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            當前位置:首頁>新聞中心>新聞動態>模具鋼中的工具鋼要如何進行改鍛?

            模具鋼中的工具鋼要如何進行改鍛?

            來源:http://www.pyzhcc.com/ 日期:2021-06-17 發布人:admin


            在一定的條件下.采用軋制的型材直接加工產品是合理的。盡管如此.在制造廠需要改鍛的工具鋼仍然占相當大的比重。除了熱鍛成形可以減少切削加工和充分利用鋼材等原因之外,工具鋼的改鍛有利于提高鋼材的內在質量,作用大致有以下幾方面。
            Under certain conditions, it is reasonable to directly process products with rolled profiles. In spite of this, the tool steel that needs to be forged still accounts for a considerable proportion in the manufacturing plant. In addition to hot forging can reduce machining and make full use of steel and other reasons, tool steel forging is conducive to improve the internal quality of steel, the role of the following aspects.
            1)—般說來,鋼材的截面愈小,鍛造比愈大,冶金質量本身就愈好。出此凡是需要先經過改緞再坦行加上的工具毛坯,席盡可能選用較小截面的鋼材改鍛為較大截向的毛坯,這樣有利于保證工具鋼內部有較好的冶金質量。
            1) Generally speaking, the smaller the section of steel and the larger the forging ratio, the better the metallurgical quality itself. Therefore, for the tool blank that needs to be changed to Satin first and then to smooth, the steel with smaller cross section should be used instead of forging the blank with larger cross section as far as possible, which is conducive to ensuring the better metallurgical quality of the tool steel.
            濟南模具鋼
            2)改鍛使工具鋼內部的流線分布比較合理。例如盤形銑刀如果用略大于具外徑的鋼材落料后直接進行機械加工,從鋼材利用率和降低加工成本方面考慮是合理的,然而鋼內央雜物排列的方向、碳化物偏析的排列方向都和切削刃口平行,即處于大的受力方向,對使用性能不利c如果用小規格的俐材經過改鍛
            2) The distribution of streamline in tool steel is more reasonable by changing forging. For example, if the disk milling cutter is machined directly after blanking with steel slightly larger than the outer diameter, it is reasonable to consider the utilization rate of steel and reduce the processing cost. However, the arrangement direction of impurities in the steel center and carbide segregation are parallel to the cutting edge, that is, in the direction of large force, which is unfavorable to the service performance
            (鐓粗后打扁),則流線呈放射狀(徑向)分布,改善了銑刀的性能.
            The flow line is radially distributed, which improves the performance of milling cutter
            3)通過改鍛商可能改善關鍵部位的材質,使上具受力嚴重的部他的材質獲得改 善,從而收到大幅度提高工具鋼壽命的效果。
            3) It is possible for the forger to improve the material of the key parts, so as to improve the material of the parts with severe stress, so as to greatly increase the service life of the tool steel.
            4)鍛造的加熱過程想著擴散退火的作用。工具鋼改鍛時的加熱溫度可以略高于鋼錠開壞的加熱溫度,因為在開坯和軋制之后,品內和品問偏析己明顯改 善。鋼材改銀加熱時局部熔化的傾向減小。加熱溫度愈高,保溫時劉愈長,消除偏析酌作用愈顯著。顯然模具鋼在高溫加熱的過程市奧氏體晶粒長大,似在高溫加
            4) The heating process of forging is affected by diffusion annealing. The heating temperature of the tool steel can be slightly higher than that of the ingot when the forging is changed, because the segregation in and between products has been improved obviously after the bloom and rolling. When the steel is changed to silver, the tendency of local melting decreases. The higher the heating temperature is, the longer the holding time is, and the more significant the effect of eliminating segregation is. Obviously, the austenite grains of die steel grow up in the process of high temperature heating
            熱后緊接著進行壓力加工,則可以細化英氏體晶粒,如果終鍛溫度控制得好、鍛后冷卻方式合理,則可以抑 制網狀碳化物的出現,達對于保證鋼的RJ加工性和使用件能都十分重要,因此工具鋼的終鍛溫度販予以控制,一般應控制在表3.2的范圍內。
            If the final forging temperature is well controlled and the cooling mode after forging is reasonable, the occurrence of network carbide can be restrained, which is very important to ensure the RJ machinability of steel and the performance of parts used. Therefore, the final forging temperature of tool steel should be controlled within the range of table 3.2.

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