锻造半钢、锻造白口铁轧辊系国外在六十年代末期试制的新型轧辊。该类材质对冶炼成份有害元素含量等要求严格,锻造成型困难,热处理要求高,在生产技术上有一定难度。 宝钢引进的六机架钢坯连轧机使用三种成份的轧辊。除Ni,Cr稍有差别外,主要是含碳量不同,分别为1.6-1.8％,2.0-2.2％;2.3-2.5％,Ni为0.8-1.2％,r为1.0-1.5％。其中P、S,(u、Pb、Sb、As、Bi、Sn、Zn等九种有害元素总含量要求≤0.15％。“六五”期间攻关任务为完成含碳1.6-1.8％成份的φ500中间试验辊三支,φ800宝钢用辊二支及相应的制造技术。 首先进行实验室基础数据的研究工作。根据试制要求的成份冶炼了不同质量的小钢锭共41支,进行了相变临界点的测定、连续冷却和恒温转变的C-曲线、用扭转法测定了热塑性、高温拉伸试验、小钢锭锻造试验,扩散退火试验及磷、稀土元素对热塑性影响等,取得大量数据掌握了该类材质的基本特性。 在实验室研究的基础上,进行中间产品试验辊的研制,采用精冶炼并炉外喷粉处 Forging semi-steel, forging white iron roll foreign trial in the late 1960’s new roll. Such materials on the smelting ingredients harmful elements such as demanding, forging molding difficult, high heat treatment requirements, in the production of a certain degree of technical difficulty. Baosteel introduced the six-stand steel continuous rolling mill using three components of the roll. Except for Ni and Cr, there are slight differences in the contents of carbon, which are mainly 1.6-1.8%, 2.0-2.2% and 2.3-2.5%, respectively. Ni is 0.8-1.2% and r is 1.0-1.5%. The total content of nine harmful elements such as P, S, (u, Pb, Sb, As, Bi, Sn and Zn is ≤0.15% Test roller three, φ800 Baosteel with two rolls and the corresponding manufacturing technology.First, the basic laboratory data research.According to the requirements of the trial production of smelting different quality of a total of 41 ingots, the critical point of the phase transition Thermomechanical, high temperature tensile test, small steel ingot forging test, diffusion annealing test, and the influence of phosphorus and rare earth elements on the thermoplastic have been measured by the torsion method. A great deal of data have been obtained on this kind of material Based on the laboratory research, the development of intermediate product test roller, the use of smelting and blasting outside the furnace