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首页> 外国专利> METHOD FOR PROCESSING PREFORMS OF HYPER-EUTECTOID DOLLAR G(G)+ DOLLAR G(A)2 ALLOYS

METHOD FOR PROCESSING PREFORMS OF HYPER-EUTECTOID DOLLAR G(G)+ DOLLAR G(A)2 ALLOYS

机译：超共晶美元G（G）+美元G（A）2合金瓶坯的加工方法

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摘要

The present invention pertains to the field of metal and alloy processing and can be used for producing preforms and articles having a regulated structure as well as a microstructure with a homogenous fine granulation of up to 0.1 mu m. The preforms of hyper-eutectoid gamma + alpha 2 alloys are first heated and submitted to deformation. The preform deformation is carried out in a temperature range of 700 DEG C to Tie /i DEG C, in which Tie /iis the eutectoid conversion temperature, at rates of 10-4 to 10 s-1 in II/I steps and with in/i transitions per step, and according to a global deformation ratio SIGMA epsilon ensuring the grinding and size reduction of the grains by recrystallisation. The temperature Ti and the deformation rate epsilon ii/i of a preform in each step are determined according to the experimental results of uniaxial compression on iNi/i models under isothermal conditions. The size of the grains/colonies is equal to id/i provided that di1/i = id/ipref. The number of steps is determined from the successive reduction of the grain size in the starting preform until a target value is reached.
机译：本发明涉及金属和合金加工领域，可用于生产具有规则结构以及具有至多0.1μm的均匀细粒的微结构的预成型件和制品。首先将超共析γ+α2合金的预成型坯加热并使其变形。预制棒的变形是在700℃至T℃的温度范围内进行的，其中T℃是共析转变温度，速率为10℃。以4>到10 s <-1>的步长，每步过渡 n ，并根据整体变形比SIGMA epsilon确保砂轮的磨削和减小尺寸晶粒通过重结晶。根据等温条件下 Ni 模型上单轴压缩的实验结果，确定每个步骤中预成型坯的温度Ti和变形率εi。假设d 1 = d pref，则晶粒/殖民地的大小等于 d 。从开始减小预成型坯中的晶粒尺寸直至达到目标值来确定步数。

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