Finally , the slight crackle fissures along the direction of undissolved carbide and crystal boundary, and.

裂纹沿未溶碳化物和晶界走向开裂,说明未溶碳化物降低了晶界处结合强度.

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The octahedron steel ingot and V - anvil forging bar can effectively prevent cracks in crystal boundary.

因此采用八棱形钢锭锻造齿轮轴,并采取上下V形砧拔长圆坯的方式可以有效地防止轴心晶间裂纹的出现.

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