Unveiling the Mysteries of Diamond Cutting Grains

I. Diverse Models of Diamond Cutting Grains

Diamond cutting grains are high-performance cutting tools available in a wide variety of models. Each model has specific applications and cutting properties. Here are some common models:

II. Materials of Diamond Cutting Grains

1. Polycrystalline Diamond (PCD) Tools

Polycrystalline diamond (PCD) is a synthetic product. It is sintered from diamond powder as raw material under high temperature and high pressure, with a hardness reaching up to HV10000. It is well-suited for machining non-ferrous metals and non-metals, exhibiting excellent cutting capabilities for non-ferrous metals and their alloys such as copper, aluminum, gold, silver, and titanium. Polycrystalline diamond tools are widely used in industries including mobile phones, tablets, automotive parts, motorcycle engine bearings, connecting rods, optical instruments, and electric motors. They are also employed in processing wear-resistant non-metallic materials like cardboard, wood, ceramics, glass, granite, graphite, and plastics. These tools can withstand impact loads, exhibit minimal tool wear, and can be repeatedly resharpened for reuse, offering a durability that is tens to hundreds of times greater than that of cemented carbide tools.

2. Cubic Boron Nitride (PCBN) Tools

Cubic boron nitride is the second inorganic superhard material obtained through ultra-high temperature and high-pressure technology after the artificial synthesis of diamond. Its hardness is second only to that of diamond, and it boasts excellent thermal stability, with a heat resistance of up to 1400-1500℃, nearly double that of diamond (700-800℃). It is ideal for machining various ferrous metals and their alloys, particularly suitable for processing various hardened steels (carbon steel, die steel, high-speed steel), cast iron, high-temperature alloys, and surface-coated welds. The use of cubic boron nitride tools can significantly reduce tool changing frequency and tool wear, thereby fully leveraging the high efficiency of CNC machine tools.

III. Characteristics of Diamond Cutting Grains

Thanks to their unique material advantages, diamond cutting grains excel in cutting performance:

1. Ultra-high Hardness

The hardness of diamond cutting grains far exceeds that of traditional cutting tools, enabling them to effortlessly handle the machining of high-hardness materials.

2. Excellent Wear Resistance

Diamond cutting grains demonstrate outstanding wear resistance, remaining durable over long-term use, which reduces replacement frequency and enhances production efficiency.

3. High Thermal Stability

Diamond cutting grains maintain good cutting performance in high-temperature environments, without deforming or failing easily.

4. High-precision Machining

With sharp and stable cutting edges, diamond cutting grains can achieve high-precision machining, meeting the demands of precision manufacturing.

IV. Wide Processing Range of Diamond Cutting Grains

The widespread application of diamond cutting grains stems from their exceptional cutting performance and broad applicability. They can be used for machining in the following fields:

1. PCD Cutting Grains

PCD cutting grains are primarily used for machining non-ferrous metals (such as copper, aluminum, and aluminum alloys), cemented carbides, graphite, ceramics, and high-hardness wear-resistant materials. They find extensive applications in industries including automotive, diesel engines, motorcycles, aerospace, home appliances, and precision machinery.

2. CBN Cutting Grains

CBN cutting grains are mainly used for machining high-hardness ferrous metals, such as hardened steel, alloy steel, tool steel, die steel, manganese steel, spring steel, bearing steel, chilled cast iron, high-chromium cast iron, gray cast iron, powder metallurgy parts, and Ni-based and Co-based high-temperature alloys. They have wide applications in fields including machinery manufacturing, stamping die processing, bearing processing, powder metallurgy part processing, oil drilling equipment, wind power generation equipment, and medical device manufacturing.

Diamond cutting grains, as high-tech materials, have become the cornerstone of the precision manufacturing sector due to their diverse models, material advantages, exceptional characteristics, and wide processing range. They not only drive the upgrading and transformation of the manufacturing industry but also inspire boundless imagination about future technological advancements. In this era of rapid change, let us anticipate the continued and even greater contributions of diamond cutting grains in leading us toward a more brilliant technological future.