技术解说特殊钢钢材()机械构造用钢77.pdf

技術解説>特殊******材(Ⅰ):機械構造用*** 77
技術解説
Technical Review
特殊******材(Ⅰ):機械構造用***
秦野敦臣*
A Review on Recent Special Steels(Ⅰ) : – Structural Steels –
Atsumi Hatano
Synopsis
When looking back on these ten years, the main key word related to the material development includes "Simultaneous the
world", "Drastic transformation", and "Negative environmental impact decrease", etc.
It can be said that "Negative environmental impact decrease" that assumes the amount of the CO2 exhaust to be one quantitative
index joins as an axis of coordinate of new development in addition to making to high strength so far and lowering the cost, and
the priority level rose rapidly in the steel material development according to such a background.
About the miniaturization, the adoption of the high strength material and the technique of making to high strength is requested
to down it by the part reduction and one size, and lowering the cost in which the process of manufactures of lightening and parts
for parts or the entire units are changed is achieved by the alloy design and optimizing the part manufacturing process.
Development and the practical use of the negative environmental impact decrease steel advance to limit the use of the negative
environmental impact material, the rare metal also soars as a negative environmental impact decrease, and the material
development that pays attention t