R Paventhan
,
P R Lakshminarayanan
,
V Balasubramanian
钢铁研究学报(英文版)
Friction welding is a solid state joining process used extensively currently owing to its advantages such as low heat input, high production efficiency, ease of manufacture, and environment friendliness. Materials difficult to be welded by fusion welding processes can be successfully welded by friction welding. An attempt was made to develop an empirical relationship to predict the tensile strength of friction welded AISI 1040 grade medium carbon steel and AISI 304 austenitic stainless steel, incorporating the process parameters such as friction pressure, forging pressure, friction time and forging time, which have great influence on strength of the joints. Response surface methodology was applied to optimize the friction welding process parameters to attain maximum tensile strength of the joint. The maximum tensile strength of 543 MPa could be obtained for the joints fabricated under the welding conditions of friction pressure of 90 MPa, forging pressure of 90 MPa, friction time of 6 s and forging time of 6 s.
关键词:
friction welding
,
stainless steel
,
response surface methodology
,
optimization
陈红，吕永康，张继斌，杨锦文
钢铁
运用钢包运行周期方法详细统计了钢包在各环节的停留时间,研究了温降规律，计算出钢包运行周期和合理钢包运行个数，并发现钢包运行期间存在的主要问题是：钢包实际投入运行的个数较多,空包运行时间较长，在线烘包时间较短。通过对钢包运行的优化控制，不但缩短了钢包运行的周期，确定出合理的钢包运行个数，而且使空包运行速度加快，钢包运行的工序时间缩短了10min，基本实现了正常生产情况下的红包出钢。钢包的运行控制对节省能源、降低钢包个数，特别是稳定和降低钢水的浇铸温度、促进连铸的顺行和提高铸坯的质量均有着重要意义。
关键词:
钢包
,
running
,
statistics analysis
,
optimization
