Senda Group Co.，Ltd

SENDA for metal processing solutions.

A.ESR raw material

The largest metal ingot can reach 3 tons in SENDA factory. The ingot obtained by this remelting/refining process is very homogeneous and free of internal defects. The segregation of the ingot (called macro-segregations ) are substantially eliminated and the segregations of crystals (called macro-segregations) are significantly reduced.

The ESR remelted material enhance following mechanical characteristics:
a. Improved toughness due to increasing homogeneity and isotropy
b. Improved creep resistance properties
c. Better fatigue strength and tenacity properties as well as outstanding tensile strength
d. Improved purity

B. Forging ALL the blades

The largest electro-hydraulic hammer is 4.5 ton, with more than 6 skilled workers. After forging, the inside microstructure grow much closer and the metal grain size becomes much smaller. It can elevate the characteristics and quality of the blade, ensuring a longer life.

C. Professional heat treatment technology

SENDA has independent workshop for heat-treatment process with couples of skilled technicians. Actually, most blades ( thickness ≤100mm) can be fully hardened. Thus, the blades can be used after repairing until the size reached the Min. design dimension.

Below are Vaccum type heat-treatment:

2. SENDA accept third party inspection , SGS, ITS etc.

To improve the customer experience and maintain strict standards of product quality, SENDA introduced SGS third party to escort the product quality. Through strict inspection and testing, product, process, system and service in accordance with national and international regulations and standards.

3. SENDA has complete quality feedback system.

SENDA takes responsibility for any failure caused by us, and reproduce new blades for you for free. But we seldom receive claim about the quality of our products. Before the delivery, we all check the quality for every piece of blades. We will never send out products with problems.

4. SENDA also provide analysis and solutions for shear problems.

We can provide technical service from our engineer to assist you in realizing a high quality output, according to the on-site working experience.

Main Production Facility：

• CNC Surface Grinding Machine : Max 6000 mm Length
• Surface Grinding Machine : Max 3000 mm Length
• Electric Furnace : Max 3600mm, 1100mm Lenght
• Plano Miller : Max 4000mm Lenght
• Cylindrical Grinding Machine : Max Outside Diameter Ø900 mm
• CNC Rotary Grinding Machine : Max Outside Dimeter Ø508 mm
• Rotary Grinding Machine : Max Outside Diameter Ø700 mm
• Universal Grinding Machine : Max Outside Diameter Ø900 mm
• SANSEI Grinding Machine : Max Oustside Diameter Ø508 mm

Factory Tour:

Laying-off: selecting raw material​

Forging: enhance the density and consistency

Annealing: increase the ductility and reduce the hardness

Machining: to be shaped into an intended design

Packaging

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Scientific and reasonable Chemical composition matching in SENDA lab:

Besides regular elements, proper percentage of elements are added into our products. For the sake of fast composition analyses, the company has invested amount of capitals and energy for testing equipment.

Tungsten Carbide (TCT)

M51

SKH-51

LD (7Cr7Mo2V2Si)

SKD-11/D2/K110（Cr12Mo1V1）

H12（3Cr5WMoVSi ）

H13 (4Cr5MoSiV1)

H13K (4CR5MOSIV1)

Advanced smelting process

The company chooses medium-frequency induction furance to melt raw materials. During this process, lots of impurities and harmful gas are filitered out. The final raw material are pure and without casting segregation.

Strict and Accurate temperature control process

based on more than 20 years production experience, the company worked out a strict temperature control criteria and professional inspectors.

Advanced heat treatment process

Professional heat treatment can make steel performance achieved. The company earns advances equipments and skilled engineers and workers. Excellent heat treatment technology is our core competence and bring our products famous at home and overseas.

Senda history:

1998 the founder Alex Lee established the Senda factory, there’s only 6 employees at the beginning.

2000 Senda built the own heat-treatment workshop for the blades.

2003~2005 we build the cooperation with the largest steel factory in China, Bao Steel, on the research and development of new material, and providing the blades for Bao Steel.

2006~2007 Senda invite German professionals to our factory to guide the heat-treatment process and technology, and perfect our quality management system and new testing equipment.

2008 Senda knives for metal industrials were ready for export.

2011~2013 Senda developed the SLD material specially used for shearing high strength steel. And we also start to make the tungsten carbide knives.

2016 Senda expand the office in Wuxi city, where near Shanghai, for overseas business handling.

Till now, we are still focus on research and development of new material and products, seeking more foreign markets shares to build a popular brand.

1. the material selection for different applicaiton of metal processing, coppers, different thickness of stainless steel(SS), cold rolled steel(CRS), Galvanized Iron coil (GI) etc.

2. knives measuring when drawing is not available.

3. the re-sharping of knives.

4. on-sit metal processing blades maintance.

5. knives recycling

"Customer first, quality first", SENDA always put the quality of the products and services as the company's development strategy, in the process of production management, product in strict accordance with the quality management system, implementation of "management standardization, operation standardization" system. Using metallographic analysis, physical and chemical analysis, nondestructive flaw detection, tensile impact test and other high-end testing equipments, strict controls of each working procedures, direct control of the quality of our knives and put an end to unqualified products flow out. Fully completes the pre-sale, sale and after-sale service of each part, really let customers at ease.