高强度高韧性非调质钢生产抗拉强度８００Ｎ／ｍｍ￣２级的机械结构用钢时，产品的坯料经过加热锻造之后，要进行淬火、回火的调质处理工艺。为了达到不用调质处理的目的，开发了非调质钢。并以实用性为目的，推进汽车和建筑机械配件的进步。最近，采用合金钢经淬火、回火... High-strength high-toughness non-quenched and tempered steel production tensile strength of 800N / mm ~ 2 level of the mechanical structure of steel, the product after the blank forging, to be quenched and tempered quenching process. In order to achieve the purpose of quenching and tempering, non-quenched and tempered steel has been developed. And for practical purposes, promoting the progress of automobile and construction machinery parts. Recently, the use of alloy steel by quenching, tempering ...