MECHANICAL PROPERTIES OF SINTER/FORGED LOW-ALLOY STEELS

The paper describes preliminary work on sinter/forged low-alloy steels. The mechanical properties and structures of both atomized and blended alloys were investigated. By using a good-quality atomized powder of the SAE 4600 type, tensile and fatigue properties equivalent to those of wrought steels could be obtained. Atomized alloy powders with higher oxygen contents had poor ductility and impact values because of surface oxides on the powder particles.Blended iron alloys gave tensile strengths up to 72 tonf/in2 (1112 MN/m2) with much higher ductility and impact-resistance than would be obtained with conventionally pressed and sintered alloys.