| 摘要 |
<p>The invention relates to a cold gas spraying method. In said method, particles are accelerated onto a substrate (18) using a cold gas stream (17) and remain adhered to said substrate. According to the invention, forming gas 95/5 with a nitrogen content of 95 mol.% and a hydrogen content of 5 mol.% is used as the carrier gas for the cold gas stream (17). Using said carrier gas, a high gas speed can be advantageously achieved in the cold gas stream (17), at any rate a higher speed than with air or nitrogen, the conventional gases for the carrier gas. The use of helium can also be advantageously omitted for reasons of cost. In addition, the mixture ratio of the forming gas advantageously allows the forming gas to be used without separate safety precautions which would be necessary if hydrogen were selected as the carrier gas without the addition of other gases. According to the invention, gas speeds of over 1400 m/s can be advantageously achieved in the cold gas stream (17) using the forming gas, thus exceeding the achievable speeds using air or nitrogen.</p> |
