Abstract: A sintered Ti alloy material and a process for producing the same, which comprises a matrix mainly comprising a Ti alloy, and TiB dispersed and maintained in said matrix, wherein a composition of the sintered Ti alloy material at least comprises from 0.1 to 8.0% by weight of B, from 3.0 to 30.0% by weight of Mo, 50% by weight or more of Ti, and the balance of unavoidable impurities.

Abstract: High moisture-absorbing and releasing fibers exhibiting excellent moisture-absorbing properties and moisture-releasing properties, capable of withstanding repeated use, having both flame resistance and antibacterial properties, and further having excellent whiteness and workability, as well as processes for their production, are provided. These fibers are made from acrylic fibers and have been particularly adjusted to have an increase in nitrogen content by hydrazine crosslinking, amounts of salt type carboxyl groups and amido groups, tensile strength, limited oxygen index (LOI), sterilization rate, amount of heat evolved by moisture absorption, and whiteness. The production of these fibers are achieved by hydrazine crosslinking treatment, acid treatment, alkali treatment, and conversion of carboxyl groups into those of the salt type. The above fibers can be used for various purposes and can find an enlarged range of applications.

Abstract: A ferritic heat-resistant cast steel includes C in an amount of from 0.1 to 0.4% by weight, Si in an amount of from 0.5 to 2.0% by weight, Mn in an amount of 1.0% by weight or less, S in an amount of from 0.06 to 0.20% by weight, Ni in an amount of 1.0% by weight or less, Cr in an amount of from 13 to 20% by weight, V in an amount of from 0.2 to 1.0% by weight, at least one element selected from the group consisting of Nb in an amount of from 0.1 to 0.4% by weight, Mo in an amount of from 0.1 to 2.0% by weight, and W in an amount of from 0.2 to 4.0% by weight, and the balance of Fe and inevitable impurities, the S being dispersed as sulfides in the ferritic heat-resistant cast steel. It can further include at least one element selected from the group consisting of Te in an amount of from 0.01 to 0.1% by weight and Al in an amount of from 0.01 to 0.5% by weight. It can be produced by melting and casting the alloying elements and thereafter by annealing the resulting cast product at a temperature of from 750.