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一、前言应变时效使金属材料的强度硬度升高冲击韧性下降,其中包括加工硬化和时效硬化作用。不同的拉伸应变量,不仅使试样的冷加工硬化程度不同,而且由于位错密度的增加还可能影响时效硬化的程度,因此应变量的变化是影响时效敏感性试验结果的重要因素。我们选择903钢板,进行拉伸应变量对时效冲击值α_(kus)的影响因素试验,目的在于找出拉伸应变量ε对α_(kus)的影响水平,以及ε
First, the preface Strain aging so that the strength of the metal hardness increases impact toughness decreased, including work hardening and age hardening. The different tensile strains not only make the samples have different degrees of cold work hardening but also affect the degree of age hardening due to the increase of the dislocation density. Therefore, the variation of the strain amounts is an important factor that affects the results of the aging sensitivity test. We chose 903 steel plate, the tensile strain on the impact value of α_ (kus) impact factor test, the purpose is to find out the amount of tensile strain ε α kus impact level, and ε