一、前言羽毛状晶是变形铝合金铸锭的一种铸造组织,它虽然没破坏金属组织的连续性,但因共在轧制和锻造变形时,往往沿羽毛晶的双晶面产生裂纹,铸造时必须尽量防止该组织的出现。在大生产中自由锻造 LC10合金 Y2—1模锻件的毛坯时,发现3—1955熔次 I. Introduction Feather shaped crystal is a cast aluminum alloy ingot casting structure, although it does not undermine the continuity of the metal structure, but due to a total of rolling and forging deformation, often along the feather crystal twin crystal surface cracks, Casting must try to prevent the emergence of the organization. In the large production of free forging LC10 alloy Y2-1 forging blank, found that 3-1955 fusion