Suggestion of heat resistant steel to users of heat resistant steel castings

For many years engaged in heat-resistant steel, and combined with the region, the use of environment, and its use of experience, to improve the service life of heat-resistant steel castings, reduce the cost of customers, increase the service life of heat-resistant steel products, I heat-resistant steel manufacturers to make special instructions for your reference!

1. The heat-resistant steel manufacturer explained that the fittings of carburizing furnace should be tempered at a high temperature before use. The temperature should be controlled above 950 ℃, kept for 1-2 hours, and cooled with the furnace. The main purpose is to eliminate the internal stress in the casting process.

2. The bottom plates of box type furnace, trolley resistance furnace and heat-resistant steel furnace shall be tempered at a high temperature before use. The temperature shall be controlled above 950 ℃ for 1-2 hours and cooled with the furnace. The main purpose is to eliminate the internal stress in the casting process. During the use of the furnace plate, the workpieces shall be placed evenly and the work shall not be piled up in a local position, This will lead to uneven heat dissipation of the furnace plate in the process of heating up, which is easy to cause deformation and cracking of the furnace plate, and prevent oxide scale from causing short circuit of resistance wire to puncture the furnace bottom plate. If you have special process requirements, you can contact Taizhou Dahua heat resistant steel company, and the company can formulate perfect process according to the requirements of customers and the actual situation of customers.

3. Spreader, basket

Heat resistant steel manufacturers remind that zg40gr25ni20 welding rod should be selected when using spreader and material basket. This brand has good creep property during quenching and will not cause serious deformation and cracking of spreader and material basket. High temperature tempering should be carried out before use. The temperature should be controlled above 950 ℃ and kept for 1-2 hours. The main purpose is to eliminate internal stress during casting, Increase the service life of the product.

When all kinds of material baskets are used, the workpieces should be placed evenly, and the weight should not exceed the designed load capacity of the material baskets. When lifting the material baskets, it should be lifted and put down gently. After 90 days of use, the carburizing furnace tank should be lifted out to clean the oxide scale in the furnace tank.

4. Zg40gr25ni20 welding rod can be used to weld the above heat-resistant steel castings if local cracks are found during use.