Gear Case Depth & Gradient Testing With Precision Micro Vickers Hardness Tester

Automotive, machinery and industrial robot gears rely on carburizing, nitriding and quenching processes to improve surface hardness and wear resistance. The surface hardened layer depth and hardness gradient distribution directly determine the gear's fatigue life and load-bearing capacity. However, most gear processing factories have obvious testing loopholes in surface layer detection.

Traditional detection methods can only obtain single-point hardness values of gear surfaces or substrates, unable to detect continuous hardness gradient changes from the gear tooth surface to the core. Uneven carburizing depth will lead to local over-hardening or softening of gear teeth, resulting in tooth surface peeling, wear and fracture during high-speed operation. In addition, gear tooth surfaces are curved and narrow, and macro testing equipment cannot complete effective micro-area sampling, leading to inaccurate process parameter adjustment and unstable batch product quality.

Export gear manufacturers often face order returns from European and American machinery brands due to unqualified hardened layer quality, causing huge economic losses and damaging long-term cooperative relationships.

This microhardness testing equipment is specially optimized for gear heat treatment detection scenarios, supporting continuous multi-point linear testing from the gear tooth surface to the core substrate. The high-precision micro positioning system adapts to narrow curved tooth surfaces, realizing equidistant fixed-point indentation testing without sample damage. The adjustable micro load perfectly matches the thickness range of gear carburizing layers (0.1–2mm), accurately distinguishing the hardness difference between the hardened layer, transition layer and core material.

Gear heat treatment factories widely use micro vickers hardness tester to complete full gradient hardness detection of gear tooth surfaces. The supporting professional analysis software automatically generates surface-to-core hardness distribution curves and accurate hardened layer depth data, helping process engineers accurately adjust carburizing temperature, time and quenching parameters. The equipment effectively solves the problem of unclear gradient data in traditional gear testing, realizing quantitative evaluation of heat treatment quality.

The automatic data statistics function can batch analyze the hardness stability of multiple gear samples, quickly identify abnormal batches and avoid mass unqualified products flowing into the market.

A Polish automotive gear exporter serving European auto brands upgraded its heat treatment QC system in early 2026. Before using professional micro gradient testing equipment, the factory's gear hardened layer detection relied on manual experience judgment, with a batch defect rate of 5.2%. After deploying micro vickers hardness tester, the factory realized precise quantitative detection of gear carburizing layers, reducing the product defect rate to 0.8%.

Accurate gradient data guides the optimization of heat treatment processes, extending the service life of finished gears by more than 20%. Standardized test reports fully meet the quality audit requirements of European auto OEMs, helping the factory increase overseas order volume by 25% within one year. For gear processing enterprises, micro gradient hardness testing has become an indispensable core process for high-quality export product production.

FAQ

Q1: Can the equipment test the hardness gradient of small module micro gears?

A1: High-precision micro positioning system adapts to tiny tooth surfaces of micro gears, realizing accurate gradient testing of ultra-thin hardened layers.

Q2: Can the system automatically calculate the effective carburizing layer depth?

A2: Yes, the professional software automatically identifies the hardened layer boundary and outputs accurate effective layer depth data and gradient distribution charts.