High lead bronze anti-abrasion performance is better. T […]
High lead bronze anti-abrasion performance is better. The die-casting forging process is a process performed on a dedicated die-casting die forging machine. The basic process is: the metal liquid is first filled into the cavity of the mold by low speed or high speed casting, and the mold has a movable cavity surface, which is pressed and forged with the cooling process of the molten metal, thereby eliminating the shrinkage of the blank. Loose defects also cause the internal structure of the blank to reach the forged broken grain. The overall mechanical properties of the blank are significantly improved. In addition, the blank produced by the process has an outer surface finish of 7 (Ra1.6), such as a cold extrusion process or a machined surface, with a metallic luster. Therefore, we call the die-casting forging process the “extreme forming process”, which is a step further than “no cutting, less residual forming process”. Another advantage of the die-casting forging process is that, in addition to producing traditional casting materials, it can also produce deformed alloys and forged alloys to produce highly complex parts. These alloy grades include: hard aluminum super-hard aluminum alloy, wrought aluminum alloy, such as LY11, LY12, 6061, 6063, LYC, LD, etc.). The tensile strength of these materials is nearly twice as high as that of ordinary cast alloys. It is more positive for aluminum alloy automobile wheels, frames and other parts that are expected to be produced with higher strength and impact resistant materials. When casting bronze, a trace amount of elements such as Ti, Zr, Fe or Al are added to refine the grains to form a porous casting, which is impregnated with lubricating oil to become an oil-containing bearing.
The characteristics of cast copper alloy oil-containing bearings are:
1. Need to cut.
2. Casting production, no need to form metal mold, it is suitable for the production of small and medium-sized medium and large oil-bearing bearings.
3. Compared with copper-based powder metallurgy oil-containing bearings, cast copper alloy oil-containing bearing has high bearing capacity, low wear rate and similar anti-gluing properties.
4. The porosity is low and the oil content is small, so it is often necessary to have an intermittent oil supply device.
High lead bronze