Welcome to Dingxiang County Rongxin Machinery Processing Co., Ltd. official website
Pre-treatment of stainless steel forgings
Release time:
2021-11-12
Author:
Source:
Abstract
1. The Importance of Preprocessing
Preprocessing is a crucial process before the surface of stainless steel forgings enters the surface treatment process (including pickling passivation, electropolishing and electrochemical polishing, electroplating, passivation, blackening, coloring, chemical processing, etc.). During the processing of stainless steel forgings, the surface may be contaminated with oil stains, burrs, uneven surfaces, and metal oxides. Therefore, before surface treatment, it is essential to remove oil stains, burrs, uneven surfaces, and metal oxides to ensure satisfactory results in subsequent processing.
2. Waste to be Removed During Processing
The waste to be removed from the surface of stainless steel during preprocessing can be divided into two categories: organic compounds and inorganic compounds.
(1) Organic waste: This oil stain mainly comes from lubricating oil, cutting fluid, quenching fluid, polishing paste and polishing wax, and fingerprints used in the process of stainless steel parts processing.
(2) Inorganic waste: Includes soil, dust particles, metal oxides generated during heat treatment, etc.
What should be paid attention to in the production process of flange forgings?
The forming method of flange forgings is determined based on the diversity of the forging geometry and the requirements for processing accuracy and symmetry. At the same time, considering that the forming problem of this gear forging is the convex block part at the upper and lower ports, and its deformation degree reaches more than 809/6, in order to ensure the forming of each convex block, it is determined to use the closed isostatic pressing method for warm forging. The mold guidance adopts the positioning pin and guide column diagonal setting method to avoid the shape tolerance of the upper and lower convex blocks exceeding the allowable range due to the displacement of the convex and concave molds.
In addition, better lubrication is needed to further ensure successful demolding, reduce mold damage, and ensure the feasibility and reliability of the process. From the analysis of the forging drawing, the selection of the parting surface is to ensure the rationality and processing accuracy of the gear forging, as well as the stable operation of the mold. The upper port with a diameter of 42mm can be used as the parting surface, that is, the three convex blocks at the upper port are isostatically pressed in the mold base, and the cylindrical stepped body and the four convex blocks at the lower port are formed in the cavity.
The materials used for forging flange forgings are usually various carbon steels and carbon steels, followed by aluminum, magnesium, copper, titanium, and aluminum alloys. The original states of the raw materials include round bars, castings, metal powders, and shape memory alloys. The ratio of the cross-sectional area before deformation to the cross-sectional area after deformation of the metal is called the forging ratio. Accurately selecting the forging ratio, reasonable heating temperature and insulation time, reasonable initial forging temperature and final forging temperature, and reasonable deformation amount and deformation rate are of great significance to improving product quality and controlling costs.
Recommend Reading
What are the performance requirements for non-metallic sealing materials in precision forging?
2025-03-13
The blanking process of precision forged sheet metal
2025-03-13
Overview and Application of Split Die Forging in Special Forging
2025-03-13
Mobile:0086-18235083240
Telephone:+86-350-6034099
E-mail:info@rxforgings.com
Website:www.sxrxforging.com
Address: Shenshan Industrial Park, Dingxiang County, Xinzhou City, Shanxi Province
We will contact you within one working day. Please pay attention to your email