As World Environment Day 2026 (June 5) approaches, this year’s theme in China, “Comprehensive Green Transformation, Building a Beautiful China Together”, has sparked widespread reflection on adopting greener production and lifestyles. Against this backdrop, the heat treatment industry faces particularly intense environmental pressures. The quenching workshop, often filled with blazing flames and dense oil smoke, not only poses significant safety risks but also contradicts the principles of green development: reducing carbon, minimizing pollution, expanding greenery, and promoting growth. The fire hazards, environmental pollution, and health risks associated with traditional quenching oils have become pressing challenges for heat treatment enterprises.
Is there a fluid that combines the gentle cooling performance of quenching oil while completely eliminating smoke and open flames—truly embodying green manufacturing? The launch of Corun KR9988, an environmentally friendly quenching fluid, is a proactive response to this era’s demand, providing a practical industrial solution for comprehensive green transformation.
Its differentiating breakthrough lies in precisely targeting the technical key of “oil-like quenching.” Its core technical advantages include:
1. Low low-temperature cooling rate: Significantly reduces the risk of quench cracking in thin-walled and complex workpieces.
2. Adjustable cooling rate: By adjusting concentration, its cooling curve can flexibly match the quenching requirements of different materials, broadening its application range.
3. Win-win for environment and economy: The quenching process is smoke-free, flame-free, and pollution-free, ensuring a clean and safe working environment. Moreover, it only requires 5%-20% concentration for use. Compared with 100% traditional quenching oil, the initial tank-filling cost is significantly reduced, achieving both economic and environmental benefits.
1. Dual Verification: Experimental Data and Workpiece Performance
Laboratory cooling curve comparisons show that a 10% concentration of KR9988 exhibits cooling characteristics closely aligned with rapid quenching oil. More importantly, regarding actual workpiece performance, it achieves a smooth transition “from oil to water”:
For standard components made of 42CrMo M30 bolts, 40Cr M20 bolts, and B7 M20 bolts, the core hardness and metallographic structure (such as martensite level) after quenching with KR9988 are fully comparable—or even superior—to those achieved with rapid quenching oil.
• 42CrMo: M30 bolts
• 42CrMo: M20 bolts (corrected material grade)
• B7: M20 bolts
2. Extensive Industry Application Cases
From heavy equipment to precision components, KR9988 has successfully replaced various mechanical oils and quenching oils, becoming a reliable partner for enterprises pursuing green manufacturing:
• Petroleum valve boxes and large mold forgings: Materials 30CrNi3MoV and 5CrNiMoV (single pieces weighing up to 20 tons), quenched in 200 m³ tanks using KR9988 (10-12% concentration), successfully replacing traditional mechanical oil. Post-tempering hardness met standards.
• High-pressure pipe assemblies: Replaced the previous “mechanical oil + diesel” mixture, resolving environmental and safety issues in one step.
• High-chromium grinding balls (Φ100mm): Quenched at 25% concentration; core hardness comparable to oil quenching.
• Thin-walled components (65Mn clothing shears, wall thickness 6mm): Applied in high-frequency quenching, achieving high surface hardness (61-63 HRC) without cracks.
Therefore, Corun KR9988 is not only an environmentally friendly medium matching the performance of quenching oil but also a green quenching solution that supports “comprehensive green transformation, building a beautiful China together.” It enables enterprises to improve product quality while actively fulfilling environmental responsibilities.
As a leading provider of green industrial fluid systems, Corun consistently integrates the concept of green development into product R&D and application practice. By continuously launching solutions like KR9988 that “replace oil with water”, we actively respond to the national call for coordinated carbon reduction, pollution mitigation, greenery expansion, and growth, helping the industry achieve clean production and safe transformation, thereby contributing to ecological security and driving industrial green development.
