1 The design of the melting zone for extruder screw was optimized.

2 The solidification structure in the melting zone, which has an important influence o...

3 A simplified mathematic model of the melting zone for extruder screw was established and solved by the complex method to minimize the specific energy consumption.

4 The 3 D dynamic thermal simulation test of the soft melting zone shape of BF has been carried out in a laboratory.

5 The research results for BF dissection show that softening and melting zone commonly is reversed "V" shape, the "coke window" in which reacts "aeration".

6 The improvement results from a change in the essential constitution of the soft melting zone when charged with an ore and coke mixture.

7 It is thought that under the present conditions, with improved burden materials more plain CO_2curve of double peaks type,[] 'W'and'inverted V'shape of softening melting zone ore to be sought.

8 Combined with the former experiment for solid conveying zone and melting zone, the torque for extruding zone was obtained.

9 The results show that its section has been divided into melting zone, heat influence zone and base metal.

10 The difficulty to harden high-Carbon- Chromium contained iron is caused by the melting zone, which may bring two problems: tiny cracks and low hardness of residual austenite.