What is abrasion resistant cast iron ?
cast iron, we can also call it wear resisting cast iron.
A certain amount of hardening phase distribute in the cast iron
matrix which makes it not easy to wear.
1. Types of Abrasion resistant cast iron
Abrasion resistant cast iron can be divided into antifriction cast
iron and anti-wear categories.
The former is working with lubricant, and adhesive wearing. Such as
machine tool guide and carriage, large
gearbox of tractors and so
The latter is working in the absence of lubricant, and abrasive
wearing, such as nut, sleeve and so on.
2. Antifriction cast iron
There should be hard phase distributing in the soft tissue matrix,
so after wearing ,soft substrate can form trench to make the film
conducive to lubricate, withstand hard phase.
Thin sheet of gray paralytic cast iron can basically meet this
requirement. Ferrite matrix is the soft matrix, cementite is the
hard phase, and graphite can be as the role of storing oil and
lubricating. In order to further improve the wear resistance of
pearlitic gray cast iron, we can add the right amount of Cu, Cr, Mo,
P, V, Ti and other alloy elements into the cast iron.
Commonly used alloy antifriction cast iron is high phosphorus cast
iron, it contains 0.4% to 0.7% of phosphorus. In the main post, P
can form Fe3P eutectic hard skeleton. So it can improve the wear
resistance of cast iron effectively. Another is phosphor bronze
titanium antifriction cast iron.
3. Anti-wear cast iron
Anti-wear cast iron should have a uniform high hardness. Common
White cast iron is a kind of wear iron. Because of its brittleness,
we often add an appropriate amount of Cu, Cr, Mo, W, Ni, Mn and
other alloy elements to increase its toughness and higher
hardness and wear
3. Development of Abrasion resistant cast iron
Recent years, many iron foundries
in China have successfully developed a kind of good toughness and
strength cast iron. According to the experience of Dandong
Foundry in China, by adding 5% to 9.5% manganese into the cast
iron, the amount of the silicon is controlled between 3.3% and 5.0%.
By some treatment such as controlling the cooling rate, we can
obtain large amounts of residual austenite carbide, martensite and
spherical graphite organization, with high wear resistance.
With the improvement of the industry, the abrasion resistant cast
iron with higher wearing resistance can be developed and used