Armored Component Coating Adhesion via Abrasive Blasting
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Solution Overview
Problem
Existing armor components for motor vehicles are heavy due to their thickness, which is necessary for bullet resistance, and existing coating methods fail to ensure durable adhesion under multi-hit bombardment, leading to potential flaking off and reduced protection.
Innovation Solution
A method involving blasting treatment of armor steel surfaces with a specific hardness and roughness, followed by application of a softer material coating, such as aluminum or zinc alloys, using thermal spraying techniques to create a durable and multi-hit-resistant armor component with varying thickness and geometry for optimal adhesion and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the thickness of the steel sheet is increased to improve bullet resistance, then the protective performance is improved, but the weight of the component increases
Solution Approach 1:
The patent applies a composite structure consisting of a steel sheet with a coating layer. The steel sheet provides the primary bullet resistance while the coating layer (softer than the steel) enhances surface protection and allows for reduced steel thickness. This composite approach maintains protective performance while reducing overall weight compared to a solid steel component of equivalent thickness.
2Weight of moving object
If a coating is applied to reduce steel sheet thickness and weight, then the weight of the component is reduced, but the coating may flake off or come loose under multi-hit bombardment
Solution Approach 1:
The patent specifies precise parameter ranges for the steel sheet hardness (380-760 HV) and coating hardness (10-230 HV), ensuring the coating is softer than the steel sheet. This parameter control prevents coating delamination under multi-hit bombardment by creating a favorable hardness gradient that maintains coating integrity while reducing overall component weight.
3Strength
If the steel sheet hardness is increased to improve bullet resistance, then the protective performance is improved, but the adhesion of the coating to the steel sheet deteriorates
Solution Approach 1:
The patent establishes specific hardness parameter ranges: steel sheet hardness of 380-760 HV and coating hardness of 10-230 HV. By controlling these parameters to maintain the coating softer than the steel sheet, the invention achieves optimal adhesion while preserving bullet resistance. This parameter optimization resolves the contradiction between high steel hardness for protection and sufficient coating adhesion.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method results in a lightweight, multi-hit-resistant armor component with maintained bullet resistance, as the coating adheres well to the surface without flaking off, even under repeated impacts, while allowing for precise geometric adaptation for vehicle integration.
Implementation Method 1
blasting treatment of at least one area of a surface of the armor element, a surface roughness Ra of 3 to 10 micrometers is produced during the blasting treatment
Implementation Method 2
applying a coating to the blast-treated surface of the armor element, the coating consisting of a material that is softer than the armor steel
Data Source
AI summary
The invention relates to a method for manufacturing an armor component for motor vehicles. First, an armor element made of armor steel is provided. Subsequently, at least one area of the surface of the armor element is treated using abrasive blasting. Finally, a coating is applied to the abrasive-treated surface of the armor element, the coating being made of a material softer than the armor steel.