METHOD OF PLASMA DEPOSITION Russian patent published in 2011 - IPC B23K9/04 C23C4/12 B23K10/02 B05B5/16 H05H1/42 

FIELD: process engineering.

SUBSTANCE: invention relates to arc welding, particularly, to deposition by powder admixtures using direct plasma arc effect. Powder admixture is fed into plasma arc by gravity via metering opening of the bin discharge chamber with shut-off device and sent into arc column in continuous flow by powder admixture gravity forces. Plasma generator is arranged at an angle to flow, while bin discharge chamber is communicated with atmosphere. Powder admixture laminar narrow-cylinder flow is created to be directed into arc column axial zone to move on column surface. Admixture flow cross section is set smaller than arc column axial zone cross section in area of column maximum reduction. Bin discharge chamber metering opening length is set smaller than its flow section. Opening surface are machined to Ra not exceeding 0.2 mcm in rounding edges of inlet and outlet sections.

EFFECT: higher deposition quality and rate.

3 cl, 3 dwg