لوحة ارتداء CCO
CCO Wear Plate is called a weld overlay plate because its wear-resistant surface is created by welding a hard alloy layer onto a steel base plate. This manufacturing process, known as hardfacing, forms a strong metallurgical bond and produces a high-chromium carbide surface layer.
- وصف
لوحة ارتداء CCO (لوحة ارتداء تراكب كربيد الكروم) is a highly wear-resistant steel product widely used in mining, أسمنت, محطات توليد الطاقة, والمعدات الصناعية الثقيلة. It is commonly called a “weld overlay plate” or “hardfacing wear plate” because its surface is formed by a welding deposition process rather than rolling or casting.
The name directly reflects its manufacturing method and structure.
Why It Is Called a Weld Overlay Plate
The term “weld overlay” comes from the way the wear-resistant layer is created.
Unlike traditional steel plates that are produced by rolling, CCO wear plate is made by:
- Depositing a hard alloy layer onto a steel base
- Using welding technology to fuse the materials
- Creating a metallurgical bond between layers
This “overlay” layer is what gives the plate its extreme wear resistance.
So, it is called a weld overlay plate because the surface is literally “welded on” rather than formed as a single solid piece.
Manufacturing Process of CCO Wear Plate
The production of CCO wear plate involves several controlled steps to ensure strong bonding and high wear resistance.
1. إعداد لوحة القاعدة
A mild steel or low-carbon steel plate is selected as the base material.
Functions of base plate:
- يوفر القوة الهيكلية
- Absorbs impact loads
- Supports machining and installation
The surface is cleaned to remove oil, الصدأ, and impurities before welding.
2. عملية اللحام الصلبة
The core step is the deposition of a wear-resistant alloy layer.
وتشمل طرق اللحام الشائعة:
- اللحام بالقوس المفتوح
- اللحام بالقوس المغمور
- اللحام بالقوس ذو القلب المتدفق
During this process, a high-chromium alloy wire or powder is melted and deposited onto the base plate.
3. Formation of Carbide Overlay Layer
As the molten alloy cools, it forms a hard microstructure:
- Chromium carbide particles (extremely hard phase)
- Iron-based metallic matrix
- ترابط معدني قوي مع الفولاذ الأساسي
This structure provides excellent wear resistance.
4. Multi-Layer Deposition (if required)
لمقاومة التآكل أعلى, multiple welding layers may be applied:
- First layer: bonding and transition layer
- Second layer: main wear-resistant layer
- Additional layers: enhanced hardness and thickness
5. التبريد والتشطيب
بعد اللحام, the plate is cooled and processed:
- Stress relief and stabilization
- فحص السطح بحثًا عن الشقوق أو العيوب
- الاستقامة والتسوية
- قطع إلى الأحجام المطلوبة
Key Features of the Manufacturing Process
The weld overlay process gives CCO wear plate several advantages:
- الترابط المعدني القوي بين الطبقات
- Extremely hard wear-resistant surface
- Tough and impact-resistant base support
- Adjustable thickness of overlay layer
- Suitable for extreme abrasion environments
