The fracture is brittle fracture, and the reason is that material of forming dies takes place the temperbrittleness.
引起脆性断裂的原因是成型模产生了回火脆性。
2
The residual deleterious elements in steel lead to products occurring red brittleness surface crack and temperbrittleness, and lead to hot strength of heat resistant steel decreasing.
钢中的残余有害元素致使钢材产生红脆性表面裂纹和具有回火脆性倾向，并使耐热钢的热强性降低。
3
The residual deleterious elements in steel lead to the products occurring red surface brittleness crack and temperbrittleness, and lead to the hot strength of heat resistant steel decreasing.