金属间化合物的比热容估算模型

在分析已有的热力学数据基础上,建立了估算二元金属间化合物比热容的双参数模型.用此模型可以估算由简单金属形成的二元金属间化合物的比热容,涉及Fe、Si、Nb、Ti、Cu、Co和Mg等多个体系.估算了132个已知金属间化合物AlCa、AlCo、CrNi、FeTi、FeSi、FeNb和MoSi等的比热容,平均误差为2.74J·mol^-1·K^-1,标准差为3.84J·mol^-1·K^-1.用双参数模型估算的比热容精度高,其估算误差小于离子束缚模型.     

Developing regimes for the heat treatment of tool steel 1.2344 with a specific structure

A regime for heat-treating forgings of steel 1.2344 (the analog of steel 4Kh5MF1S) has been developed, tested, and optimized to ensure that the structure of the forgings meets the requirements of the NADCA standard and specification SEP 1614. A study was made of the microstructure of forgings of steel 1.2344 after annealing and normalizing under different conditions. It was found that the structure of the forgings made in the forging-extrusion shop at Spetsstal’ meets the NADCA standard and specification SEP 1614 when the forgings are subjected to normalizing and tempering.