The Production of Steel Forged Parts with High Mechanical Properties by FIR-A Method of Thermo-mechanical Control Treatment
One of the side benefits of producing lighter-weight automobiles and motorcycles is the reduced energy and resource consumption of the transport vehicles used to convey the finished product. The part requiring the greatest weight reduction in automobiles and motorcycles is the engine. Many of the engine parts which move back and forth (such as connecting rods) or rotate (such as crankshafts), that is, the parts subjected to heavy loads, are forged. The mechanical properties of these forged parts must include high rigidity, high fatigue performance, and high yield strength. A fine metallic structure is an effective way to ensure that forged parts satisfy these requirements. In a newly developed method for modifying conventional microalloyed steel, a process of precipitation strengthening during forging results in forged parts with a high tensile strength of 1,000 N/mm2 (conventional steel: 850 N/mm2) and a high yield strength of 800 N/mm2 (conventional steel: 500-650 N/mm2). FIR (Forged Isothermal Refining) is a method of thermo-mechanical control to keep the temperature after hot forging at a constant level. FIR conserves energy by using the potential heat generated during the hot forging. This report presents case studies of the application of FIR, the principal method we have used so far for mass-production forging in ausforming at Gohsyu Co.
thermo-mechanical control treatment FIR (Forged Isothermal Refining) controlled forging isothermal heat treatment fracture splitting connecting rod
Yoshinori Goho Nobuhiro Nishihata
Gohsyu Corporation,2-2-1,Ishibe-midoridai,Konan-city,Shiga,520-3189,Japan
国际会议
The Fourth Asian Conference on Heat Treatment and Surface Engineering(第四届亚洲热处理及表面工程大会)
北京
英文
197-199
2009-10-27（万方平台首次上网日期，不代表论文的发表时间）