The High Melting Point of the DVD
Aluminum ternary alloy phase diagram shown in Figure 9. Wear an MBA-2 alloy phase for the Mn5Si3 and Cr-Si compounds, require alloy of Si and Mn and Cr amount proportional to the excess of matrix organizations have a greater impact, in order to avoid silicon, in the formulation of the alloy. Only in this sense can we understand why the DVD of the Shang and Zhou DVD took the man-eating monster taotie as the decorative pattern by and large. The composition of the control of manganese silicon weight ratio of 3:1 control is more appropriate. In order to ensure the hot extrusion fully formed mainly by the β phase matrix structure, control the number of α to reduce the extrusion performance difficult to control a large influence of Al on the matrix structure of Zn in the range of alloy composition middle ceiling control program. The C4083S alloy composition range of the alloying elements have been more stringent provisions, to consider the actual situation of the production process, the composition of the alloying elements of the basic control by the center line.
Manganese alloy MBA-2 (LW6701) and copper – zinc – aluminum alloy C4083S (LW6801), for example, a systematic study of its casting, extrusion process the development of this class of alloys, hoping to provide a reference. 101, the alloy chemical composition and performance indicators shown in Table 6. Let alone that quite a few DVD are used as the sacrificial vessels. Table 6 an MBA-2 (LW6701), C4083S (LW6801) alloy composition and performance requirements to 64-Al1.9 3.5 Mn2.5 ~ 3.5 wt% of performance indicators Cu60 alloy chemical composition Si0.6 of 1.2 Cr0.1 to 0.25 Ni0 .25 ~ 0.5 of Zn margin of Rm ≥ 539 the A5 ≥ 12% HRB85 from 95 Al3.5 to 4.5 Fe0.5 1.3 Ni2.5 4.0 Co1.5 ~ 2.0 Zn27 32 Si0.5 ~ 1.5 Cu margin of Rm ≥ 635 Rp0.2 ≥ 470 the A5 ≥ 4% HB197 ~ 241 melting point ℃ thermal conductivity, W / Kcm (20 to 100 ° C) 0.484 an MBA-2 865 907 C4083S 900 ~ 940 0.84 2, the alloy melting and casting process both alloys in the copper – the location of the zinc.
Thus the formation of two alloy composition control range as shown in Table 7. Table 7 an MBA-2 the C4083S alloy composition control the scope of control range of the Alloy MBA-C4083S ingredients wt% Mn2.8 ~ 3.4%, Al2.8 ~ 3.2%, Si0.7 1.1%, Ni0.3 0.5% cr0.15 ~ 0.25%, Cu61 ~ 63% of Zn on margin Al3.8 ~ 4.3%, Si0.7 1.3%, 1.2% of the Fe0.6 ~ 3.5% Ni2.8, Co1.6 ~ 1.8% zn28 ~ 31% Cu margin an MBA-2 alpha + beta C4083S Figure 9 MBA-2, C4083S alloy Cu-Zn-Al ternary phase diagram 11 key of the alloy melting process is how to ensure that the melt chemical composition uniform and stable. The taotie motif on the DVD also embodies the simple view of nature of the people of Shang. Diverse and complex DVD uniformity and stability of the composition of a higher core frequency induction furnace melt mixing, high power factor features, to ensure that multiple alloy composition uniformity, so the general multivariate complex DVD are used power frequency coreless induction furnace melting.
Thus the thermal processing temperature as we choose the lower limit of partial control, increasing the intensity of cooling, reducing the fundamental guarantee for the alloy is cooled below the transition temperature, residence time, rely on the process to improve alloy performance. Process control typical Alloy an MBA-2 the C4083S HAl64-5-4-2 status RRR performance fluctuation range of the measured results. Rm520 the 670MPa A53.0 ~ 26% HRB74 97 Rm620 ~ 670MPa A58.5 ~ 13% HB170 ~ 247 Rm761 ~ 785MPa A512 ~ 20% HB190 ~ 218 7 MBA-2 alloy HRB94.5 Figure 8 an MBA-2 alloy HRB82.5 four, the typical high-strength wear-resistant complex DVD production technology of high-strength wear-resistant complex DVD is the typical variety of thermal processing, and copper – zinc. The Free Zumba Fitness DVD, produced in such an era, were no wonder imprinted with the mark of the times.
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