Abstract:  Forging and different post-forging heat treatment processes for 430F ferritic stainless steel in rolled condition. The effects of microstructure and properties of the forging 430F stainless steel at different heat treatment processes are studied by metallurgical structure， microhardness， tensile properties and fracture analysis of the test steel after heat treatment. The study shows that 430F stainless steel after forging， 850 ℃ × 4 h high temperature annealing， cooling with the furnace， 550 ℃ out of the air-cooled， and then 350 ℃ × 10 h tempering， cooling with the furnace， the microstructure of its composition by the ferrite single-phase ferrite matrix， the distribution of a large number of fine and uniformly distributed spherical carbides along the grain boundary precipitation σ-phase number is the least. The tensile strength of the test steel is 516 MPa， the hardness is 181 HV， and the elongation rate reaches 29.9%. There are a large number of regular toughness nests on the fracture surface， and the test steel has good plasticity and toughness.

Key words: Forging, Heat Treatment, 430F Stainless Steel, Microstructure, Mechanical Properties

摘要： 对轧制态430F铁素体不锈钢进行锻造及不同的锻后热处理工艺。通过对热处理后试验钢的金相组织、显微硬度、拉伸性能、断口分析等的研究探索了不同热处理工艺对锻后430F不锈钢组织与性能的影响。研究表明，430F不锈钢经锻造后进行850 ℃×4 h高温退火，随炉冷却到550 ℃出炉空冷，然后再进行350 ℃×10 h回火后炉冷，其组织由铁素体单相组成，基体内分布着大量细小且均匀的球状碳化物，沿晶界析出的σ相数量较少。试验钢的抗拉强度为516 MPa，硬度为181HV，伸长率达到29.9%，其断口表面存在数量较多、形态规整的韧窝，试验钢具有良好的塑性和韧性。

关键词: 锻造, 热处理, 430F不锈钢, 显微组织, 力学性能