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钙易切削钢是六十年代开始研制的新钢种,它给结构钢的易切削化带来了新的希望,即可以在易切削化时不必牺牲或很少牺牲材料的机械性能。但有两个问题是人们十分关注的,即冶炼工艺的困难和由于避免用铝脱氧所带来的晶粒粗化。为此我们研究了用钛脱氧和加入微量稀土元素的易切削钢,希望在既能达到易切削化效果的同时,还能简化冶炼工艺并细化奥氏体晶粒,稀土元素有强的脱氧作用,并能有效
Calcium free cutting steel was developed in the 1960s as a new type of steel, which brings new hope for the easy cutting of structural steel, that it can be easily cut without sacrificing or rarely sacrificing the mechanical properties of the material. However, two issues are of great concern, namely the difficulty of the smelting process and the coarsening of the grains due to the avoidance of deoxidation with aluminum. To this end, we have studied the use of titanium deoxidation and the addition of trace rare earth elements free cutting steel, hoping not only to achieve easy cutting effect, but also simplify the smelting process and refine the austenite grains, rare earth elements have strong deoxy Role, and can be effective