Effect of Operating Conditions on Inclusion of Die Steel during Electroslag Remelting
Effect of Operating Conditions on Inclusion of Die Steel during Electroslag Remelting
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DOI：
10.2355/isijinternational.isijint-2017-429
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发表时间：
2018-01
影响因子：
1.8
通讯作者：
Gang Du;Jing Li;Zhong-Bing Wang
中科院分区：
文献类型：
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作者：
Gang Du;Jing Li;Zhong-Bing Wang
对生产高质量钢的需求不断增加，导致对钢的洁净度，包括氧含量和夹杂物的严格控制，近年来引起了极大的关注。1 -3）钢中的非金属夹杂物往往是疲劳裂纹的萌生源，严重影响钢的使用寿命，特别是大尺寸夹杂物的存在对疲劳寿命和使用性能极为不利，尽管它们的数量有限。4 -6）电渣重熔（ESR）是控制钢的洁净度和凝固组织的最重要和最有效的方法之一。7，8）电渣重熔过程是通过交流（AC）或直流（DC）电流从电极到铸锭流过高电阻率渣池而引起的，从而在电极和炉渣中产生焦耳热。由于集肤效应导致电流密度集中在电极周边，电极周边的焦耳热显著大于中心; 9，10）此外，焦耳热的最大值出现在电极尖端附近的电极/渣界面区域。操作条件对电渣重熔模具钢夹杂物的影响
The increasing demand for producing high-quality steel has led to the stringent control of steel cleanliness, including oxygen content and inclusions, which has been attracting great attention in recent years.1–3) Non-metallic inclusions in steel are often the initiation source of fatigue crack which seriously affect the service life of steel, particularly the existence of large-sized inclusions are extremely detrimental to fatigue life and service performance despite their limited numbers.4–6) Electroslag remelting (ESR) is one of the most important and effective ways to control the cleanliness and solidification structure of steel.7,8) ESR process is caused by means of an alternating current (AC) or a direct current (DC) which flows through the highresistivity slag pool from the electrode to the ingot, thus generating Joule heating in the electrode and slag. The Joule heating at the electrode periphery is significantly greater than that in the center, owing to the higher current density concentrated at the electrode periphery induced by the skin effect;9,10) in addition, the maximum of Joule heating is at the electrode/slag interface region around the electrode tip, Effect of Operating Conditions on Inclusion of Die Steel during Electroslag Remelting