| Popis: |
Nowadays, high frictional and low aggressive disc brake is required. For designing it, we have had to depend on empirical way because brake pad is complicated composite. We therefore attempted to optimize abrasion caused by abrasive which is one of the most important containing materials in brake pad. However, in general abrasion, high friction cannot provide low aggressiveness. In order to overcome this issue, we focused on degree of wear fab which has an effect on the ratio of wear coefficient to friction coefficient K / μ. In our previous (1st) report, by conducting scratch test with using 4 types of abrasives (CFP, FFP, AP1 and AP2), we clarified the effect of abrasive shape (open angle φ) on degree of wear fab ; degree of wear fab increased with increasing open angle φ except in FFP. Then we proposed small open angle abrasive for high frictional and low aggressive disc brake. This report, we conducted scratch test with using 7 disc materials as counter-part: SUS304, FC200, Pure Al, Pure Cu, Ti-Al-V, Ni-Cr-Fe and Al-Mg-Mn. Then we confirmed that in all disc materials degree of wear fab increased with increasing open angle φ, which strengthened our 1st report and we clarified the effect of property of disc material (toughness W) on degree of wear fab ; degree of wear fab decreased with increasing toughness W. Thus we proposed small open angle abrasive and tough disc material for high frictional and low aggressive disc brake. |
