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Titanium Bars grinding
Titanium rods have been widely used in aerospace industry both at home and abroad for their excellent heat and corrosion resistance and particularly high strength. Aiming at the problem of grinding burn in the process of grinding, Titanium Bars the paper chooses the leading test method to analyze and discuss the changing rules of grinding force, grinding temperature, workpiece surface roughness and surface tracing, surface layer gold phase arrangement and microhardness etc.
The surface tracing is deteriorating with the increase of the grinding temperature, and when severe burns occur, the surface of the workpiece is cracked, Titanium Bars and its direction is roughly straight with the direction of grinding. The metallographic arrangement of the material surface changes when the workpiece burns, Titanium Bars and the α-phase particles are significantly thicker, Titanium Bars which makes the physical and mechanical properties of the titanium rods decrease. The research results provide the theory and test basis for the optimization of high efficiency and high-precision titanium rod grinding process supply.
In the process of titanium rod grinding, there are more serious grinding wheel adhesion, grinding force and grinding temperature are very high, so the grinding burns and cracks are briefly occurred. Grinding burns and cracks can also occur on grinding surfaces, even when the grinding depth is small, with the usual abrasive grinding of titanium rods. The general performance is the yellow-brown spot, the hair pattern crack, its direction and the grinding direction is straight, uses the large grinding quantity to have the surface also to have the fish scaly folds and the plastic deformation metal deposit.
From the micro-general, abrasive and adhesion of the process is the cutting edge of the first small area adhesion gradually large area of adhesion, grinding particle micro-crushing, and then grinding debris fall, titanium rod grinding zone plastic deformation. The abrasive and the workpiece are bonded to each other, which has both physical adsorption effect and chemical adsorption effect, in addition to the shearing force of the relative slip, the material is transferred to the abrasive grains, which is the whole process of the grinding wheel adhesion. The grinding wheel adhesion is very simple, which makes the grinding zone temperature rise, Titanium Bars and the grinding surface is distributed along the workpiece layer, which is accompanied with the transformation layer and residual stress.
During the grinding and cooling process, the density of oxide film on the grinding surface reaches the exceeding critical temperature when the grinding depth is large, and the grinding arc area will rise sharply due to the film pleasure of the grinding fluid, and the cooling effect becomes worse. Titanium Bars When the elevated temperature exceeds the limit of the usual abrasive, Titanium Bars the abrasive grains fall due to softening and damage. So it is necessary to choose the new superhard grinding wheel to increase the tolerance of the high temperature in the grinding arc zone.
National standard number: TA1, TA2, TA3, TA7, TA9, TA10, TC4, TC4ELI, TC9, TC10, TC11
Beauty label: GR1, GR2, GR3, GR5, GR7, GR12.
I a basic knowledge of titanium and titanium alloy gold. The application of titanium we are now in the work of each and every one have a preliminary understanding on titanium, all know that the proportion of titanium is a kind of light, corrosion resistance, good heat resistance and many other excellent properties, known as the "metal" future "metal" the 21st century is a new kind of structural material with prospects.It has a kind of metal color of aluminum, and we have also solved some of the related knowledge of titanium.Let's start with the sponge titanium, titanium ore reserves in China is the world's proven reserves of about 64%, look from industrial ore types, the features of titanium resources in China is mainly primary vanadium titanium magnetite ore, followed by exogenous ilmenite sand mining, the third is the red rock mine, the fourth is rutile ore, titanium concentrate production capacity in China as long as the distribution of panzhihua in sichuan, hainan, guangxi, panzhihua is China's largest titanium concentrate supply base, accounting for over 90% of the Chinese market.Titanium is mainly used to produce titanium white, titanium titanium (titanium sponge), titanium steel and titanium electrode and coating.Spongy titanium is mainly used for reduction of magnesium and sodium reduction (distillation). Other methods are not industrialized.At the end of 2008, China's sponge titanium production reached 60,000 tons, ranking first in the world.Titanium processing materials about 270,000 tons, baoti 2008 titanium processing materials 11,000 tons.Titanium ingot production is about 50,000 tons.Titanium is only about a fifth.In China, titanium is the first major company, accounting for about 44% of the country's titanium, about 17% of the aerospace industry, and 16% in sports and recreation area.(according to 2007 statistics).In the United States, titanium is mainly used in aerospace, accounting for about 60%. In Japan, titanium is mainly used in chemical industry.In China, it is mainly used in chemical industry. It has leisure and other fields, accounting for about 70%.The main products of foreign titanium products are American titanium, Timet,RTI international metal company, Allegheny, Japan's kobe iron, sumitomo titanium and Nippon steel.Russia's vsmpo-avisma.
.So what are the use of titanium rods?Let me introduce you.
The industrial production of titanium began in 1948.Demand from the aviation industry has enabled the titanium industry to grow at a rate of about 8 per cent a year.At present, the production of international titanium alloy processing materials has reached 40,000 tons and nearly 30 kinds of titanium alloys.The most widely used titanium alloys are Ti-6Al-4V(TC4), ti-5al-2.5 Sn(TA7) and industrial pure titanium (TA1, TA2 and TA3).Titanium alloys are used primarily to make aircraft engine compressor parts, followed by rocket, missile and high-speed aircraft layout.60 s, titanium and its alloys have been usually used in industry, used for making electrode electrolysis industry, power plant condenser, oil essence and seawater desalination heater and environmental pollution control equipment, etc.Titanium and its alloys have become an anticorrosive layout.
It is also used in the production of hydrogen storage materials and shape recall alloys.Titanium alloy is used in the aerospace industry is a new important layout data, specific gravity, strength and using the temperature between aluminum and steel, but is larger than that of high strength and excellent corrosion resistance to seawater and ultra-low temperature functions.Dosage of titanium alloy in the aircraft engine is usually accounted for 20% ~ 30% of the total weight layout, first used in compressor parts, such as casting titanium fan, compressor disk and blade, titanium compressor casing, intermediate casing, bearing housing, etc.The spacecraft first USES titanium alloy's high ratio strength, corrosion resistance and low temperature resistance to make various pressure vessels, fuel storage tanks, fasteners, instrument bandages, frames and rocket housing.Artificial earth satellites, lunar modules, manned spacecraft and space shuttles also use titanium alloy sheet welding pieces.
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