请高手帮忙翻译一下~~~~机械英语啊

来源：百度知道 编辑：UC知道 时间：2024/08/21 15:55:08
Limitation on both preheat and heat input are necessary to esure that the HAZ cools at an appropriate rate and the correct hardness and microstructure are achieved .Too slow a cooling rate can result in a soft HAZ and thus a loss of tensile and fracture toughness properties.Too rapid a cooling rate produces a hard HAZ which may cause loss of ductility.Cooling is controlled by a balance between preheat and heat input for a particular plate thickness and joint configuration.

限制对预热和热输入是必要的esure的焊接冷却在适当的速度和正确的硬度和微观结构得以实现。过于缓慢冷却速度可能会导致软焊接，从而丧失拉伸强度和断裂韧性属性。太快冷却速度产生一种难以热影响区，这可能造成损失的ductility.Cooling控制之间的平衡预热和热输入某一特定钢板厚度和联合配置。