Customer Case | Putzmeister: Customized High-Chrome Blade Solution for Mortar Mixers

Client Overview

Putzmeister, headquartered in Germany, is a world-renowned leader in concrete and mortar delivery systems, with a reputation for stringent performance standards, long service life, and high-precision equipment. In early 2025, they sought a durable, high-precision wear part solution for their mortar mixing blades—a critical component subject to extreme abrasion and mechanical stress.

Challenge

The original blades in use showed signs of accelerated wear and deformation, leading to:

Increased downtime due to frequent maintenance

Uneven mixing performance

Higher operational costs for spare part replacements

Putzmeister needed a reliable OEM partner to redesign and manufacture a blade that could meet their expectations in both service life and performance consistency.

Haitian’s Solution

With rich experience in serving global top-tier brands in concrete and mining machinery, Haitian Heavy Industry provided a full-process OEM solution—from design to delivery.

1. Custom Design & Engineering Support

Used original CAD drawings provided by Putzmeister

Performed 3D modeling and finite element stress analysis to simulate operational conditions

Adjusted structural features for better wear resistance and mixing efficiency

2. High-Chromium Alloy Material

Material: Cr26 high-chrome white iron, known for excellent hardness and wear resistance

Heat treatment optimization to ensure uniform hardness (≥ 60 HRC) and anti-fracture performance

3. Precision Casting with DISA Vertical Molding Line

Automated vertical line casting ensures tight tolerances and high dimensional repeatability

Blade surface uniformity guarantees balanced rotation and smooth material flow

4. Strict Multi-Stage Quality Inspection

Metallographic structure check

Hardness testing (Rockwell & Brinell)

Dynamic balance calibration for stable rotation

Final visual inspection for surface and edge defects

Customer Feedback

“We are very satisfied with Haitian’s quick response and product quality. The new blades performed excellently with much less wear, significantly reducing maintenance time and costs.”
— Putzmeister Technical Support Team

Project Results

Service life increased by over 50% compared to previous blades

Maintenance interval extended, reducing unplanned downtime

Improved mixing performance and operating stability

Strengthened OEM partnership for future component development