Using a circular slicing knife (commonly known as a rolling or circular cutter) can revolutionize your kitchen or crafting experience, but safety and efficiency must go hand in hand. 1. Master the Grip and Angle For maximum efficiency, hold the handle firmly with your dominant hand, placing your index finger on the top spine for added leverage. Keep the blade completely perpendicular to your cutting surface. Tilting the knife reduces cutting power and can damage the blade. 2. Guard Your Fingers Always keep your non-dominant hand away from the cutting path. Use a "claw grip" with your fingers curled inward if you are holding food, or use a non-slip ruler as a shield if you are cutting fabric or paper. Never push the blade directly toward your body. 3. Maintain the Blade A dull blade requires more force, which increases the risk of slipping. Always use a dedicated wooden or plastic cutting board—never cut on stone, glass, or steel surfaces. 4. Safety First Most importantly, always engage the safety lock or blade guard the second you lift the knife off the board. Treat it with the same respect as a traditional chef's knife, and you will enjoy clean, effortless slices every time.

Using 55SiCrA square steel (produced by Baosteel) to manufacture shears traditionally involves conventional annealing processes. However, these methods are characterized by high energy consumption, long cycles, and low production efficiency. By implementing a Quenching and Tempering (Q&T) Spheroidizing preparatory heat treatment, we achieve a uniform spheroidized structure. This effectively eliminates the graphitization tendency typically caused by the high silicon content in 55SiCr steel. For shearing plates under 6mm in thickness, the service life of shear blades increased from 6,000 cuts to 25,000 cuts. This significant improvement in durability offers a clear economic advantage. Licheng Blades: Helping users save every penny!

Selection of Grinding Wheels for Shear Blades 1. Brown Fused Alumina (A) Characteristics: High toughness and high hardness. Applications: Suitable for general grinding and deburring of carbon steel, alloy steel, ordinary steel, and malleable cast iron workpieces. 2. White Fused Alumina (WA) Characteristics: Higher hardness than Brown Fused Alumina with sharp cutting edges, though it has lower toughness. Applications: Ideal for grinding quenched steel, alloy steel, high-speed steel (HSS), and high-carbon steel. Commonly used for gear grinding and thread grinding. 3. Pink Fused Alumina / Chrome Corundum (PA) Characteristics: High toughness, excellent surface finish, and superior edge retention (form holding). Applications: Suitable for internal grinding and profile grinding of tool steel, alloy steel, and quenched steel. Used for tool grinding, copy grinding, and precision grinding of instrument parts where a high-quality finish is required; specifically designed for heat-treated tools. 4. Green Silicon Carbide (GC) Characteristics: Low toughness (brittle), high thermal conductivity, and extremely sharp cutting grains. Applications: Specifically suited for grinding cemented carbide (hard alloy).

Why high-alloy material shearing machine blades need to be tempered multiple times: High-alloy blades that are quenched at high temperatures need to be tempered multiple times.  For example, medium-thick plate shears made of H13 (4Cr5MoSiV1) steel require more than two tempers. This is because these high-temperature quenched high-alloy steel blades contain more retained austenite after quenching. The purpose of multiple tempering is to allow the retained austenite to transform into martensite during tempering cooling, and the martensite formed from retained austenite then transforms into tempered martensite.  If a single long tempering is used, it is difficult to achieve the above structural transformations, resulting in insufficient tempering. This will lead to inconspicuous secondary hardening, poor dimensional stability of the workpiece, higher brittleness, and lower service life.  Licheng Knife is committed to popularizing industry knowledge for the wide audience of frontline sales professionals!

Reasons for the Poor Durability of H13 Shear Blades： In common heat treatment standards, technical requirements often specify only the hardness range. To reduce costs, outsourced heat treatment providers frequently focus solely on meeting this hardness requirement. During the heat treatment process, if the heating temperature or soaking time is insufficient, the alloying elements in the tool steel cannot fully dissolve into the austenite. This results in an inadequate quenched and tempered microstructure, leading to defects such as edge deformation (collapsing) and loss of shape during service. Solutions: 1.Conditioning Treatment: Subject the blade blanks to a preliminary quenching and tempering (conditioning) process to obtain an ideal pearlitic structure. 2.Graded Preheating: Implement multi-stage preheating and optimized soaking times to ensure the alloying elements are fully austenitized.

Shearing blades may suddenly develop cracks or break and fail during use. According to the type of damage, they can be divided into local damage (such as spalling, chipping, missing teeth, etc.) and overall damage, such as fragmentation, fracture, bulging, or splitting. A common characteristic is that most damage occurs at the parts of the blade that experience the greatest force, or in areas where stress is concentrated due to changes in the cross-section.  Based on the characteristics of the fracture process, it can be categorized into brittle fracture and fatigue fracture. Brittle fracture is mainly caused by metallurgical defects or process defects in the blade material, or overload due to improper operation; fatigue fracture is mainly caused by long-term use under cyclic stress and is commonly seen in the shearing of various medium and thick plates, as well as high-strength plates. Understanding the product and understanding the market are the keys to gaining the advantage!

Characteristics of H13 Material Shear Machine Blades： During the forging and heat treatment of H13 material, the surface is easily decarburized due to the influence of high-temperature heating. The drawback of surface decarburization is insufficient hardness. The deeper the decarburized layer, the greater the impact. The preventive measures are: firstly, to properly control the forging and heat treatment temperature; secondly, to apply paint or coating on the surface that requires hardness during heat treatment, in order to minimize decarburization as much as possible.

On May 1st, in this lush greenery and burgeoning early summer, we welcome the holiday that belongs to every worker.   Labor is the ladder of human civilization and progress. Whether it is a towering skyscraper, the sparks that light up the night, or every grain of rice on the dining table, all come from the hardworking hands of laborers. Among them are researchers tackling challenges in laboratories, delivery workers dashing through streets and alleys, and teachers quietly cultivating minds at the podium.   On this ordinary yet great day, we should not only praise the moments of creating miracles but also pay tribute to the ordinary figures who silently persist at their posts. Every profession deserves respect, and every drop of sweat deserves remembrance.   Salute to the laborers:   Because of you, the city’s development has vigorous momentum.   Because of you, the details of life are filled with warmth and convenience.   As we enjoy the holiday, let us extend our highest respect to all workers who contribute silently. May every effort yield a bountiful harvest, and may every dream blossom and bear fruit through hard work!