Abstract：The phenomena of high total oxygen content and low compressibility often appear in the free cutting steel powder containing sulfur. It can be improved by adjusting the material thickness and changing the feeding way. Results show that the total oxygen content is reduced and the compressibility is increased effectively when the powder thickness is less than 25 mm with the original process. The looseness of the powder is improved by changing the feeding method. The 30 mm material thickness can meet the performance standard under the same process condition， and there is room for further improvement.
2017, Vol. 27 
