casing cavity, and determining the size of the cavity according to the required product size plus extrusion coefficient; Putting the powder into the cavity and vibrating; evacuating, exhausting, and sealing the sheath; extruding at a certain temperature and extrusion ratio; peel off the sheath.

Treatment of surface defects after titanium forgings are made into parts

Since titanium forgings are made into parts, their stress, importance, and working conditions are different during use, and the materials and metallurgical processes used are also different. Therefore, different parts are divided into titanium forgings according to the above conditions and the requirements of this department. Different categories, different departments, and different standards classify titanium forgings differently. But in any case, the overall quality inspection of titanium forgings is inseparable from two types of inspections, namely the inspection of appearance quality and internal quality, but the types of titanium forgings are different, and their specific inspection items, inspection quantities and inspection requirements. Just different. For example, some industrial departments divide structural steel, stainless steel, heat-resistant steel and F9 Titanium Forging into Class IV for inspection, some departments classify aluminum alloy titanium forgings and die titanium forgings into Class III for inspection according to their usage, and some departments will Aluminum alloy, copper alloy and titanium forgings are divided into IV categories for inspection.

Specifically, the appearance quality inspection of titanium forgings is to check whether the shape and geometric dimensions of titanium forgings meet the requirements of the drawing, whether the surface of titanium forgings is defective, what kind of defects are, and what are their morphological characteristics. The inspection content of the surface condition is generally to check whether the surface of titanium forgings has surface cracks, folds, wrinkles, pressure pits, orange peel, blistering, scars, corrosion pits, bumps, foreign objects, underfill, pits, lack of meat, etc. Defects such as scratches. The internal quality inspection is to check the internal quality of the titanium forgings itself, which is a quality condition that cannot be found by the appearance quality inspection. It includes not only checking the internal defects of the titanium forging, but also checking the mechanical properties of the titanium forgings. Or large titanium forgings should also undergo chemical composition analysis. For internal defects, we will check whether the titanium forgings have internal cracks, shrinkage holes, porosity, coarse grains, white spots, dendrites, streamlines that do not conform to the shape, and streamlines through low-power inspection, fracture inspection, and high-power inspection methods. Defects such as disorder, flow through, coarse grain ring, oxide film, delamination, overheating, and overburning structure. For the mechanical properties, it is mainly to check the normal temperature tensile strength, plasticity, toughness, hardness, fatigue strength, high temperature instantaneous rupture strength, high temperature durable strength, durable plasticity and high temperature creep strength.

The existence of defects in titanium forgings, some will affect the processing quality or processing quality of subsequent processes, and some will seriously affect the performance and use of titanium forgings, and even greatly reduce the service life of the finished products and endanger safety. Therefore, in order to ensure or improve the quality of titanium forgings, in addition to strengthening quality control in the process and taking corresponding measures to eliminate the occurrence of defects in titanium forgings, necessary quality inspections should also be carried out to prevent subsequent processes (such as heat treatment, surface treatment, Cold working) and titanium forgings with defects that have adverse effects on performance are passed into the subsequent process. After the quality inspection, remedial measures can also be taken for the manufactured titanium forgings according to the nature of the defects and the degree of influence on the use, so that they meet the technical standards or the requirements of use.

Therefore, in a sense, the quality inspection of titanium forgings, on the one hand, is to check the quality of the produced titanium forgings, and on the other hand, it is to point out the direction of improvement for the forging process, so as to ensure that the quality of titanium forgings meets the requirements of technical standards for titanium forgings. And meet the requirements of design, processing and use. The quality inspection of titanium forgings includes the inspection of appearance quality and internal quality. The appearance quality inspection mainly refers to the inspection of the geometric size, shape, surface condition and other items of the titanium forgings; the internal quality inspection mainly refers to the inspection of the chemical composition, macrostructure, microstructure and mechanical properties of the titanium forgings.

Why is the hardness required for titanium screws?

There is a lot of knowledge in titanium alloys. Titanium alloys refer to alloys composed of other elements based on titanium. Among them, titanium alloys include titanium aluminum alloys, titanium copper alloys, titanium manganese alloys and other 70 kinds of metals containing titanium elements. . titanium metric screw manufacturers say that the density of titanium alloys is generally around 4.51g/cm3, which is only 60% of that of steel. Some high-strength titanium alloys exceed the strength of many alloy structural steels. Therefore, the specific strength (strength/density) of titanium alloys is much greater than that of other metal structural materials.

Parts with high unit strength, good rigidity and light weight can be produced. Titanium alloys are used in aircraft engine components, skeletons, skins, fasteners and landing gear. So when we customize titanium screws, how to choose the material of the screws, in fact, titanium alloys are produced to meet the different needs of the industry.

Since all the screws in the world are used in different environments, their positions on machine parts are also different, and the screw hardness, flexibility, heat conductivity and wear resistance required by the machine are also different. Therefore, when customizing the production of screw fasteners for customers, we will ask the user where the screws are used and what kind of performance do they need?

If hardness is required, it is recommended to use titanium-cobalt alloys, which are generally used to make cutting tools. When selecting the screw material, it must be understood that when the hardness of the screw is high, the titanium screw is easy to break.

Titanium screws are still the same as ordinary stainless steel screws. Titanium screws are actually no different from these everyday screws, but the material has changed. Titanium screws have an anti-corrosion effect and are fasteners used in a certain corrosive environment. Most of them are used in chemical, pharmaceutical, electronics, aviation and other fields.

Application of titanium standard parts and titanium bolts in daily life

Titanium standard parts are commonly used titanium screws, titanium bolts, titanium screws, etc., and are also widely used in daily necessities. titanium forging There are:

1. Used as shell materials: computers, cameras, game consoles, mobile phones, shavers, lighters, suitcases, etc.;

2. Used as lightweight materials: crutches, fishing rods, watches, hair clippers, antennas, musical instruments, kitchen utensils, spectacle frames, etc.;

3. Crafts and decorative materials: earrings, bracelets, rings, necklaces, brooches, etc.

Causes and Solutions of Cracks in Titanium Plates and Titanium-steel Composite Plates

Cracks are a frequent defect in the welding of titanium plates. Titanium weld cracks are cold cracks, mainly caused by hydrogen in the weld. The main sources of hydrogen are moisture and oil in the plate and welding wire, and the ambient humidity is the main reason for the increase of hydrogen in the weld.

Under the action of high temperature during welding, a large amount of hydrogen is dissolved in the molten pool. During the cooling and solidification process of the weld, hydrogen is easily escaped due to the rapid decrease in solubility. If the weld cooling rate is too fast, the hydrogen will not escape and remain in the weld, which will make the hydrogen in the weld supersaturated, so the hydrogen has to diffuse as much as possible, and promote further embrittlement of this area.

If there is a notch effect in this area and the hydrogen concentration is high enough, cracks may occur. Especially in winter construction, the ambient temperature is low, and the water vapor adheres to the AMS 4900 CP Titanium Sheet, which creates conditions for the hydrogenation of the weld. Because the titanium plate is too thin (1.2mm), the steel plate is relatively "warm", the temperature rises slowly, and the corresponding titanium composite layer weld is cooled too fast. During the cooling process, the residual hydrogen in the weld has no time to escape. It exists in the form of supersaturation in the weld, which eventually leads to the appearance of cracks.

Therefore, in the welding process of Grade 23 Ti-6Al-4V ELI Titanium Sheet, the surface of the base metal and welding wire should be carefully cleaned, and the ambient temperature should not be lower than 5 °C. During construction in winter, flame preheats the base steel surface, one is to remove the moisture around the weld; the other is to increase the temperature of the weldment and reduce the cooling rate of the weld.