Quenching and tempering of 20CrMnTi alloy lifting ring with mesh belt furnace

Quenching and tempering of 20CrMnTi alloy lifting ring with mesh belt furnace

Product Name: D-type lifting ring-15t

Material: 20CrMnTi alloy

Requirements: quenching and tempering 310-340hb

Heat treatment equipment: jh802 + jh806 mesh belt furnace production line

Process: 30ml / min atmosphere protection for each route of methanol, zone 1 800, zone 2 850, zone 3 860, zone 4 870, zone 5 880, zone 6 880 ℃, speed about 120 minutes (from furnace feeding to oil feeding time), 60-80 ℃ oil cooling, start stirring, after cleaning, zone 1 300, zone 2 400, zone 3 470, zone 4 470 ℃, tempering for 120 minutes.

1. After the empty furnace is heated to 800 ℃, turn on the methanol flowmeter, which has 5 channels in total and is stably controlled at 30ml / min

2. Place the lifting rings neatly on the mesh belt and heat them in the furnace

3. Lift up the oil tank mesh belt after quenching

4. Measure the hardness after quenching

5. Enter the tempering mesh belt furnace for tempering after cleaning

6. Tempering and discharging air cooling

7. Measure the hardness 310-340hb (33.5-36.9hrc) after tempering