There are a wide range of metal cutting gases available and their composition differs based on how they are used. They can be in liquid, semi-liquid or gaseous form. In addition to this, some have different effects on different metals. It is important to know the properties of the different types of gas before you select one for your project.
Acetone is a good choice for high-speed metal cutting due to its excellent melting and cooling properties. It is usually available as a powder with a high boiling point and excellent resistance to oxidation. The main benefit of using acetone is that it produces very little smoke and emissions. The low cost effective properties of acetone make it highly compatible with a wide range of machinery. However, acetone is expensive and its efficiency can be affected by external factors such as poor air circulation and low pressure.
The other metal commonly used for cutting is aluminium. It is known for its excellent ability to hold an edge against hard and soft metal materials as well as cutting a smooth and consistent band in the desired direction. Despite being low cost, the disadvantage of using aluminium is that it corrodes quickly when exposed to moisture. This corrosion can happen even on a low pressure cutter with a wet ballast. In order to prevent this corrosion, aluminium is mixed with phosphorous to prevent the growth of rust on the blades. Mixtures of calcium and magnesium have also proven to be helpful in preventing corrosion.
Magnesium oxide is also another popular metal cutting gas. It has low boiling points and excellent electrical and mechanical properties. It is mixed with acetylene to form a thin liquid which can be used with an oxidizer such as dichroic acid. Another combination with acetylene is made with dichroic salts with a low level of oxygen and high vapor compression.
In spite of being quite low in boiling point, pure magnesium is still used for cutting in industry. A small percentage is mixed with acetylene to form a thick liquid. One thing to note though, is that magnesium oxide is insoluble in water. That is why it is mixed with other solvents such as ethyl or propylene glycol to make acrylic solutions. According to Vassilios says, the best way to use magnesium for cutting is still with the oxide form.
Another popular low cost metal cutting agent is the boron nitride. It is said that Boron is good at ensuring that cutters have consistent results regardless of the angle they are used on. Unfortunately, despite its popularity, boron nitride is also very brittle and can break into pieces after prolonged use. That is why manufacturers only add small amounts of boron to their products. To prevent breaking into pieces, some companies coat the boron nitride with an oxide coating.
Last but not least, we have the cadmium gas. Despite its low melting point, this agent can withstand extreme operating pressure. Unlike other metals, this gas does not become brittle under pressure. According to Vassiliou, Bharat metal cutting gasses are the perfect choice for those who work on industrial scales. The high operating pressure produced by cadmium is ideal for use in industries where objects need to be cut down to specific shapes.
Although Vassiliou says that all three of these agents are worthy of consideration for use in metal cutting operations, he recommends using acetylene as the lowest achievable concentration. He says that the agent is safe to use, provides consistent results, and has the least possible negative effects. Acetylene is the cheapest of the three agents, but it also provides the best performance. According to Vassiliou, if a company uses pure acetylene in its operations, then it should be able to sell products at a high price. As a result, Vassiliou says that the company should invest in its acetylene plant.