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——    The use of lubricants in the powder metallurgy industry
11-21

Lubricant Type Advantages Disadvantages Price Additive Cost Contrast Super Lubricant 1, powder flow performance is good. 2, the product is organic material, can be completely decomposed, no residue, no pollution, will not produce fouling. 3, effectively reduce the stripping force, to protect the mold, the product surface is smooth and clean.

4, to improve the green strength and sintering intensity, improve product density, reduce scrap rate.

5, add less, reduce production costs.

6, the part density gradient required to minimize the pressure.

7, at lower temperatures from the solid into a liquid, excellent lubrication performance. 1, suitable for iron-based powder .2, not suitable for no segregation mixing. 35 yuan / kg 0.3-0.4% 105-140 Lonza C wax (LONZA) 1, does not produce fouling, improve the green strength and sintering strength 2,100% organic matter, can be completely burned. Flow performance is poor. 28 yuan / kg 0.4-0.5% 112--140 zinc stearate cheap, the traditional lubricant produced fouling, there are residues, affecting product quality. Clean up the furnace time-consuming, cost labor. Heating up electricity again. 14 yuan / kg 0.8-1.5% 112--210 micronized wax price and quality are in the end, into the market a long time, the product density is not good, add large. (APEX) 1, attached to the surface of metal powder, and at a relatively low pressure and temperature will be able to convert from the solid into the liquid, good lubricating properties. 2, mold temperature control is relatively low. 3, adding 0.3% less. High cost: 140 yuan / kg 0.3% 420 Compound lubricant (Korea SFC, Canada HILUB) Add the accelerator, higher green strength, more effective to reduce the mold release, excellent flow properties, no residue after sintering. The price is high 100 yuan / kg 0.3% 300