Flange

Process Description of Austenitic Stainless Steel Forgings

Austenitic stainless steel forgings are more difficult to forge than ordinary steel, but there are few surface defects. Most austenitic stainless steel forgings can be forged over a wide temperature range above 927°C. Since austenitic stainless steel forgings have no phase transformation in the high temperature range, the forging temperature is higher than that of martensitic stainless steel, but high chromium or low carbon stainless steel does not have the above properties, because when the temperature is higher than 1093 ℃, high chromium or low carbon stainless steel will produce different contents of ferrite according to the composition, which is harmful to forgeability.

What is the cause of harming the quality of stainless steel forgings

The good quality of raw materials is a prerequisite for ensuring the quality of forgings. If there are shortcomings in raw materials, it may affect the forming process of forgings and the quality of forgings. If the chemical molecules of the raw materials exceed the required range or the content of residue elements is too high, it will cause relatively great harm to the forming and quality of forgings. For example, S, B, Cu, Sn and other classics are easy to produce low melting point phases, making stainless steel forgings prone to thermal brittleness.

The difference between wear-resistant alloy steel and carbon steel

Wear-resistant alloy steel means that in addition to steel containing silicon and manganese as alloying or deoxidizing elements, it also contains other alloying elements (such as chromium, nickel, molybdenum, vanadium, titanium, copper, tungsten, aluminum, cobalt, niobium, zirconium and other elements) and some non-metallic elements (such as boron, nitrogen, etc.), depending on the content of alloying elements in steel.

Preparation of stainless steel forgings

The forming method of flange forgings is based on the diversity of forging geometry and the machining accuracy and symmetry of forgings. At the same time, considering that the forming problem of the transmission gear forging is part of the convex blocks of the upper and lower ports, the deformation degree is above 809/6, in order to ensure the forming of each convex block, it is determined to select the closed test extrusion form for warm extrusion. Mold guide selection of positioning pins, guide pillar diagonal form setting, in order to avoid the displacement of the male and female die caused by the shape tolerance of the upper and lower bumps beyond the allowable range.

Discussion on heat treatment of wear-resistant alloy steel

Wear-resistant alloy steel mainly by adding Cr, Mo, V, Ti, rare earth and other elements to the traditional composition of high manganese steel to improve the performance, of which Cr is particularly widely used. In the process of work hardening of high manganese steel, dynamic variational aging, that is, C- Mn atomic pairs, is formed, which has the clustering effect of expanding the C- Mn ordered atomic pairs in high manganese steel. In this paper, the changes in the organization, structure, resistance and wear resistance of wear-resistant alloy steel and ordinary high manganese steel with different tempering temperatures are studied. The results show that the wear-resistant alloy steel is better than ordinary high manganese steel under the condition of relatively low carbon content. Moreover, according to the tempering temperature, the structure of the alloy high manganese steel is different, and the wear resistance is also different.

Detailed explanation of special wear-resistant alloy steel surface treatment technology

In the process of surface treatment of special wear-resistant alloy steel, the physical and chemical characteristics of the surface material of the product are greatly changed by the interaction of external input energy, alloy elements or materials with the surface of the product. The microscopic nature of surface treatment is the controllable physical and chemical changes on the surface of the material, which has excellent properties different from gases.