Spherical Crucible Steel Powder CPM® Rex® 54® (HS) High Speed Steel Powder

Crucible Steel Spherical Powder CPM® Rex® 54® (HS) High Speed Steel Spherical Powder Product Information -:- For detailed product information, please contact sales. -: Crucible Steel Spherical Powder CPM® Rex® 54® (HS) High Speed Steel Spherical Powder Synonyms -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Spherical Crucible Steel Powder CPM® Rex® 54® (HS) High Speed Steel Powder characteristics -:- For detailed product information, please contact sales. -: Spherical Crucible Steel Powder CPM® Rex® 54® (HS) High Speed Steel Powder Particle Size -:- For detailed product information, please contact sales. -: -:- -:- 0-15μm ,5-25μm, 15-45μm, 15-53μm,20-63um, 45-75μm, 45-105μm, 45-150μm ,75-150μm. (Various granularities can be customized according to customer requirements) -:- For detailed product information, please contact sales. -:

Spherical Crucible Steel Powder CPM® Rex® 54® (HS) High Speed Steel Powder Applicable processes -:- For detailed product information, please contact sales. -: Laser/electron beam additive manufacturing (SLM/EBM, 3D printing) Direct laser deposition (DLD) Used in thermal spray (TSA) Powder hot isostatic pressing (HIP) Metal injection molding (MIM) Powder metallurgy (PM) Laser cladding (LC), etc. -:- For detailed product information, please contact sales. -: Spherical Crucible Steel Powder CPM® Rex® 54® (HS) High Speed Steel Powder Chemical Composition -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Crucible Steel CPM® Rex® 54® (HS) High Speed Steel Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: Crucible CPM® REX® 54® (HS) High Speed Steel** Crucible CPM® REX® 54® (HS) represents the pinnacle of premium cobalt-bearing powder metallurgy high-speed steel technology, engineered specifically for **extreme cutting applications requiring maximum hot hardness coupled with exceptional wear resistance**. This advanced material combines the highest levels of cobalt and vanadium in the CPM REX series to deliver unparalleled performance in the most demanding machining environments, particularly those involving high-temperature alloys, hardened steels, and abrasive composites. Manufactured through Crucible's proprietary CPM (Crucible Particle Metallurgy) process, REX 54 features an ultra-fine, homogeneous microstructure that eliminates the carbide segregation inherent in conventional high-alloy steels. This results in **superior transverse toughness, enhanced grindability (relative to its alloy content), excellent dimensional stability during heat treatment, and consistent performance** across all orientations. The "HS" designation underscores its optimization for high-speed machining operations where thermal softening and abrasive wear are primary failure mechanisms. --- ## **1. Chemical Composition (Weight %)** REX 54 employs a strategic alloy design that pushes both cobalt and vanadium content to achieve exceptional performance characteristics. | **Element** | **Carbon (C)** | **Tungsten (W)** | **Molybdenum (Mo)** | **Chromium (Cr)** | **Vanadium (V)** | **Cobalt (Co)** | |-------------|----------------|------------------|---------------------|-------------------|------------------|-----------------| | **Content** | **1.40** | **6.50** | **4.75** | **4.00** | **4.00** | **10.50** | | **Role** | Provides the foundation for carbide formation and ensures a high-hardness matrix capable of supporting the cutting edge under extreme conditions. | Contributes to solid solution strengthening and forms stable carbides; a primary contributor to **hot hardness**. | Enhances hardenability and secondary hardening response; works synergistically with tungsten for optimal high-temperature performance. | Ensures sufficient hardenability depth and provides moderate oxidation/corrosion resistance during high-temperature operation. | **Critical wear resistance element** - forms extremely hard vanadium carbides (VC) that provide **superior abrasion resistance** even at elevated temperatures. | **Key differentiator** - dramatically increases **hot hardness** by strengthening the ferrite matrix, resisting tempering effects at high cutting temperatures. | *Note: Iron (Fe) constitutes the remainder. This composition represents a modern PM-optimized version of the classic high-cobalt, high-vanadium high-speed steel archetype.* --- ## **2. Physical & Mechanical Properties** *Typical properties after optimal heat treatment to 67-69 HRC.* * **Density:** Approximately 8.25 g/cm³ * **Modulus of Elasticity:** ~215 GPa (31.2 × 10⁶ psi) * **Thermal Conductivity:** Moderate for a HSS; the high cobalt content aids in heat transfer away from the cutting edge. * **Hot Hardness (Red Hardness):** **Exceptional.** Maintains hardness above 62 HRC at temperatures exceeding **650°C (1200°F)** due to the synergistic effect of high cobalt (10.5%) and balanced carbon/alloy content. This enables sustained high-speed cutting operations with minimal thermal degradation. * **Hardness (Typical Working Range):** **67 - 70 HRC.** Most commonly applied at **68-69 HRC** to achieve maximum wear resistance and hot hardness while retaining sufficient toughness to resist chipping through optimized heat treatment. * **Abrasion Resistance:** **Excellent.** The 4% vanadium content generates a high volume fraction of hard carbides, providing wear resistance that surpasses standard high-speed steels (M2, M42) and approaches that of dedicated wear-resistant tool steels, but with significantly better hot hardness. * **Toughness:** **Good for its performance category.** Despite its extreme hardness and alloy content, the CPM-derived uniform microstructure provides significantly better toughness than conventionally processed steels of equivalent composition (e.g., wrought T15), enabling it to better withstand interrupted cuts. * **Grindability:** **Challenging.** The high hardness and substantial volume of hard vanadium carbides make grinding difficult. **CBN (Cubic Boron Nitride) wheels are strongly recommended** for grinding in the hardened state. Machinable in the annealed condition with carbide tooling. --- ## **3. Heat Treatment** Precise thermal processing is critical to unlocking REX 54's full potential. * **Annealing:** Heat to 870-900°C (1600-1650°F), slow cool. Typical annealed hardness: 270-310 HB. * **Stress Relieving (After Machining):** 650-700°C (1200-1290°F), hold, then slow cool. * **Preheating:** **Essential.** Employ a **double preheat**: First at 540-650°C (1000-1200°F), then at 815-870°C (1500-1600°F) with thorough soaking. * **Austenitizing:** **1190-1220°C (2175-2230°F).** **Typical recommended range is 1200-1210°C (2190-2210°F).** Temperature selection is crucial for balancing properties: higher temperatures favor hardness and wear resistance at the expense of toughness. * **Quenching:** **Gas/pressure quenching** (vacuum or controlled atmosphere) is preferred for optimal dimensional stability and uniformity. Still air quenching may be used for simple geometries. **Avoid oil quenching.** * **Tempering:** **Multiple tempers required.** Temper immediately after reaching room temperature. **Minimum of three tempers**, each for 2 hours, is standard. **Typical tempering range: 540-560°C (1005-1040°F).** A pronounced secondary hardening peak occurs in this range. * **Sub-Zero Treatment:** **Highly recommended.** Perform between quenching and the first temper (-80°C to -100°C / -112°F to -148°F) to minimize retained austenite, ensuring maximum hardness, dimensional stability, and thermal stability in service. --- ## **4. Key Applications** CPM REX 54 is engineered for the most severe **high-temperature, high-speed, and high-wear** machining challenges. * **High-Temperature & Superalloy Machining:** End mills, drills, reamers, and broaches for machining Inconel, Waspaloy, titanium alloys, and other materials that generate extreme heat and cause rapid tool wear. * **High-Speed Machining (HSM) of Hardened Materials:** Finishing and semi-finishing end mills and ball-nose cutters for hard milling of die/mold steels and hardened components (up to 55+ HRC). * **Precision Machining of Abrasive Materials:** Cutting tools for abrasive composites (e.g., carbon fiber reinforced plastics), high-silicon aluminum alloys, and surface-hardened or nitrided parts. * **High-Performance Gear & Thread Manufacturing:** Hobs, shaper cutters, and thread mills for high-volume production of high-strength gears and threads. * **Premium Specialized Tooling:** Industrial cutting blades requiring extreme wear resistance and hot hardness for specific demanding applications. --- ## **5. International Standards & Cross-References** CPM REX 54 is a proprietary grade, representing a modern high-performance evolution of classic high-cobalt high-speed steels. * **AISI/SAE:** **T15** is the closest conventional equivalent in terms of composition (high cobalt, high vanadium). REX 54 can be considered a PM-optimized, performance-enhanced version of T15. * **ISO:** No direct equivalent. Its composition falls under the general **HS (High Speed)** classification but exceeds standard grade specifications. * **European (EN):** No direct equivalent. Conceptually similar to proprietary "Ultra High-Speed Steel" or "PM Super HSS" grades from European manufacturers. * **Japanese (JIS):** No direct equivalent. Distinct from standard SKH series grades. * **Common Industry Comparisons:** Often referred to as a **"PM T15"** or **"Super T15."** Competing analogues include other manufacturers' powder metallurgy ultra-high-performance high-speed steels designed for maximum hot hardness and wear resistance balance. --- ## **6. Advantages & Limitations** **Advantages:** * **Exceptional Hot Hardness:** The 10.5% cobalt content provides industry-leading resistance to thermal softening. * **Superior Wear Resistance:** 4% vanadium ensures outstanding abrasion resistance in demanding cutting conditions. * **Excellent Property Balance:** The CPM process enables a remarkable balance of wear resistance, hot hardness, and toughness at this alloy level. * **Performance Superiority over Conventional Steel:** Offers significantly better wear resistance and toughness compared to traditionally processed steels of similar composition (e.g., wrought T15). **Limitations:** * **High Cost:** Premium pricing due to expensive cobalt/vanadium content and complex PM manufacturing. * **Difficult Grinding:** Requires CBN wheels and proper grinding techniques, increasing manufacturing and regrinding costs. * **Demanding Heat Treatment:** Requires precise thermal processing with a relatively narrow window; improper treatment can lead to suboptimal performance or embrittlement. * **Specialized Application:** Its superior performance is most cost-effective only in specific, extreme machining conditions and is not suitable for general-purpose applications. --- ## **7. Summary** **Crucible CPM REX 54 (HS) is a top-tier, high-performance high-speed steel designed for extreme machining applications where thermal softening and abrasive wear are co-limiting factors.** It represents an advanced material solution for manufacturers pushing productivity boundaries in aerospace, energy, and precision tooling industries. By combining the highest levels of cobalt and vanadium within an optimized PM microstructure, REX 54 delivers an unparalleled combination of hot hardness and wear resistance, making it one of the most capable tool materials available for tackling the most difficult machining challenges. -:- For detailed product information, please contact sales. -: Crucible Steel CPM® Rex® 54® (HS) High Speed Steel Specification Dimensions Size： Diameter 20-1000 mm Length <6955 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: Crucible Steel CPM® Rex® 54® (HS) High Speed Steel Properties -:- For detailed product information, please contact sales. -:

Spherical Crucible Steel Powder CPM® Rex® 54® (HS) High Speed Steel Powder Particle Size Description -:- For detailed product information, please contact sales. -: Applications of Spherical Crucible Steel Powder CPM® Rex® 54® (HS) High Speed Steel Powder -:- For detailed product information, please contact sales. -: -:- For detailed product information, please contact sales. -: Applications of Crucible Steel Spherical Powder CPM® Rex® 54® (HS) High Speed Steel Spherical Powder -:- For detailed product information, please contact sales. -: Chemical Identifiers Crucible Steel Spherical Powder CPM® Rex® 54® (HS) High Speed Steel Spherical Powder -:- For detailed product information, please contact sales. -:

Packing of Crucible Steel Spherical Powder CPM® Rex® 54® (HS) High Speed Steel Spherical Powder -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Spherical Powder drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 3426 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition