Key Program for Non-Equilibrium Phase Diagram of Ni 1 Type Steel

Abstract

The practical air-cooling new-type dynamic phase diagram and nonequilirium lever rule of Ni 1 structural steel was established, and the relevant structure and chemical composition were analyzed, which can be used in practical production. The computer programs for drawing binary non-equilibrium phase diagram of Ni type structural steel have designed.

Program Drawing the Dynamic Phase Diagrams of MnCrNiMo Type Steels

“…The literature [1,3] gave a more applicable new-type continuous cooling transformation curve diagram for MnCrNiMo type structural steel by taking the temperature as Y-coordinate and the diameter of steel parts as X-coordinate, from which it is possible to directly read the structural change information of the steel parts with any diameter in the related figures in the collective drawings after air, oil and water cooling. The core structures in a non-central position or non-circular section of steel parts can be obtained through conversion by means of equivalent diameter, and for the relevant concepts, see the literature [1,3] in detail.…”

“…Therefore, the author has established a new-type air-cooling dynamic phase diagram based on the new-type continuous air-cooling transformation curves, which is hereinafter called the new-type dynamic phase diagram for short. It can be mutually analyzed and compared by contrast with the common dynamic phase diagram [1][2][3].…”

“…MnCrNiMo type structural steel has its specific CCT curves and in practical application, it is necessary to firstly forecast or evaluate the actual cooling curves of this steel and then superpose the actual cooling curves on the existing CCT curves of this steel for analysis, which is inconvenient in use.The literature [1,3] gave a more applicable new-type continuous cooling transformation curve diagram for MnCrNiMo type structural steel by taking the temperature as Y-coordinate and the diameter of steel parts as X-coordinate, from which it is possible to directly read the structural change information of the steel parts with any diameter in the related figures in the collective drawings after air, oil and water cooling. The core structures in a non-central position or non-circular section of steel parts can be obtained through conversion by means of equivalent diameter, and for the relevant concepts, see the literature [1,3] in detail.Establishment of the New-type Dynamic Phase Diagrams of MnCrNiMo Type Steel. The left chart in Fig.…”

“…Therefore, the author has established a new-type air-cooling dynamic phase diagram based on the new-type continuous air-cooling transformation curves, which is hereinafter called the new-type dynamic phase diagram for short. It can be mutually analyzed and compared by contrast with the common dynamic phase diagram [1][2][3].Based on the new-type continuous cooling transformation curves of 30MnCrNiMo type structural steel (Fig. 1), 30~45 MnCrNiMo type structural steel, the new-type dynamic phase diagrams (Fig.…”