论文部分内容阅读
本文对各种加热温度及冷却速度下的由第一汽车厂和大连钢厂联合开发,研制的35VS非调质易切钢的组织和性能进行了研究,结果完明,珠光体体积百分数和冷却速度有关,但奥氏体晶粒尺寸随着加热温度升高而增加,并在1050℃时发生突然长大,珠光体片层间距随冷却速度的增加而减少,铁素体的显微硬度明显高于35钢中铁素体的硬度。室温强度指标σb6和σ0:2随加热温度的升高而增加,室温塑性指标和δ随加热温度升高而降低,在性能和冷却速度关系曲线中,当冷却速度为60℃/min时,35VS钢具有较好的塑性,这种冷却速度下得到的组织呈魏氏组织。
In this paper, we studied the microstructure and properties of 35VS non-quenched and tempered free-cutting steel jointly developed and manufactured by No.1 Automobile Factory and Dalian Steel Mill at various heating temperature and cooling rate. The results showed that the volume fraction of pearlite and cooling However, the austenite grain size increases with the increase of heating temperature and suddenly increases at 1050 ℃. The spacing of pearlite layer decreases with the increase of cooling rate, and the microhardness of ferrite is obviously Higher than 35 steel ferrite hardness. The room temperature strength index σb6 and σ0: 2 increase with the increase of heating temperature. The room temperature plasticity index and δ decrease with the increase of heating temperature. When the cooling rate is 60 ℃ / min in the relationship between performance and cooling rate, 35VS Steel has good ductility, the cooling rate obtained by the organization was Wei’s organization.