公开(公告)号：US20040140018A1

公开(公告)日：2004-07-22

申请号：US10752029

申请日：2004-01-07

Applicant: SHOWA DENKO K.K.

Inventor： Masahiro Sato ,  Fumihiko Ohmi ,  Yuichi Ogura

IPC: C22C021/02

CPC classification number: B21J5/00 ,  B21C23/14 ,  B21C23/16 ,  B21C23/183 ,  B21K3/00 ,  C22C21/02 ,  C22C21/04 ,  C22F1/043 ,  F04C18/0246 ,  F04C2230/25 ,  F05C2201/903

Abstract: A process for producing an aluminum alloy-made forged scroll part includes a step of casting an aluminum alloy material into a round bar having a diameter of 130 mm or less, the aluminum alloy material comprising 8.0-12.5 mass % of Si, 1.0-5.0 mass % of Cu and 0.2-1.3 mass % of Mg; a step of cutting the aluminum alloy round bar into a stock material for forging; a step of subjecting the stock material to upsetting at an upsetting ratio of 20-70% to form a pre-shaped product that is a workpiece; and a forging step of applying pressure onto the workpiece with a punch at a temperature of 300-450null C. to form a scroll wrap in a direction of the punch pressure, and wherein the forging step includes a single step in which a forged scroll part is press-formed while a back pressure smaller than the punch pressure is applied to an end of the scroll wrap in a direction opposite to the punch pressure direction. With this method, it is possible to produce a forged scroll part capable of suppressing occurrence of coarse primary Si crystals and reducing a variation in height of a wrap in a scroll part and in every scroll part being forged.

Abstract translation: 制造铝合金锻造涡卷部件的方法包括将铝合金材料铸造成直径为130mm以下的圆钢棒的步骤，所述铝合金材料包含8.0-12.5质量％的Si，1.0-5.0 Cu的质量％和Mg的0.2〜1.3质量％ 将铝合金圆棒切割成用于锻造的原料的步骤; 以20-70％的镦锻比使原料镦锻以形成作为工件的预成型品的工序; 以及在300-450℃的温度下用冲头对工件施加压力以在冲压压力的方向上形成涡卷的锻造步骤，其中锻造步骤包括单个步骤，其中锻造的涡卷 部分被压制成型，同时小于冲压压力的背压在与冲压压力方向相反的方向上被施加到涡卷的端部。 通过这种方法，可以制造能够抑制粗一次Si晶体的产生的锻造涡卷部件，并且减少涡卷部分中的涡卷部分和锻造的每个涡卷部分中的涡卷的高度变化。