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提高高速钢性能稳定性的途径之一就是调整其化学成份,加入微量合金元素以及用氮、钛、锆、铈和其他元素来进行变性处理。高速钢的基本性能与其相组成和M6C、M_7C_3和MC等碳化物相的含量有关,强力碳化物生成元素钒对相组成关系的影响最大。研究了八炉钨钼高速钢的组织和性能,这些钢的化学成份(见表1)与P6M5钢近似。上述各炉钢在真空感应炉内熔炼后浇注入金属模内,而获得尺寸为7×15×25毫米的淬火刀片。刀片的硬度、显微组织和相组成,用YPC—50NM衍射仪测定。利用过滤后的k_α铁射线直接拍摄试片的X照片。为了研究刀片的性别,淬火刀片(金属模
One of the ways to improve the stability of high-speed steel is to adjust its chemical composition, add trace alloying elements and modify it with nitrogen, titanium, zirconium, cerium and other elements. The basic properties of high speed steel are related to its phase composition and the content of carbides such as M6C, M7C3 and MC. The effect of the strong carbides on vanadium formation has the greatest influence on the phase composition. The organization and properties of eight furnaces of tungsten-molybdenum high-speed steel were studied. The chemical composition of these steels (see Table 1) was similar to that of P6M5 steel. Each of the above steels was melted in a vacuum induction furnace and poured into a metal mold to obtain a hardened blade having a size of 7 × 15 × 25 mm. The hardness, microstructure and phase composition of the inserts were measured with a YPC-50NM diffractometer. The filtered k_α iron ray was used to take a direct X-ray photograph of the test piece. In order to study the gender of the blade, hardened blades (metal molds