摘要:Investigations show that the mechanical properties of Al alloys ZL101. ZL104.ZL105.ZL201 and ZL205 would be decreased by increasing casting wall thickness, but these effects are more notafble in ZL201 and ZL20D than in ZL101 .ZL104 and ZL105 alloys.
摘要:This paper deals with the effect of Zn on the structure and properties of Al-Si alloy. Eutectic cell structure is formed in the modified slloy by addition of certain Zn. The alloy containing19~25 percent of Zn has higher wear-resistance than ZA-27, with tensile strenth 280~320MPa.
摘要:The insulating and strength properties are importent parameters to evaluate perma nent mold coatings.The paper presents two methods,namely,the soaking method for meaeuring thermal conductivity and the drawing method for shearing strength of the coatings,thus provid ing relislle basis for testing and eoaluating coating mixtures.