Chao Feng Electric Co., Ltd., Henan

Defects often appear in the process of using high frequency furnace and summary remedy method

In the process of high frequency furnace, there will be manybecause the details of the deal caused minor defects. Chao Feng electrical work in heating field for more than ten years, test and experiment, perfect this aspect of gaps and loopholes.

So then, let Henan Chao Feng electrical equipment limited company to talk about high frequency furnace in the process of using high frequency furnace using defect often appears in the process and make up method.

160KW high frequency furnace

1, pinholes

Prevention measures: the pinhole is strictly prohibited the use of contaminated casting aluminum alloy material, stained with organic compounds and be serious oxidation corrosion ofmaterials. Controlling the melting process, strengthen thedegassing. Control of metal coating thickness, too thick easy generation pinhole. Mold temperature is too high, thecooling measures on thick walled casting parts, such ascopper inlaid block or watering etc.. When the strict control of sand water, try to use dry core.

2, containing pores

Prevention of the pores produce measures: modify the gating system is not reasonable, the liquid flow smoothly, avoid gas involved in. The mould and cores should be preheated in advance, after paint, after the end must be baked through can be used. Design moulds and cores should consider enough exhaust measures.

3, oxide inclusion

Prevention of oxide inclusion measures:

Strict control of melting process, fast melting, reduce oxidation, slag thoroughly. Al-Mg alloy must be covered under the melting agent. Furnace, tools to clean, there shall be no oxide, and should be preheated, paint coating should be used after drying. The design of the gating systemmust have a steady flow, buffer, skimming ability. The tilt gating system, so that the liquid flow stability, does not produce two oxidation. The selection of coating adhesion strength stronger, pouring process does not produce spallingand formed into casting slag.

4, heat cracking

To prevent hot cracking measures: the actual gating systemshould prevent local overheating, reducing internal stress.Mould and core inclination must ensure that in more than 2 °, pouring a solidified by the can core mold, when necessary use sand core to replace the metal core. Control of coating thickness, make casting parts cooling speed.According to the thickness of the choice of mold temperatureappropriate. Microstructure refinement of alloy, improving the heat crack ability. Improvement of casting structure,eliminating angle and wall thickness of mutation, reduce thehot cracking tendency.

5, loosening

Prevention of osteoporosis: reasonable measures of riser setting, ensure the solidification, and the feeding capacity. Lower the metal mould appropriate temperature.Control of coating thickness, thick wall thinning. Adjust the metal type of each part of the cooling speed, a chilling ability greatly make the castings with thick section.Reduced metal pouring temperature.

The use of high frequency furnace process in the problem, can be avoided, mostly because details of the deal caused by improper. Hope that the majority of customers in the use of high frequency furnace in strict accordance with the law in the use of the use of high frequencyfurnace.

This can increase the maximum workpiece quality and high frequency furnace service life. Henan Chao Feng wish the new and old customersBusiness Flourishes