Machine tool castings of different quenching and annealing
Release time：04-07
Source：
View volume： 73
Quenching machine tool castings refers to the quenching machine tool lathe bed guide rail, the most commonly used cooling medium is salt water, oil and water. Brine quenching workpiece, easy to get high hardness and smooth surface, it is not easy to produce soft point of quenching is not hard, but it is easy to make the workpiece deformation is serious, even cracking. Oil as quenching medium is only applicable to the stability of the supercooled austenite bigger some alloy or carbon steel workpiece quenching of small sizes.
Is the whole casting machine casting annealing kiln for high temperature, in accordance with the requirements of the fire in different temperature and time; Common process are: recrystallization annealing, the stress relieving, spheroidizing annealing and full annealing. The purpose of annealing is primarily to reduce the hardness of metal materials, improve the plasticity, processing and machining and pressure, and reduce the residual stress, improve the organization and composition of the homogenization, or for the heat treatment after ready for the organization, etc.
Completely annealing and isothermal annealing, full annealing and weighing annealing crystallization, commonly referred to as "for annealing, is mainly used for the annealing of eutectoid composition of carbon steel and alloy steel casting, forging and hot rolled profiles, sometimes used for welding structure. Generally used as a final heat treatment, not heavy piece or as a preliminary heat treatment in some artifacts.
Machine tool castings tempering furnace
Spheroidizing annealing, spheroidizing annealing is mainly used for hypereutectoid steel and alloy tool steel (such as manufacturing cutters, measuring tool, mold used steel grade). The main purpose is to reduce the hardness and improve cutting workability, and to prepare for after quenching.
Go stress relieving, annealing is also called low temperature annealing (or high temperature tempering), the annealing is mainly used to eliminate the casting, forging, welding parts, rolling, the residual stress of cold-drawn pieces, etc. If these stress will not be eliminated, will cause the steel after a certain period of time, or during subsequent machining deformation or cracks. To stress relieving of the more common is grey iron casting machine tool, machine tool bed casting products as a kind of large castings must be after heat treatment to improve the use performance of itself, improve the quality of cast iron castings. Can't change the graphite shape and eliminate the harmful effect of flake graphite, only used to eliminate casting stress of castings, stable size. Eliminate chilling organizations to reduce the hardness to improve the processing performance, increase the surface hardness and wear resistance.
Heat treatment of castings is one of the important technology in mechanical manufacturing, compared with other processing technology, heat treatment generally does not change the shape of the workpiece and the chemical composition of the whole, but by changing the workpiece internal microscopic metallographic organization, or change the surface chemical composition, or improve the use performance of workpiece.
The influence factors of machine tool castings of high strength cast iron is what
Traditional grey cast iron smelting control direction is low carbon high strength cast iron (C: 2.7 ~ 3.0, Si: 2.0 ~ 2.3, Mn: 0.9 ~ 1.3), although this material can meet the requirements of material m
What are the factors affect the casting casting shrinkage rate
In casting solidification process, its each part size is typically narrowed, casting size smaller percentage, called casting line shrinkage or casting shrinkage rate. Manufacture molds (including core
The development prospects of machine tool industry opening to the outside
Since reform and opening up, China's machine tool industry through the implementation of the "introduction" and "going out" strategy, make the technical level, international trade is growing fast. At
Official WeChat
Mobile phone
SAF Coolest v1.3.1.2 设置面板 MVRSD-ZQFJ-YXAVE-ZZX
无数据提示
Sorry, the current column is being updated, please look forward to it!
You can view other columns or returnHome Page