The modifiedtreatment by RE can refine the crystalline gain and thus, increasing the mechanical property and wear resistance significantly.
采用稀土变质处理，可使晶粒细化，从而有效地提高机械性能和抗磨性能。
2
Therefore, selecting the water temperature properly the hot water processing of big cross section machine parts of 45 steel can replace modifiedtreatment.
这样，适当选择水温，45钢制较大截面工件的热水处理可代调质处理。
3
The experiments prove that after being modifiedtreatment, the addition of cold-hardening resin is cut down, so that the cost of cold-hardening resin sand can be decreased.