Cara nyegah deformasi saka tungku listrik eksperimental heat treatment and quenching

1. Strictly control the quality of raw materials, and strictly control the defects such as loose segregation in steel, band-like, net-like and carbide liquefaction, and inclusions.

2. Improve the size and distribution of carbides in the annealed structure.

3. Pre-shaping and stress relief annealing before quenching. The residual deformation of turning and the residual stress of turning have a greater influence on the quenching deformation. For precision products and thin-walled, complex-shaped parts, they should be reshaped in advance and subjected to a stress relief annealing at 450-670℃.

4. Supaya suhu panas banget. Ing kasus entuk struktur lan atose sing cocog, ora kudu ditekanake kanggo nambah konsentrasi paduan lan nambah suhu quenching. Kanggo struktur asli sing luwih alus (kayata dinormalisasi utawa dipateni sekunder), suhu quenching kudu diturunake yen cocog.

5. Pemanasan quenching kudu alon lan seragam. Mulane, bagean kasebut kudu diselehake kanthi rata ing zona isothermal ing tungku, lan ora cedhak karo awak sing dadi panas. Warping lan extrusion kudu nyingkiri; yen perlu, bisa preheated ing 400 ~ 500 ℃ sadurunge dadi panas kanggo supaya overheating lan ora rata dadi panas.

6. Avoid excessive cooling. For this reason, the cooling medium should be selected reasonably and the temperature of the control medium should be controlled. In the case of not lower than the critical cooling rate, try to slow down the cooling, especially when it is lower than 450°C, it should be cooled slowly. For easily deformable parts, such as thin-walled ferrules with large diameters. Can choose to use graded oil quenching or nitrate austempering.

7. Usaha kanggo cooling seragam. Nalika quenching lan cooling, perlu kanggo nimbang cooling seragam kabeh bagean saka bagean. Gunakake udara sing dikompres utawa pengadukan mekanik lan langkah-langkah pendinginan liyane. Nalika milih mesin hardening Rotary, kacepetan rotasi beda kudu digunakake miturut diameteripun ferrule.

8. Avoid mechanical collision of parts. Avoid collisions during transportation, furnace loading, heating, and cooling operations, especially in the red hot state. Such as: heating in the experimental electric furnace, be careful of the deformation of the parts when using the fixture.