在若干半成品加工厂中,挤压时用氮来冷却工具,但却没有关于氮冷却效果方面的可靠资料.在德国金属学学会挤压委员会内部,也对这一课题开展了问题调查活动、生产经验千差万别,关于用气体冷却介质冷却工具的效果方面,部份结论是相互矛盾的.因而在310吨力的试验挤压机上作了一些试验,以此作为综合评价的基础. In several semi-finished processing plants, the tool is cooled with nitrogen to compress the tool but there is no reliable data on the effect of cooling the nitrogen, and a questionnaire survey was conducted on the subject within the German Institute of Metallic Extrusion Committee, producing With so many different experiences, some of the conclusions contradictory with regard to the effect of using gas-cooling media on cooling tools, so some tests were carried out on a 310-tonne test extruder as a basis for a comprehensive evaluation.