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一、回火脆性在工程应用中的现实意义钢的回火脆性与下列各问题有关,因此在工程中具有较大的现实意义。1.回火脆性的温度范围刚好是大多数合金结构钢的回火温度范围。为了使重要的结构零件有良好的强韧性,所以传统的热处理工艺是调质处理。由于某些合金钢在高温回火后缓慢冷却时会出现回火脆性,因此必需引起重视。例如1966年美国就发生了一起175毫米炮管(内径7时、外径14.7时)发射爆炸事故,分析碎片表明,主要系沿晶断裂(图1),推测这次事故是由于炮钢的回火脆性所引起。
First, the practical significance of temper embrittlement in engineering applications Temper brittleness of steel with the following issues related to the project has a greater practical significance. 1. Temper brittleness temperature range is just the tempering temperature range of most alloy structural steel. In order to make the important structural parts have good toughness, so the traditional heat treatment process is quenched and tempered. Due to the temper brittleness of some alloy steels when they are slowly cooled after tempering at elevated temperatures, it is important to pay attention. For example, in the United States in 1966, a 175-mm artillery tube (diameter 7 at 7 o’clock and outer diameter 14.7) was used to launch an explosion. The analysis of debris showed that the main cause was intergranular fracture (Figure 1) Fire brittle caused.