The results of mechanical test show that is bending strength, toughness against impact and void ratios can be improved after the rich iron matris is added with rare earth.
Impeller for the three single-string bending garden leaves, use a semi-enclosed impeller, and the use of malleable iron, so high strength, corrosion resistance;
叶轮为三片单园弦弯叶，选用半封闭叶轮，并采用可锻铸铁、所以强度高，耐腐蚀；
3
A fully-welded steel structure frame was successfully developed and applied to a bending machine to replace conventional iron casting structure.