Method for preparing high-hardness wear-resistant powder metallurgical rolling sleeve
A powder metallurgy and wear-resistant technology, which is applied in the field of shaft sleeves, can solve the problems of reducing the macroscopic hardness and strength of materials, and the performance of powder metallurgy roller sleeves or shaft sleeves is difficult to meet the requirements of compressor use, and achieves the effect of low cost.
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[0030] Embodiment: The method for preparing a high-hardness and wear-resistant powder metallurgy roller sleeve in this embodiment is manufactured by a powder metallurgy process, and specifically includes the following steps in sequence:
[0031] ① Mix powder, mix iron powder, carbon powder, chromium powder or ferrochromium alloy powder, and lubricant, and ensure the percentage by weight of the total components of iron, carbon, and chromium: carbon is 0.3-2%, chromium is 0.5 ~4%, 0.1~2% of lubricant, no more than 2% of unavoidable impurities, the balance is iron;
[0032] ②Forming, the density after forming is greater than 6.8g / cm 3 ;
[0033] ③Sintering, the temperature is 1000~1350℃, preferably 1150~1350℃, and the time is at least 20 minutes;
[0034] ④Machining, for the part 100 that is difficult to be formed by the mold (such as figure 1 As shown in), such as installation slots, etc., are processed by machining methods, which can be turning, milling, grinding, drilling, boring...
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