PREHEAT中文(简体)翻译：剑桥词典 - Cambridge Dictionary
网页verb [ T ] uk / ˌpriːˈhiːt / us / ˌpriːˈhiːt / Add to word list. to heat an oven to a particular temperature before putting food in it. 预热（炉灶） Preheat the oven to 180°C. 把烤箱预热至180 摄氏度。 a preheated oven 预热过的烤箱. (preheat在剑桥英语-中文（简体）词典的翻译 © Cambridge University Press) preheat的 例句. This may lead to preheating of the target. 来自 Cambridge English Corpus.
Preheating in Welding: Basics to everything you need to know
网页2021年6月4日 · Preheating in Welding involves heating the base metal surrounding the weld joint, to a specific pre-determined minimum temperature, called the preheat temperature, prior to welding or performing tack welds. Preheating application can be either just before the welding or continuous preheat maintenance till the welding is completed.
Preheat in Welding: What Is It and When Should You Use It?
网页2020年5月28日 · Preheating involves heating the area around the weld joint or the entire part to a specified temperature before welding. This reduces the cooling rate of the weld and drives out moisture. This in turn helps prevent …
What is Preheat - Lincoln Electric
网页Preheating involves heating the base metal, either in its entirety or just the region surrounding the joint, to a specific desired temperature, called the preheat temperature, prior to welding.
Here’s Why Preheating Is Done Before Welding—And Why It …
网页2018年5月29日 · No one enjoys a successful, lifelong welding career without a few blunders. Even so, preheating can be your saving grace in many cases. The short story about preheating is, it’s an extra step in the welding process that can help with quality assurance.
Preheating and Post Weld Heat Treatments - NORTH AMERICA …
网页Preheat, as defined within the AWS Standard Welding Terms and Definition, is “the heat applied to the base metal or substrate to attain and maintain preheat temperature.” The preheat temperature is defined by the same document as “the temperature of the base metal in the volume surrounding the point of welding immediately before welding is started.
Why is preheat used when arc welding steel, and how is it …
网页Preheating is the process applied to raise the temperature of the parent steel before welding. It is used for the following main reasons: The slower cooling rate encourages hydrogen diffusion from the weld area by extending the time period over which it is at elevated temperature (particularly the time at temperatures above approximately 100°C ...
Preheating – How, When and Why | Welding & NDT - Welding …
网页Preheating is carried out for the following reasons; It slows down the cooling rate of weld metal, HAZ (heat affected zone) and adjacent base metals, which yields a good microstructure to the metal, prevents martensite formation at microstructural level and prevents from cracking of the weld metal and HAZ.
Preheating In Welding - Steel, Stainless, And Aluminum
网页2023年5月17日 · Metal type, thickness, current metal temperature, ambient temperature, and welding process determine the required preheat temperature. In this article, you will learn how to preheat different metal types and why, determine the metal temperature, and other vital elements of the preheating process.
The Ultimate Guide to Welding Preheating Techniques
网页2023年7月25日 · Preheating is the process of heating the workpiece to be welded to a temperature higher than the ambient temperature, either before or during welding. Preheating is a mandatory requirement in welding, and specific preheating temperature ranges are outlined in pre-welding and post-welding specifications.