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随着冷挤压技术的飞快发展,特别在钢件冷挤加工中,要求挤压出的零件越来越复杂,变形量越来越大,对挤压前润滑处理要求也愈来愈高。零件挤压过程中的温升也急剧增高。目前,在钢件冷挤时,被挤压件升温可达250～300℃以上。在这种高温状态下,原来的磷酸锌处理层的耐热性已不能适应了,处理层结晶破裂,材料与模具剧烈摩擦粘附,工具寿命急剧缩短。
With the rapid development of cold extrusion technology, especially in the cold extrusion of steel parts, extrusion parts require more and more complex, increasing the amount of deformation, the extrusion lubrication requirements are also getting higher and higher. Parts of the extrusion process of the temperature rise is also dramatically increased. At present, when the steel cold extrusion, the extrusion temperature up to 250 ~ 300 ℃ above. In this state of high temperature, the original heat treatment of zinc phosphate coating has been unable to adapt to the processing layer crystallization crack, the material and the mold friction adhesion, the sharp reduction in tool life.