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弄清軋輥的使用條件以及在同類型軋機中所用軋輥的失效方式，了解當前各種軋輥材質的性能和制造工藝，才能較正確地制定該軋機用輥的技術條件和選用合適而經濟的軋輥材質。

We must know clearly the condition of the roller and the failure way of the roll used in the same type of rolling mill, and understand the performance and manufacturing technology of all kinds of roller material at present, so that we can correctly formulate the technical conditi of the roller and choose the right and economical roller material.

焊接時堆焊成敗的關鍵環節，要獲得理想的堆焊層必須綜合考慮某些可變因素，如：焊接電壓、焊接速度、軋輥轉速、軋輥的保溫、焊接電流、焊接材料等，對一些含碳及合金元素高的輥芯，為防止脆性區的裂紋，除一定的預熱措施外，多采用低碳低合金過渡層進行預先堆焊過渡層。Therearethreemainformsoftheshaft。  

In order to obtain an ideal surfacing layer, some variable factors must be cidered, such as welding voltage, welding speed, roll speed, roll insulation, welding current, welding material and so on. Some roll cores with high carbon and alloy elements, in order to prevent cracks in brittle zone, have to be cidered in order to obtain ideal surfacing layer. In addition, the low carbon low alloy transition layer is used to pre weld the transition layer.

軋輥按材質主要分為哪幾種類別？

軋輥按制造材料主要劃分為鑄鋼系列軋輥、鑄鐵系列軋輥和鍛造系列軋輥三大類別。

What are the main categories of the roll according to the material?

Rolls are mainly divided into three categories: cast steel series rolls, cast iron series rollers and forging series rolls.