Cold heading detection method for spiral spikes

1. Cold heading of spiral spikes

Spiral spikes are a key material for fixing railway tracks, with good durability and stability. Its production process usually includes cutting, wire drawing, drilling, carburizing and cold heading.

Cold heading is an indispensable step in the production of spiral spikes. The heated steel wire material is cold-pressed in the mold for multiple times to maintain its strength and stability. The spiral spikes after cold heading have a smooth surface, high dimensional accuracy and uniform strength.

2. Common detection methods

(1). Metallographic detection

Metallographic detection is one of the commonly used detection methods in the production of spiral spikes. It mainly determines its quality by observing the metallographic structure and components of the material under a microscope. Metallographic detection can detect internal defects, foreign matter inclusions and uniformity of the structure of the spiral spikes.

(2). Hardness detection

Hardness detection is to measure the hardness of the material through a hardness tester to determine its quality and performance. In the production process of spiral spikes, hardness detection can be used to detect the uniformity and strength of the material.

(3). Tensile test

Tensile test is a method to test the performance of materials under tensile force. In the production of spiral spikes, tensile test can detect the performance indicators of materials such as strength, ductility and elasticity.