显示标签为“titanium metal”的博文。显示所有博文
显示标签为“titanium metal”的博文。显示所有博文

2015年2月12日星期四

In the process of cutting titanium, the precautions are

In the process of cutting titanium, the precautions are:
(1) Due to the small elastic modulus of Custom Titanium Parts alloy, the deformation of the workpiece clamped in the processing of large deformation and stress, will reduce the machining accuracy of the workpiece; workpiece clamping force installation should not be too large, increase aid support when necessary.
(2) If using liquid hydrogen cutting, the cutting process will decompose at high temperatures to release hydrogen embrittlement caused by absorption of titanium; it may cause high temperature titanium stress corrosion cracking.
(3) the use of cutting fluid chlorides are also likely to break down or volatile toxic gases, the use of security measures should be taken, otherwise it should not be used; after cutting should be timely and chlorine-free cleaning agent thoroughly cleaned parts, remove residual chlorine thereof.
(4) prohibits the use of lead or zinc-based alloy production workers, fixture and titanium contact, copper, tin, cadmium and its alloys are also prohibited.
All workers, fixtures or other devices must be in contact with the titanium clean; titanium parts cleaned off, to prevent contamination of grease or fingerprints, or after the salt may cause stress corrosion.
Under normal circumstances when machining titanium alloys, no ignition hazard only when micro-cutting, small chips have cut ignition combustion phenomenon. To avoid fires, in addition to a large number of pouring coolant should prevent chips piled on the machine tool to be replaced immediately with a blunt or reduce cutting speed, feed rate increased to increase the chip thickness. If once the fire should be used talc, limestone titanium metal, dry sand, fire fighting equipment were extinguished, prohibited the use of carbon tetrachloride, carbon dioxide fire extinguisher, nor watering, because water can accelerate the burning, and even lead to a hydrogen explosion.


2015年1月13日星期二

itanium is an important structural metal in the 1950s developed

Titanium is an important structural metal in the 1950s developed, titanium because of its high strength, corrosion resistance, and high heat resistance and are widely used in various fields. Many countries recognize the importance of titanium metal materials, have their research and development, and has been applied.
Titanium is the first practical American successfully developed in 1954, because of its heat resistance, strength, ductility, toughness, formability, weldability, corrosion resistance and biocompatibility are good, and become titanium ace alloy alloy industry, which accounts for the use of an alloy of 75% to 85% of all titanium alloys. Many others can be seen as a modification of titanium alloy Ti-6Al-4V alloy.
1950s and 1960s, mainly in the developing high temperature titanium and titanium alloy airframe aviation engine, the 1970s developed a number of corrosion resistant alloys, since the 1980s, corrosion resistant and high-strength titanium alloy has been further development of. Temperature resistant titanium alloys 400 ℃ from the 1950s up to the 1990s 600 ~ 650 ℃.
Appears based alloy, the titanium being propelled by the cold end to the hot end of the engine in the direction of the engine using the engine parts. Titanium alloy development to high-strength, high plastic, high strength and high toughness, high modulus and high damage tolerance direction.
In addition, since the 1970s, there was memory alloys, and get increasingly widely used in engineering.