Causes and prevention methods of machining streaks on the surface of stainless steel castings

If you can pay attention, you can find that there will be some processing stripes on the surface of the stainless steel casting just after it is cast. What are these stripes? Is there any way to prevent similar phenomena on the surface of stainless steel castings and further improve the quality of castings?

The reason why there are machining streaks on the surface of stainless steel castings may be that the two metal flows do not fill the cavity during the casting process, and then leave traces. According to past experience, such shortcomings are easy to occur when the temperature of the casting mold is low.

In addition, the addition rate of stainless steel castings is too fast, and it is relatively easy to form such stripes; or if the amount of paint is too much, stripes will also be produced. In short, the existence of Truck Spare Parts Carbon Steel Precision Investment Casting Parts stripes means that the surface quality of stainless steel castings is not good, so it still needs to be prevented by corresponding measures.

In order to improve the quality of stainless steel castings, it is not only necessary to choose the correct casting method, but also pay attention to the selection of materials; secondly, it is necessary to combine the experience of ordinary work, according to the cross-sectional area and position, shape and size of the gate and other parameters to set The movement rate, movement direction and flow state of the molten metal satisfy the forming quality of the stainless steel casting.

In general, the thin inner gate has a high flow rate of molten metal, which is beneficial for adding thin walls and a variety of parts, making the appearance and shape of the casting clear, and requiring an appropriate scheduling rate. At the same time, it is necessary to properly adjust the mold temperature, increase the overflow groove, etc., so as to prevent streaks from occurring on the surface of stainless steel castings.