Al-mg-si-ni alloy and al-mg-si-ni alloy material

Abstract

Provided are a high-strength 6000 series aluminum alloy having exceptional plastic workability even when the Fe content is increased in association with recycling of scrap material, and an aluminum alloy material composed of said aluminum alloy. The present invention relates to an Al—Mg—Si—Ni alloy characterized by containing more than 0 to 2.0 wt % of Fe and containing Ni such that 0.7≤Ni (wt %)/Fe (wt %)≤3.5. The alloy preferably contains 0.5-1.4 wt % of Si, 0.6-1.7 wt % of Mg, 0.1-2.5 wt % of Ni, and 0.1-2.0 wt % of Fe, the balance being Al and inevitable impurities.

1 . An Al—Mg—Si—Ni-based alloy, which comprises:
 more than 0 and not more than 2.0 wt % of Fe, and 
 Ni which satisfies 0.7≤Ni (wt %)/Fe (wt %)≤3.5. 
 
     
     
         2 . The Al—Mg—Si—Ni-based alloy according to  claim 1 , which comprises:
 Si: 0.5 to 1.4 wt %, 
 Mg: 0.6 to 1.7 wt %, 
 Ni: 0.1 to 2.5 wt %, and 
 Fe: 0.1 to 2.0 wt %, 
 with a balance being Al and inevitable impurities. 
 
     
     
         3 . The Al—Mg—Si—Ni-based alloy according to  claim 1 , which comprises one or more of:
 Cu: 0.2 to 1.0 wt %, 
 Mn: 0.1 to 0.8 wt %, and 
 Cr: 0.1 to 0.8 wt %. 
 
     
     
         4 . The Al—Mg—Si—Ni-based alloy according to  claim 1 , which comprises one or more of:
 Zr: 0.05 to 0.20 wt %, 
 V: 0.05 to 0.20 wt %, 
 Ti: 0.01 to 0.15 wt %, and 
 B: 0.001 to 0.05 wt %. 
 
     
     
         5 . The Al—Mg—Si—Ni-based alloy according to  claim 1 , wherein Mg (wt %)/Si (wt %) is 1.73 or more. 
     
     
         6 . An Al—Mg—Si—Ni-based alloy material comprising the Al—Mg—Si—Ni-based alloy according to  claim 1 , wherein Al—Fe—Ni-based compounds are dispersed. 
     
     
         7 . The Al—Mg—Si—Ni-based alloy material according to  claim 6 , which has tensile properties of a 0.2% yield strength of 300 MPa or more and an elongation at break of 12% or more. 
     
     
         8 . The Al—Mg—Si—Ni-based alloy material according to  claim 6 , wherein a limit bending angle in the VDA bending test specified in VDA238-100 is 50° or more.