The gloss of JIS G3461 STB 510 seamless steel pipe after annealing determines the quality of the product. There are also many influencing factors. Here are five key factors:
1. The annealing temperature of JIS G3461 STB 510 seamless steel pipe should be the required temperature. The heat treatment process of steel generally adopts heat treatment and tempering heat treatment process, and the temperature range is 1040~1120℃.
2. JIS G3461 STB 510 seamless steel pipe annealing atmosphere. Generally, pure hydrogen is used as the annealing atmosphere, and the purity of the atmosphere is above 99.99%, but it must not contain too much Co2 and water vapor.
3. The airtightness of the furnace wall. JIS G3461 STB 510 seamless steel pipe furnace should be closed and blocked from external gas; when radon is used as the protective gas, only one exhaust pipe is open. JIS G3461 STB 510 seamless steel pipe inspection method can be wiped with soap liquid on the gap of each joint of the annealing furnace to see if it is leaking.
4. Working pressure of protective gas. In order to better avoid micro leakage in JIS G3461 STB 510 seamless steel pipe, the protective gas in the furnace should maintain a certain positive pressure. If it is a radon protective gas, it is generally specified above 20kBar.
5. Water vapor in the furnace. On the one hand, check whether the raw materials of the furnace wall are dry. When installing the furnace for the first time, the raw materials of the furnace wall must be air-dried; on the other hand, whether the JIS G3461 STB 510 seamless steel pipe entering the furnace have too many water marks, especially if there are holes on the pipes. If you have to, don't let water seep in, otherwise it will ruin the atmosphere of the stove.
