【廣告】
自由鍛造是靠人工操作來(lái)控制鍛件的形狀和尺寸的,所以鍛件精度低,加工余量大,鍛造廠家,勞動(dòng)強(qiáng)度大,生產(chǎn)率也不高,鍛造生產(chǎn)商,因此它主要應(yīng)用于單件、小批量生產(chǎn)。
Free forging is by manual operation to the shape and size of the forgings,鍛造哪家好, so the precision of the forgings is low, the processing allowance is large, the labor intensity is big, and the productivity is not high. Therefore, it is mainly used in single piece and small batch production.
若因溫度和變形程度選擇不當(dāng)而得到粗大晶粒時(shí),可利用熱處理相變細(xì)化晶粒組織,但對(duì)于熱處理中不發(fā)生相變的鋼種,如奧氏體鋼,就必須在鍛造過(guò)程中獲得細(xì)小而均勻的晶粒組織,因此對(duì)這樣的材料在鍛造時(shí)須加倍注意。
If the temperature and degree of deformation and improper selection of coarse grains, the grain refinement phase change heat treatment,鍛造, but for the steel phase transition does not occur in the heat treatment, such as austenitic steel, it must be in the forging process have fine and uniform grains, so this kind of material in the forging must pay more attention to.
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