合理控制加料方式对硫系易切削钢粉性能的影响

Effect of reasonable feeding control on properties of free cutting steel powder containing sulfur

在工艺固化的情况下,硫系易切削钢粉常出现氧含量偏高、压缩性偏低的现象。通过调整料厚和改变加料方式的途径来改善这种情况,结果表明:工艺固化时,料厚小于25 mm可有效降低全氧含量,提高压缩性;改变加料方式可提高生粉颗粒间的松散性,相同工艺条件下,料厚30 mm即可同时满足硫系易切削钢粉各项性能要求,并有进一步提升的空间。

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.