The brittleness of high chromium white cast iron can shorten to its working life,so diminishing its brittleness and improving its impact toughness have the important realistic meaning.

• 为了解决高铬白口铸铁的脆性会严重降低其使用寿命问题,因此降低高铬白口铸铁的冲击脆性提高其韧性具有重要的现实意义。