In order to study the macromorphology of the chip under different milling conditions, high speed milling of single factor experiment was designed. The milling parameters were obtained by single factor experiment on the influence of milling force, and the chip macro morphology from the change of milling speed was analyzed. Milling for chip after milling was inlayed, polished and corroded and obtained the metallographic microstructure pictures, and the chip morphology parameters were measured by using Digimizer software. The influence of milling speed was researched on the sawtooth degree and the sawtooth pitch. Through the microstructure pictures ,the chip substrate and the organization change of adiabatic shear band material under different milling parameters were analyzed, and obtained the formation mechanism of serrated chip.

According to the particularity and structural characteristics of coal mine products, a 13 classified codification system was developed. A method of part input based on feature surface description was set up, and part automatic coding was implemented in the DJ-1 CAPP system, which provides supports to the standardization and automation of process plan.

 

When the crystal field exists, the mixed spin Ising model in nearest neighbor interaction with Fe4N structure was studied within the mean field theory. The theoretic expressions of magnetization and free energy in the nearest neighbor interaction system were deduced. The influences of the nearest interactions and the crystal field on the magnetic properties were mainly explored. The ground-state phase diagram and magnetization curves in finite temperature were obtained. Abundant phase transition characters were observed in the system: reentrantant phenomena, and second-order phase transitions. It is found that second-order phase transitions are general phenomena, and second-order phase transitions must exist in the system when DA/|J1| and DB/|J1| get the adequate large values. On the boundary lines of D1 to O1and D2 to O1、O2 reentrantant phenomena may occur.

Using the mean-field theory, numerical calculation expressions for the internal energy and specific heat were obtained, within the BC model considering the transverse high spin S=2 ferromagnetic system. The thermodynamic properties were investigated mainly nearby the phase transition points of the system, especially nearby the first-order phase transition points. The longitudinal crystal field dependence of the thermodynamic properties in the system was explored. It is found in the system that there is latent heat of phase transition only in very small crystal field range and the corresponding specific heat decrease suddenly, namely the first-order phase transition appears when the transverse field remains the same value. Then with the increase of crystal field, there is no hidden heat of phase transition in the system, the internal energy changes continuously and the corresponding specific heat suddenly decreases, namely the second-order phase transition appears. When the first order-order phase transition appears specific heat increases suddenly and when the second-order phase transition appears specific heat decreases suddenly. With the decrease of crystal field the internal energy increases and the specific heat decreases within the second-order phase transition range. The internal energy and the specific heat vary complexly within the first-order phase transition range.