S2 粉末

Overview of S2 Powder

S2 粉末是一种高速工具钢粉末，非常适合用于制造在高温下需要高硬度、高强度和耐磨性的切削工具。它含有钨、钼、钒和其他合金，具有优异的热硬度和抗热疲劳性能。

Key properties and advantages of S2 powder:

S2 Powder Properties and Characteristics

属性	详细信息
组成	Fe-1C-5Cr-2.35Mo-6.4W-1.4V-2Si alloy
密度	7.7 克/立方厘米
粒子形状	不规则、有棱有角
尺寸范围	10-150 微米
表观密度	真实密度高达 50%
流动性	低度至中度
硬度	62-64 HRC when heat treated
韧性	非常好

S2 powder produces cutting tools, dies, and machine components with extended service life under continuous high temperature and intermittent shock loading conditions.

S2 Powder Composition

Typical composition of S2 high speed steel powder:

S2 Powder Composition

要素	重量 %
铁（Fe）	平衡
碳 (C)	0.9-1.2%
铬 (Cr)	3.8-4.5%
钨 (W)	6.4%
钼（Mo）	1.9-2.2%
钒 (V)	1.3-1.6%
锰 (Mn)	0.2-0.5%
硅 (Si)	0.9-1.4%

• 铁提供了铁素体基体
• Carbon, tungsten, and chromium form hard carbides
• Vanadium and molybdenum enhance wear resistance
• Manganese and silicon facilitate machining

The composition is optimized to achieve an exceptional combination of hot hardness, red hardness, and toughness necessary for high speed machining applications.

S2 Powder Physical Properties

S2 Powder Physical Properties

物业	价值观
密度	7.7 克/立方厘米
熔点	1320-1350°C
导热性	37 W/mK
电阻率	0.6 μΩ-m
最高服务温度	600°C
居里温度	770°C

• High density enables miniaturized components
• Retains hardness and strength at elevated temperatures
• 在居里点以上变得顺磁
• Can withstand prolonged service up to 600°C
• Good thermal conductivity reduces thermal expansion stresses

These properties provide a balanced combination of hot hardness and thermal shock resistance required in high speed machining applications.

S2 Powder Mechanical Properties

S2 Powder Mechanical Properties

物业	价值观
硬度	62-64 HRC
横向断裂强度	4500-4800 MPa
抗压强度	3800-4100 MPa
拉伸强度	2050-2250 MPa
屈服强度	1930-2050 MPa
伸长率	8-10%
冲击韧性	10-14 J/cm2

• 热处理后硬度极高
• High strength with reasonable ductility
• Very good compressive and transverse rupture strength
• Excellent red hardness at elevated temperatures
• Strength depends on heat treatment process

S2 powder produces cutting tools and dies with hardness, strength, and thermal properties needed to machine challenging materials at high speeds and temperatures.

S2 Powder Applications

Typical applications of S2 high speed steel powder include:

S2 Powder Applications

行业	用途举例
汽车	Cutting and milling tools
航空航天	Drills, end mills
制造业	Punches, forming dies
石油和天然气	Downhole tools, drill bits
General machining	Turning, boring, and planing tools

一些具体的产品用途：

• Cutting inserts, indexable tooling
• Broaches, reamers, taps, threading dies
• Metal slitting saws and industrial knives
• Extrusion tooling and drawing dies
• Cold heading and forging dies
• Gauges, wear-resistant components

S2’s unique properties make it the top choice for reliable cutting tools and components used in demanding metalworking applications.

S2 Powder Specifications

Key specifications for S2 high speed steel powder:

S2 Powder Standards

标准	说明
ASTM A600	Specification for tool steels high speed steel
JIS G4403	High speed tool steels
DIN 1.2363	Equivalent to AISI S7 high speed steel
UNS T11302	Designation for AISI S2 grade
ISO 4957	Tool steels specification

这些定义

• Chemical composition limits of S2
• 热处理状态下所需的机械性能
• 批准的生产方法，如气体雾化
• 合规性测试协议
• 质量保证要求
• Proper packaging and identification

Powder produced to these standards ensures suitability for high wear resistance tooling applications under thermal fatigue conditions.

S2 Powder Particle Sizes

S2 Powder Particle Size Distribution

颗粒大小	特点
10-22 微米	超细等级可提供最高密度
22-53 微米	最常用的尺寸范围
53-105 微米	较粗的尺寸具有良好的流动性

• 更细的颗粒可在烧结过程中实现更高的致密性
• 更粗的颗粒可提高粉末在模腔中的流动性
• 根据所需的最终部件特性选择尺寸
• 使用气体和水雾化颗粒

控制尺寸分布可优化压制行为、烧结密度和最终部件性能。

S2 Powder Apparent Density

S2 Powder Apparent Density

表观密度	详细信息
真实密度高达 50%	用于不规则粉末形态
4.0-5.0 g/cc	Higher for spherical, lower for irregular powder

• 球形粉末具有较高的表观密度
• Irregular powder has lower density around 45-50%
• Higher apparent density improves die filling and part quality
• Allows complex tool geometry compaction

Higher apparent density leads to better component production rate and performance.

S2 Powder Production Method

S2 Powder Production

方法	详细信息
气体雾化	高压惰性气体将熔融合金流分解成细小液滴
真空感应熔化	在真空下熔化的高纯度输入材料
多重重熔	提高化学均匀性
筛分	将粉末分成不同粒度的部分

• 气体雾化提供球形粉末
• 真空熔化可消除气态杂质
• 多次重熔提高了均匀性
• 后处理可实现粒度定制

Fully automated processes combined with strict quality control ensures reliable and consistent S2 powder properties critical for tooling performance.

S2 Powder Pricing

S2 Powder Pricing

系数	对价格的影响
纯度	高纯度等级的成本更高
颗粒大小	超细粉更贵
订购数量	数量越大，价格越低
附加服务	定制增加成本

指示性定价

• S2 spherical powder: $18-22 per kg
• S2 irregular powder: $12-16 per kg
• Large volume pricing up to 30% lower

Pricing depends on purity, particle characteristics, order quantity, and any additional customization requirements.

S2 Powder Suppliers

S2 Powder Suppliers

公司名称	地点
赫加纳斯	瑞典
卡彭特粉末产品	美国
Erasteel	美国、欧洲
Crucible Industries	美国
voxco	德国
Jingdong New Materials	中国

选择供应商的关键因素：

• 提供的粉末等级
• 生产能力
• Particle characteristics and consistency
• Testing capability and quality control
• Pricing and lead times
• Technical customer service

S2 Powder Handling and Storage

S2 Powder Handling

建议	原因
确保适当的通风	防止接触细金属颗粒
使用适当的个人防护设备	Avoid ingestion through nose/mouth
Ground equipment	Prevent static sparking
避免火源	易燃粉尘危险
使用不产生火花的工具	防止点火的可能性
遵循安全协议	Reduce fire, explosion, health risks

存储建议

• Store sealed containers away from moisture or contamination
• Maintain storage temperatures below 27°C
• Limit exposure to oxidizing acids and chlorine compounds

Proper precautions during handling and storage help preserve purity and prevent safety hazards.

S2 Powder Inspection and Testing

S2 Powder Testing

测试	详细信息
化学分析	Verifies composition using optical/ICP spectroscopy
粒度分析	Determines size distribution using laser diffraction or sieving
表观密度	Measured as per ASTM B212 using Hall flowmeter
粉末形态	通过扫描电子显微镜成像确定颗粒形状
Flow rate test	通过指定漏斗的重力流速
水龙头密度测试	机械敲击粉末样品后测量的密度

测试可确保粉末符合所需的化学成分、物理特性、粒度分布、形态、密度和流速规格。

S2 Powder Pros and Cons

Advantages of S2 Powder

• Exceptional hot hardness and red hardness
• High strength and wear resistance at elevated temperatures
• Good toughness and thermal shock resistance
• Resists softening and shape changes up to 600°C
• Dimensional stability under thermal cycling
• Cost-effective compared to exotic PM tool steel grades

Limitations of S2 Powder

• 无需表面处理，具有中等耐腐蚀性
• Limited cold formability and shear strength
• 需要由经验丰富的供应商进行仔细的热处理
• 不能使用传统熔化焊接
• Large cross-sections can experience embrittlement
• Contains expensive alloying elements

Comparison With H13 Tool Steel Powder

S2 vs H13 Tool Steel Powder

参数	S2	H13
硬度	62-64 HRC	54-57 HRC
Hot hardness	优秀	良好
韧性	非常好	良好
抗热震性	优秀	中度
冷强度	良好	优秀
费用	高	低

• S2 has much greater hot hardness and thermal shock resistance
• H13 provides better cold strength and toughness
• S2 is more expensive due to higher alloy content
• S2 preferred for high speed machining applications
• H13 suited for cold and warm pressing tooling

S2 Powder FAQs

Q: What are the main applications of S2 tool steel powder?

A: Main applications include cutting tools like drills, mills, inserts, taps, dies, saws, planing tools, as well as extrusion tooling, forging dies, gauges, and components needing hot hardness and thermal shock resistance.

Q: What heat treatment is used for S2 tool steel powder?

A: S2 tool steel is typically heat treated by austenitizing between 1150-1200°C followed by air, oil, or polymer quenching, then tempering between 540-650°C to achieve hardness between 62-64 HRC.

Q: How does tungsten improve the properties of S2 steel?

A: Tungsten forms hard tungsten-iron-carbon complexes that provide exceptional hot hardness, strength and wear resistance at elevated temperatures needed for high speed machining applications.

Q: What safety precautions should be used when working with S2 powder?

A: Proper ventilation, protective gear, inert atmosphere, grounding, avoiding ignition sources, using non-sparking tools, and safe storage away from contamination or moisture.