Aspék naon anu kedah diperhatoskeun nalika ngaleungitkeun tungku pemanasan induksi beusi tuang?

Among all kinds of cast iron, the induction heating furnace quenching of gray cast iron is the most difficult. The quenching of gray cast iron induction heating furnace is similar to steel, and the quenching equipment used is also similar. The following differences should be noted:

Waktu pemanasan leuwih panjang batan bagian baja. Sacara umum, éta kedah langkung ti sababaraha detik sareng kedah disimpen pikeun sababaraha waktos supados struktur anu teu larut tiasa leyur kana austenit. Upami laju pemanasan gancang teuing, éta bakal nyababkeun setrés termal anu kaleuleuwihan sareng retakan.

Suhu pemanasan teu kedah luhur teuing, wates luhur nyaéta 950 ℃, umumna 900 ~ 930 ℃, sasmita béda boga suhu optimal, nalika suhu pemanasan ngahontal 950 ℃, fosfor eutectic bakal muncul dina beungeut bagian, sarta aya. bakal kasar ditahan austenite.

3) In order to make the temperature slowly transition from the surface to the core, it is best not to quench immediately after heating, and pre-cooling for 0.5 ~ 2s is best.

4) Induction heating furnace quenching of iron castings generally uses polymer aqueous solution or oil as the quenching cooling medium, and some parts such as the cylinder liner are directly quenched with water as the quenching cooling medium, and the valve seat of the cylinder body is quenched by self-cooling.

5) Saatos castings beusi abu anu quenched dina tungku pemanasan induksi, tempering hawa low kudu dilaksanakeun dina urutan pikeun ngaleungitkeun stress. Contona, liner silinder kudu tempered dina frékuénsi kakuatan

Matriks beusi tuang férit nyaéta ferrite sareng karbon grafit. Dina raraga ngaleyurkeun karbon dina austenite, perlu pikeun ngaronjatkeun suhu pemanasan (1050 ℃) jeung manjangkeun waktu pemanasan (nepi ka 1min atawa leuwih), ku kituna nyieun sabagian leutik karbon grafit ieu leyur dina austenite, sarta permukaan luhur. karasa bisa didapet sanggeus quenching.