The earliest mold surfacing repair is applied in the aerospace, aerospace and military fields, and is widely used in the industrial field. It is a relatively mature technology. Mold surfacing repair is widely used in EU countries, and it has been introduced to China for about 10 years. Because it can greatly reduce production costs, domestic die forging companies are competing to adopt.

At present, the process flow of domestic die forging surfacing repair is generally: pre-weld cavity cleaning - mold 450 ° C preheating - welding - 450 ° C normalization after welding - air cooling - 530-570 ° C tempering (1-2 times) - air cooling To room temperature - machined. The updated mold surfacing technology omits the tempering process, and the advantages are obvious:

1, save time

The tempering process is omitted, and the subsequent heating, heat preservation and slow cooling processes are omitted, which can save 2-5 days of processing time.

2, improve the utilization rate of electric furnace

The tempering process is omitted, and only 450 ° C is normalized. The normalizing temperature and the mold preheating temperature are both 450 ° C, so that the preheating and normalization can be carried out in the same electric furnace, and the mold can be continuously placed in the electric furnace without batches. This improves mold repair speed and furnace utilization.

3, the cost of the mold substrate is reduced

The domestic large and medium-sized molds are generally made of 5CrNiMo. The hardness of this material is generally low. The hardness will be greatly reduced with the repair and the life of the mold will be reduced. The new mold can only solve the problem by only 450 °C normalization, so that the substrate cost. Greatly reduced while increasing the lifespan by 30-50%.

4, reduce the use of welding consumables

The new mold surfacing technology mold substrate has a guarantee of the hardness of the substrate, generally only need to weld 12mm thickness of welding consumables, reducing the amount of welding consumables repaired by the mold.

5, reduce machining costs

The hardness of the welding consumables used in the new mold surfacing technology is lower than that of the original welding consumables. The hardness of the large and medium-sized molds after welding is 45HRC, and the hardness of the small molds is about 52HRC. This is very advantageous for machining and accepts the labor and tool costs.

This new technology not only saves forging companies a lot of mold costs, but also improves production efficiency and reduces the subsequent processing costs of forgings. It is believed that more forging companies will adopt this technology.

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Label: Advantages of new mold surfacing technology

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Piloted Aircraft Stop Countersink Cutters

Hss Straight Shank Twist Drill Bit-Piloted Aircraft Stop Countersink Cutters

Piloted Aircraft Stop Countersink Cutters (often called Micro-Stop Cutters, or Microstop Countersinks) are used to make precision countersinks to accept flush-head fasteners and are used throughout the aviation industry. Omega Technologies cutters are precision ground to exact tolerances to insure concentricity.

Cutters may be used in any micro-stop ''cage'' that accepts 1/4 - 28 threaded shank cutters. Select the pilot diameter that matches the pre-drilled hole, and the body diameter according to the diameter of the fastener head. Metric piloted aircraft stop countersink cutters and other sizes not listed here, can be quoted on request.

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