Method for treating organs subject to erosion by liquids and anti-erosion coating alloy
The present invention relates to a method for treating organs subject to erosion by liquids, in particular vapour turbine components, which contemplates laser plating with a cobalt-based alloy comprising chromium from 28 to 32% by weight; tungsten from 5 to 7% by weight; silicon from 0.1 to 2% by weight; carbon from 1.2 to 1.7% by weight; nickel from 0.5 to 3% by weight; iron from 0.01 to 1% by weight; manganese from 0.01 to 1% by weight; molybdenum from 0.2 to 1% by weight; possible impurities or other elements from 0 to 0.5% by weight and cobalt the complement to 100%.
1. A cobalt-based alloy for the coating of organs subject to erosion by liquids, comprising:
chromium
30%
by weight;
tungsten
6%
by weight;
silicon
1%
by weight;
carbon
1.5%
by weight;
nickel
1.8%
by weight;
iron
0.5%
by weight;
manganese
0.3%
by weight;
molybdenum
0.3%
by weight;
cobalt
Balance;
other
0.05%
by weight.
2. An organ or end-product subject to erosion by liquids, comprising a surface coating layer to prevent erosion from liquids based on an alloy according to claim 1 .
3. The organ or end-product according to claim 2 , wherein it is a component of a vapour turbine.
4. The organ or end-product according to claim 3 , wherein said component is a blade of a vapour turbine.
5. The organ or end-product according to claim 2 , wherein said surface coating has a thickness ranging from 0.1 to 5 mm.