2015年6月29日星期一

Titanium operating temperature up to 500 ℃

Medical titanium plate temperature of several hundred degrees higher than aluminum, at moderate temperatures can still maintain the desired strength, long-term work of these two types of titanium alloy in the range of 150 ℃ ~ 500 ℃ still very high strength at a temperature of 450 ~ 500 ℃, and aluminum alloys decreased significantly at 150 ℃ than strength. Surgical implant titanium Titanium operating temperature up to 500 ℃, aluminum is below 200 ℃.

Medical titanium alloy  working in a humid atmosphere and seawater, the corrosion resistance is far superior to stainless steel; for pitting, etching, stress corrosion resistance is particularly strong; to have excellent corrosion resistance bases, chloride, chlorine organic materials, nitric acid, sulfuric acid and the like. However, the corrosion resistance of titanium with a reduction of oxygen and chromium salts medium is poor.
Titanium alloys at low and ultra-low temperature, retain their mechanical properties. Low temperature performance, low interstitial elements of titanium, such as TA7, at -253 ℃ can maintain a certain degree of plasticity. Thus, titanium is also an important low temperature structural materials.

2015年6月18日星期四

Medical fixation titanium Frequently Asked Questions

Medical titanium plate appearance during disposal and product processing, will encounter some of the following common problems:
1. Weld Disadvantages: relatively severe shortcomings weld, the selection of craft disposal methods to compensate for mechanical polishing, grinding marks occur, the formation of the appearance of uneven effect beautiful.
2, appearance is not common: only weld pickling and passivation, but also the appearance of uneven form, affect beautiful.
3, hard to get rid of scratches: all pickling passivation, nor can happen machining process in a variety of scratches removed, and can not be removed because of scratches, weld splatter and adhering to medical titanium outer carbon fixation steel, splash and other impurities, resulting in chemical corrosion and rust or electrochemical corrosion under the conditions of the existence of corrosive media.
4,surgical implant titanium  polished passivation uneven: polished craft pickling passivation disposal polishing of the area larger parts, it is difficult to reach even the role of co-disposal, not too ambitious even appearance. And work costs, materials costs are also higher.
5, pickling limited to: pickling and passivation paste is not omnipotent, plasma cutting, flame cutting and productivity and black oxide, is more difficult to get rid of.

6, scratched more severe form of the elements: the lifting, transporting and processing the layout process, scratches bump, persistent, hammering and other man-made elements of the more severe form, so look disposal difficult and also a corrosion occurred after treatment The primary reason.
7, the device elements: the profiles, sheet roll bending, bending process, the formation of scratches and creases also the main reason for the occurrence of corrosion after treatment.
8,titanium alloy plate  Other elements: Medical fixation titanium raw material acquisition, storage process, because lifting, bump and scratch transport processes occur relatively severe, also One reason for the occurrence of corrosion.

2015年6月15日星期一

Titanium medical board is widely distributed in the body

Surgical implant titanium is widely distributed in the body, normal human in an amount per 70kg body weight does not exceed 15mg, its role is still unclear. But titanium can stimulate phagocytic cells, the immune system has been shown to enhance the effect. It is widely used in medicine and sports fields. Titanium alloy plate can stimulate the phagocytes, and titanium has the ability to regulate the body's natural currents through cell ionization, the human body will produce beneficial physiological function and its chemical stability, will not Changes occur over time or deterioration, beneficial to human health. Therefore, the use of titanium products can achieve mental relaxation, muscle relaxation, improve the effect, and stimulate blood flow, increased blood flow helps your body to better substrate and remove blood from the pain and fatigue factor produced efficiently control the current disorder in the body. Bursitis, sciatica, headache these types of arthritis and premenstrual syndrome has a significant role to ease short-term pain, by regulating the body current to ease muscle pain and stiffness, improve blood circulation.
Medical titanium plate because of its high strength, metal flexibility, scalability is poor, so the high technical requirements for processing with ordinary equipment is difficult to cast molding, using ordinary tools and very difficult to weld it up, and you can not change its shape using conventional equipment, it is very easy processing of complex fracture, it is difficult to form a production scale. Thus, in the domestic jewelry market is difficult to see a real sign of titanium jewelry.

2015年5月11日星期一

OLED display - OLED display

Organic electroluminescent diodes (Organic Light-Emitting Diode, OLED) Owing to the self-luminous , no backlight, high contrast , thin, wide viewing angle , fast response , flexibility of the panel can be used for a wide temperature range, relatively simple structure and process of the other excellent features, is considered medical titanium alloy generation of flat panel display technology emerging applications . For organic electroluminescent devices , luminescent material we may be divided into two types: small molecular baoji titanium industry  and a polymer OLED ( may also be referred to as PLED). Preparation of their differences mainly in the different devices : small molecule devices mainly used vacuum thermal evaporation process , the polymer devices are using spin coating or inkjet technology .

2015年5月7日星期四

Titanium rods related processing requirements

Processing requirements related to the chemical composition of titanium alloy rods and tubes
Titanium rods related processing requirements:
1 , the chemical composition of titanium and grade 2 titanium bars shall conform to the provisions of the reinspection when the demand side , allowing the chemical composition of the deviation should bespecified.
2 , thermal processing bar diameter or side length and tolerances shall comply with the provisions of one of the tables .
3, after thermal processing by car ( mill) light bars and cold-rolled, cold drawn rod diameter tolerances shall comply with the provisions of Table II .
4 , by car after thermal processing (grinding ) roundness light bars should not the half of its size tolerance .


5, do not cut length processing state bar of 300-6000mm, annealed state bar does not cut length of 300-2000mm, length or double length should not length the length of the range. Cut length tolerance of +20 mm; medical titanium alloy rod length scale bar should be included in the amount of cuts , the amount of each incision is 5mm, length or double length should be specified in the contract.

2015年5月3日星期日

Dynamic development of new alloy materials

Application of titanium and titanium alloys in the construction, automotive, marine engineering , medical and sporting goods and other aspects began to increase in recent years,
due in particular to promote the titanium alloy bar civilian application of desalination has attracted wide attention , medical titanium 1C 20Ti a 6A17Nb products in clinical
applications. Since the development of aerospace technology , research and development relative to grade 2 titanium sponge has been very active in terms of titanium . From basic
research to the study of alloys , to applied research have made great progress , titanium strength and bulk modulus of interstitials affect basic research . Composite data
interface behavior finite element simulation study , the alloy ordered strengthen research, alloy interaction of atoms and vacancies , etc. have made progress . In order to meet

2015年4月29日星期三

Medical titanium

Medical titanium alloy titanium implants in the human body for medical devices, artificial organs and prostheses or adjuvant therapy equipment. There titanium 6 aluminum 4 vanadium, titanium, aluminum 5 2.5 Sn, ELI titanium 6 aluminum 4 vanadium alloy. They have high specific strength and mechanical properties close to human bone strength is far superior to titanium, also resistant to fatigue, excellent corrosion resistance and biocompatibility characteristics.
A density of 4.506-4.516 g of buy titanium sheet / cm (20 ℃), but lower than the higher iron aluminum, copper, nickel. However, the intensity ratio of the first metal is located, is three times the stainless steel is aluminum [colored leads: ADC12 aluminum alloy ingot] of 1.3 times. Melting point of 1668 ± 4 ℃, latent heat of fusion 3.7-5.0 kcal / gram atom, boiling point 3260 ± 20 ℃, latent heat of vaporization 102.5-112.5 kcal / gram atom, the critical temperature 4350 ℃, the critical pressure of 1130 atmospheres. Thermal conductivity of titanium and poor, similar or slightly lower than stainless steel, titanium superconducting, the superconducting critical temperature of pure titanium 0.38-0.4K. At 25 ℃, titanium heat capacity of 0.126 cal / g · atom degrees enthalpy 1149 cal / g atom, the entropy of 7.33 cal / g · atom degrees, titanium bar supplier is paramagnetic, permeability of 1.00004. Titanium has plasticity, high elongation up to 50-60% titanium, reduction rate of 70-80%, but lower intensity, not as a structural material. The presence of impurities in titanium, a great influence on the mechanical properties, in particular interstitial impurities (oxygen, nitrogen, carbon) can greatly increase the strength of titanium, significantly reducing its ductility. Titanium as a structural material having excellent mechanical properties, which is strictly controlled and adding an appropriate amount of impurities and alloying elements to achieve.