Cryogenic treatment process formulation elements

2012-11-06 10:17:00

What kind of cryogenic treatment process is used in actual production? I think we should consider the following factors:

 1. What performance is required to improve

 Is it to improve dimensional accuracy or impact toughness? Is it to increase hardness, wear resistance or other conductive properties? Different requirements determine different processes.

 2. The material of the workpiece

 The difference in the workpiece material determines its Mf point, and the temperature of the cryogenic treatment should generally be lower than its Mf point, so the temperature of the cryogenic treatment is related to the workpiece material.

 3. The size and geometry of the workpiece

 The size of the workpiece determines the holding time of the workpiece, and the geometry determines whether the cryogenic treatment requires pre-stress relief in the previous process, and the speed of cooling is mainly determined by the geometry of the workpiece and its stress state.

 4. Cost to performance ratio

 On the premise of being able to meet customer requirements and reducing costs as much as possible, the division of labor in modern enterprises is very clear, and there are requirements for cost control at each stage of the supply chain. As a manufacturing company, cost performance should also be considered. In terms of effect, cryogenic treatment is, of course, the lower the temperature, the better the effect. But considering the cost issue, in actual production, everyone usually achieves a point below the Mf point. However, this process can solve some of the problems of residual A. As for the precipitation of ultra-fine carbides and the reduction of tissue stress (this point is solved during the tempering process, the greater the temperature difference, the better the effect). The effect is not obvious.

 Only after fully considering the above factors can the cryogenic treatment process be scientifically formulated. The cryogenic process includes the following:

 1. Cryogenic pretreatment

 2. Processing temperature

 3. Processing time

 4. Cooling speed

 5. Cryogenic times

 6. Cryogenic post-processing

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