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澳大利亚进口的旱地免耕播种机开沟器的材质是一种成分与３０ＣｒＭｎＳｉＮｉ２ＭｏＡ相近的中碳低合金钢，显微组织是针状贝氏体＋少量马氏体。６５Ｍｎ钢经激光表面相变处理后具有良好的耐磨粒磨损性能，是开沟器国产化的一个重要途径
Australia imports of dry land opener opener opener material is a composition similar to 30CrMnSiNi2MoA carbon low-alloy steel, microstructure is acicular bainite + a small amount of martensite. 65Mn steel by the laser surface phase change treatment has good abrasive wear resistance, is an important way of domestic opener