Safety problems in titanium alloy processing!

Release time：2022-07-27 15:17:16 丨 Number of visits：

Titanium alloy has the characteristics of high temperature resistance, good performance, superior corrosion resistance, light weight, and compatibility with other metals, so it is widely used in the production of various advanced aircraft structural parts and non-structural parts. However, the thermal conductivity of titanium alloy is poor, and the phenomenon of sticking knife is easy to occur when cutting, which brings some trouble to the processing of titanium alloy rod manufacturers. The possible ignition and combustion problems in the process of titanium alloy processing and their preventive measures are discussed.

Titanium metal belongs to non-spontaneous combustion metal, whether it is plate, block are not easy to spontaneous combustion, even if it is presented as a powder, it is not spontaneous combustion. However, titanium is a flammable metal, and the spark and heat generated in the process of machining may also induce the combustion of titanium plates and blocks. Once the fire starts, it's fierce, and the damage from the fire is similar to magnesium. Especially titanium powder ignition point is very low, can it lit a match, when faced with some fire source (such as sparks in the process of machining and edm, etc.) can be directly combined with oxygen and combustion, slower reaction at first, and then from point and line to plane spread rapidly, at the same time in the burning flame of temperature can be shengda above 1000 ℃, When the powder flies, it will explode when it meets the ignition source. Therefore, the combustion of titanium alloy in the process of processing and how to control it are very concerned by aircraft manufacturers and maintenance workers.

Safety measures in titanium alloy processing:

(1) Use sharp slicing, grasp the slicing rate, cutting time, and use appropriate lubricating oil cooling (mineral oil is the safest cutting coolant, do not use water-soluble Jl raw solution) to ensure that sufficient heat will not be generated during the process that can cause fire and combustion.

(2) The processing area and the surrounding area shall be kept dry and low temperature; To be equipped with fire protection facilities, leave enough, unobstructed fire space and access.

(3) Do not place flammable materials around the processing area, and remove or isolate combustible materials nearby.

(4) It is not allowed to set up oxygen system or equipment near the operation site.

(5) Wet polishing operation and selection of appropriate coolant, dry polishing when the use of dust removal equipment to remove titanium fine dust.

(6) Clean the operating machinery frequently and dispose of the debris after cutting as soon as possible to avoid the harm caused by the attachment of titanium chips or powder.