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