Alloy steel shot is generally widely used in the casting industry. When used on suitable equipment, it is more durable and is an ideal abrasive. By quenching and heating the 1 #, 2 #, and 3 # alloy steel balls separately, the quenching process is as follows:
1. Quenching heating temperature
(800 ± 20) ℃. Heat the steel shot to the predetermined temperature in the quenching furnace and hold it for one hour to homogenize the austenite.
2. Quenching medium
Potassium nitrate and sodium nitrite, 55% KNO3+45% NaNO2.
3. Heating of quenching medium
Design and manufacture a medium heating device, including a furnace and a quenching tank, to heat the medium to 300-350 ℃ at a constant temperature.
4. Isothermal quenching process
Put the heated alloy steel shot into the quenching medium, keep it warm for 20 minutes, and then take it out for air cooling. The insertion process should be fast and smooth to prevent the quenching medium from splashing and scalding people. Do not put too many alloy steel balls at once to prevent the medium from heating up. Temperature should be monitored during the insulation process.
It is commonly used for stainless steel parts and aluminum castings because it does not contaminate the castings after shot blasting, and alloy steel balls are more wear-resistant. And the reinforcement of blades, cylinders, and connecting rods used in aviation engines and diesel engines with high hardness.
Editor: Lena