Introduction

Nitrogen gas springs hold significant importance in the mold industry, contributing to various applications. This article delves into a critical aspect of nitrogen gas springs – the methods for selecting suitable materials.

Importance of Material Selection

The choice of material for nitrogen gas springs profoundly impacts their performance, lifespan, stability, cost, and more. Highlighting the pivotal role of correct material selection in mold design and manufacturing.

Factors Affecting Material Selection

A comprehensive understanding of factors to consider when selecting materials for mold nitrogen gas springs includes:

• Nature and magnitude of load-bearing properties.
• Stress state and magnitude.
• Operating temperature and environmental conditions.
• Lifespan requirements.
• Conductive and magnetic properties.
• Material’s processability, origin, and cost.

Principles of Material Selection

Practical principles for material selection include prioritizing domestically and nationally standardized series dimensions and avoiding non-standard specifications. Different types of mold nitrogen gas springs may require different materials. For instance, spiral tension mold nitrogen gas springs could favor materials like quenched and tempered steel wires, known for their strength and stability.

Material Selection for Different-Sized Mold Nitrogen Gas Springs

Material selection principles vary based on the size of the mold nitrogen gas springs:

• Small to medium-sized mold nitrogen gas springs, especially spiral tension ones, benefit from strengthened steel wires, including lead-bath temperature-cold-drawn steel wires and oil quenched and tempered steel wires. These offer high strength, good surface quality, and fatigue resistance.
• Carbon mold nitrogen gas spring steel wires and piano wires exhibit substantial residual stress after cold drawing, leading to challenges in controlling dimensional accuracy after forming.
• Oil quenched and tempered steel wires, on the other hand, undergo a stabilizing treatment after being drawn to the specified dimensions, resulting in minimal residual stress. This leads to better dimensional stability and heat resistance.

For larger mold nitrogen gas springs, those requiring high load precision and stress levels should consider cold-drawn or cold-drawn and polished steel materials. For springs with lower load precision and stress levels, hot-rolled steel materials might be suitable.