Vanadium Silicon Carbide Coating for Low-Friction Metal Molds

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Solution Overview

Problem

Existing vanadium-based films used on metal molds for press working and forging have high friction coefficients, necessitating the development of a film with a lower friction coefficient to enable semi-dry or dry processing without lubricating oil.

Innovation Solution

A vanadium silicon carbide film with a specific elemental concentration range of vanadium, silicon, and carbon, formed using a plasma chemical vapor deposition method, to achieve a low friction coefficient.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a vanadium silicocarbonitride film is formed on the metal mold surface using plasma chemical vapor deposition, then abrasion resistance is improved, but friction coefficient remains high

Engineering Contradiction:

Improveabrasion resistanceVSAvoidfriction coefficient

Core Design Contradiction:

StrengthVSForce

Solution Approach 1:

The invention changes the compositional parameters of the film by eliminating nitrogen and adjusting the ratios of vanadium, silicon, and carbon elements. The film contains vanadium (5-30 at%), silicon (5-30 at%), and carbon (40-70 at%), with their total concentration being 90 at% or more. This parameter optimization reduces the friction coefficient while preserving abrasion resistance

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates a composite film structure combining vanadium, silicon, and carbon elements in specific proportions. This composite material approach allows the film to simultaneously achieve low friction coefficient (0.3 or less) and high abrasion resistance, resolving the contradiction between the two properties

Inventive Principle:

Principle #40Composite materials

2Force

If lubricating oil is used in press working and forging, then friction is reduced, but environmental protection and semi-dry/dry processing requirements are compromised

Engineering Contradiction:

Improvefriction reductionVSAvoidenvironmental protection

Core Design Contradiction:

ForceVSObject-affected harmful factors

Solution Approach 1:

The film provides self-lubrication properties through its inherent low friction coefficient (0.3 or less), eliminating the need for external lubricating oil. The vanadium silicon carbide film structure itself serves as the lubrication mechanism, enabling semi-dry or dry processing conditions while reducing environmental harm from oil usage

Inventive Principle:

Principle #25Self-service

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 vanadium silicon carbide film exhibits a low friction coefficient, enhancing the lubricity and durability of metal molds for press working and forging.

Implementation Method 1

supplying a vanadium chloride gas, a silicon source gas, a carbon source gas, and a hydrogen gas into a changer and forming a vanadium silicon carbide film on a base material by using a plasma chemical vapor deposition method

Methodology Applied

Scientific EffectPlasma chemical vapor deposition: Plasma Enhanced Chemical Vapour Deposition

Data Source

PatentUS12459823B2Vanadium silicon carbide film, vanadium silicon carbide film coated member, and manufacturing method of vanadium silicon carbide film coated member

Publication Date: 2025.11.04 DOWA THERMOTECH

AI summary

A vanadium silicon carbide film contains vanadium, silicon, and carbon, in which the total of a vanadium element concentration, a silicon element concentration, and a carbon element concentration in the film is 90 at % or more.