论文部分内容阅读
研究了淬火和回火温度对含硼低合金高速钢显微组织和性能的影响。结果表明,含硼低合金高速钢组织主要由马氏体和碳硼化合物构成,铸态下碳硼化合物主要以连续网状分布,而淬火后,碳硼化合物出现了断开的倾向,随着淬火温度提高,碳硼化合物的断开倾向越明显,而且部分碳硼化合物溶入基体,促进了基体的强化。回火温度的变化,对碳硼化合物的影响不明显,但随着回火温度的升高,马氏体中会析出二次碳硼化合物,使基体中合金固溶度下降。随着淬火温度上升,含硼低合金高速钢轧辊材料硬度提高。随着回火温度上升,硬度开始下降。
The effects of quenching and tempering temperature on the microstructure and properties of boron-containing low alloy high speed steel were studied. The results show that the microstructure of boron-containing low-alloy high-speed steel is mainly composed of martensite and boron-carbon compounds. The boron-carbon compounds are mainly distributed in a continuous network in the as-cast state. After quenching, the boron- Quenching temperature increases, the more obvious breakage tendency of the carborane compounds, and some carbon boron compounds into the matrix, and promote the strengthening of the matrix. The change of tempering temperature has no obvious effect on the boron compounds. However, with the increase of the tempering temperature, the secondary carbon-boron compounds will be precipitated in the martensite to decrease the solid solubility of the alloy in the matrix. As the quenching temperature increases, boron-bearing low alloy high speed steel roll material hardness increases. As the tempering temperature increases, the hardness begins to decrease.