Alloy Steel Oil Ring Wire for Nitrided Wear-Resistant Side Rails
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Solution Overview
Problem
Stainless steel side rails for oil rings are costly and have poor workability, while carbon or low-alloy steel side rails are unsuitable for nitriding and require costly plating or coating, which involves heating and softening.
Innovation Solution
An oil ring wire made of alloy steel with specific compositions (0.50 to 0.65% C, 1.60 to 2.30% Si, 0.60 to 1.10% Mn, 0.75 to 1.15% Cr, 0.18 to 0.45% Ni, 0.05 to 0.15% V, 0.15% Cu) is produced through cold drawing, patenting, rolling, quenching, and tempering, enabling nitriding without plating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stainless steel is used for side rail material, then wear resistance is improved, but material cost increases and workability deteriorates
Solution Approach 1:
The invention changes the material parameters by specifying precise compositional ranges (C: 0.50-0.65%, Si: 1.60-2.30%, Mn: 0.60-1.10%, Cr: 0.75-1.15%, Ni: 0.18-0.45%, V: 0.05-0.15%, Cu: ≤0.15%) to achieve the desired balance between wear resistance and workability, replacing stainless steel with a customized alloy steel composition
Solution Approach 2:
The invention uses a composite alloy steel material containing multiple elements (C, Si, Mn, Cr, Ni, V, Cu) in specific proportions to combine the benefits of wear resistance from stainless steel with the workability of carbon steel, creating a new material system that resolves the contradiction
2Ease of manufacture
If carbon steel or low-alloy steel is used for side rail material, then workability is improved, but nitriding suitability deteriorates
Solution Approach 1:
The invention modifies the material parameters by adding specific alloying elements (Cr: 0.75-1.15%, Ni: 0.18-0.45%, V: 0.05-0.15%) to carbon steel to enable nitriding while maintaining workability, transforming the material properties to satisfy both requirements
3Reliability
If plating is applied to carbon steel side rail, then wear resistance is improved, but production cost increases
Solution Approach 1:
The invention extracts and eliminates the plating process from the manufacturing sequence by incorporating nitriding capability directly into the base alloy steel material, removing the need for additional plating operations and associated costs
Solution Approach 2:
The invention merges the functions of the base material and the protective coating into a single nitrided alloy steel component, where the nitriding layer forms integrally with the base material, eliminating separate plating operations
4Reliability
If coating is applied to carbon steel side rail, then wear resistance is improved, but production complexity increases due to heating step
Solution Approach 1:
The invention extracts and eliminates the separate coating process and its associated heating equipment from the manufacturing system by enabling direct nitriding of the alloy steel, simplifying the production line
Solution Approach 2:
The alloy steel material performs self-service by forming its own protective nitrided layer through nitriding treatment, eliminating the need for external coating applications and complex heating processes
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 alloy steel oil ring wire provides excellent wear resistance and workability, allowing for low-cost production of high-hardness side rails suitable for nitriding, reducing material and processing costs.
Implementation Method 1
The oil ring wire is suitable for nitriding
Implementation Method 2
subjecting the deformed wire to quenching and tempering
Data Source
AI summary
An oil ring wire (2) containing an alloy steel as a material. The alloy steel contains: 0.50 to 0.65% by mass C; 1.60 to 2.30% by mass Si; 0.60 to 1.10% by mass Mn; 0.75 to 1.15% by mass Cr; 0.18 to 0.45% by mass Ni; 0.05 to 0.15% by mass V; and 0.15% by mass or less Cu. In the oil ring wire 2, an area percentage of a carbide is 1.00% or less. Also disclosed is a method of producing the oil ring wire.