High-Chromium Cast Iron Slurry Pump Flow Parts Lost Foam Casting - Cr26 Impeller

Our lost foam casting line produces complete sets of slurry pump castings, categorized into High-Chromium Cast Iron flow parts and Gray Iron structural parts. Below are our core products supplied in volume:

1. Impeller / Pump Impeller

2. Front Liner / Suction Liner

3. Rear Liner / Discharge Liner

4. Casing Liner / Shell Liner

5. Volute Casing / Volute

6. Auxiliary Impeller / Expeller

7. Wear Plate / Liner Plate

8. Discharge Elbow / Bend

9. Suction Tube / Inlet Pipe

10. Relief Cover / Pressure Reducing Cover

11. Pump Body / Casing Frame

12. Bracket / Pedestal / Support

13. Base / Foundation Plate

14. Bearing Housing / Bearing Stand

15. Pump Cover / Back Cover

16. Shaft Sleeve (Gray Iron or Bronze option)

17. Stuffing Box / Gland Housing

18. Mounting Bracket / Support Frame

These castings are widely used in iron/copper ore beneficiation plants, coal preparation heavy-media systems, thermal power plant ash conveying, and smelter slag pumping. We highly recommend the combination of Cr26 High-Chromium Cast Iron + Lost Foam Process—precise flow passage dimensions and smooth surfaces reduce flow resistance, delay wear, and significantly extend pump overhaul intervals. Whether you need a complete pump casting set or individual spare parts, we support customization per drawing.

中文(约420字):
渣浆泵过流件(尤其是高铬铸铁叶轮,护板)在高速矿浆冲刷下,其耐磨寿命直接决定整台泵的检修频率和生产线的连续作业率.我们的工厂已通过ISO 9001:2015认证,并针对高铬铸铁渣浆泵铸件建立了专项质量控制体系:

• 化学成分精准控制:炉前光谱分析确保Cr(26%-28%),C(2.6%-3.0%),Mo(0.5%-1.5%)等关键元素达标.碳化物形态和分布通过金相检验严格把关,确保M7C3型碳化物(而非脆性M23C6)占主导地位.

• 热处理工艺:采用淬火(950-1050℃)+ 低温回火(200-300℃) 工艺,获得高硬度马氏体基体.每炉热处理均随炉放置试块,检测硬度(HRC≥58)和冲击韧性(≥5 J/cm²),确保耐磨性与抗冲击性达到最佳平衡.

• 无损检测:对叶轮等高速旋转件进行磁粉探伤(MT),杜绝表面裂纹；对蜗壳等承压件进行超声波探伤(UT),确保内部无缩松,气孔.

• 控制CE值(碳当量3.8%-4.2%),确保抗拉强度≥250MPa；金相检验确保石墨形态为A型,杜绝D/E型过冷石墨.

• 采用数控加工泡沫模样,确保叶轮叶片扭曲角度,蜗壳流道截面的精确性；铸件尺寸检测采用三坐标测量机(CMM),确保安装配合面及流道尺寸符合图纸要求.

1. 您提供泵型号或图纸(标注材质及硬度要求).

2. 我们制作消失模白模(EPS泡沫)并进行组模.

3. 消失模铸造→热处理(高铬铸铁)→尺寸检验.

4. 交付附带材质证书,热处理报告和尺寸检测报告.

• 消失模件打样周期约25-35天(依复杂程度).

• 批量订单可分批交付,满足矿山备件紧急需求.
  选择我们,您将获得高耐磨,高精度,长寿命的渣浆泵铸件,大幅降低您的吨矿输送成本.

English (approx. 390 words):
The wear life of slurry pump flow parts—especially high-chromium cast iron impellers and liners—directly determines pump maintenance frequency and production line uptime. Our factory is ISO 9001:2015 certified with a dedicated quality control system for high-chromium slurry pump castings:

• Precise Chemistry Control – Pre-pour spectrometer analysis ensures critical elements like Cr (26%-28%), C (2.6%-3.0%), and Mo (0.5%-1.5%) meet specifications. Carbide morphology is verified via metallographic inspection to ensure M7C3 carbides (rather than brittle M23C6) are dominant.

• Heat Treatment – Quenching (950-1050℃) + Low-Temperature Tempering (200-300℃) to achieve high-hardness martensitic matrix. Test coupons accompany each batch for hardness (HRC≥58) and impact toughness (≥5 J/cm²) to achieve the optimal balance between wear resistance and toughness.

• NDT – Magnetic Particle Inspection (MT) for high-speed rotating parts like impellers to eliminate surface cracks; Ultrasonic Testing (UT) for pressure-retaining parts like volutes to eliminate internal shrinkage and porosity.

• CE value (3.8%-4.2%) controlled to ensure tensile strength ≥250MPa; metallographic inspection ensures A-type graphite morphology.

• CNC-machined foam patterns ensure precise impeller blade twist angles and volute cross-section profiles; CMM inspection verifies mounting interfaces and flow passage dimensions per drawings.

1. You provide pump model or drawings (specifying material and hardness requirements).

2. We produce lost foam patterns (EPS) and assemble the cluster.

3. Lost Foam Casting → Heat Treatment (for High-Cr) → Dimensional Inspection.

4. Delivery includes material certificate, heat treatment report, and dimensional inspection report.

• Lost foam samples approx. 25-35 days (depending on complexity).

• Batch orders can be shipped in partial lots to meet urgent mining spare parts demands.
  Choose us for high-wear-resistance, high-precision, long-life slurry pump castings—significantly reducing your cost per ton of slurry conveyed.