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Seven Differences Between Laser Hardening and High-Frequency Hardening

Seven Differences Between Laser Hardening and High-Frequency Hardening

Explaining the differences between laser hardening and high-frequency hardening classified into seven categories! Introducing heating methods and hardening ranges.

This document is a technical report introducing the seven differences between laser hardening and high-frequency hardening. While high-frequency hardening and laser hardening are very similar techniques for surface treatment known as partial hardening, there are various differences in the heating process, cooling process, and quality control items for hardening. By understanding the differences in each technique, it becomes possible to effectively differentiate between the two technologies. This document categorizes and explains these differences into "seven" points. Please take a moment to read it. [Contents] ■ Introduction ■ Seven Differences Between Laser Hardening and High-Frequency Hardening ■ Conclusion *For more details, please refer to the PDF document or feel free to contact us.

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Tips for Setting Laser Hardening Conditions

Tips for Setting Laser Hardening Conditions

Introducing differences based on the state of work! Explaining tips for setting conditions for laser hardening!

This document is a technical report that discusses tips for setting laser hardening conditions. Typical parameters for laser hardening include laser output, travel speed, spot diameter, and irradiation angle. It explains how variations in each of these parameters affect the quality of heat treatment. Additionally, it notes that factors influencing heat treatment quality are not limited to the equipment and laser side, but also include the surface condition of the workpiece and its thickness. By understanding these fundamental aspects, insights into setting laser hardening conditions can be gained. We encourage you to read it. [Contents] ■ Introduction ■ Relationship between laser parameters and heat treatment quality ■ Differences based on the condition of the workpiece ■ Conclusion *For more details, please refer to the PDF document or feel free to contact us.

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Laser Hardening Case Studies Vol. 01-10

Laser Hardening Case Studies Vol. 01-10

A collection of laser hardening case studies addressing various projects with top-class domestic facilities.

We will introduce examples of laser hardening that prevents distortion and cracking, making it possible to harden precision parts and complex-shaped components. 【Example Lineup】 ■ M1 Gear One Tooth One Shot Laser Hardening ■ Eyebrow Type Piston A Laser Hardening ■ Fan-Shaped Plate Laser Hardening ■ 100mm Width Laser Hardening ■ M1.5 Small Gear Tooth Surface Movement Laser Hardening ■ High-Frequency Hardened Shaft Key Groove Bottom Surface Laser Hardening ■ Roller Sliding Surface Laser Hardening ■ Small Punching Die Laser Hardening ■ Thin-Walled Roller Laser Hardening ■ Scroll Cam Laser Hardening

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Shaft machining examples

Shaft machining examples

We would like to introduce our company's "shaft" processing examples.

【High-Frequency Hardening Case Lineup】 ■ Intermediate Joint High-Frequency Hardening ■ φ150 Shaft High-Frequency Hardening ■ Large Shaft High-Frequency Hardening 【Laser Hardening Case Lineup】 ■ High-Frequency Hardened Shaft Keyway Bottom Laser Hardening ■ Rotating Shaft Laser Hardening ■ Spindle Laser Hardening ■ Small Diameter Ball Screw Keyway Laser Hardening ■ Piston Shaft Laser Hardening ■ Thin-Walled Hollow Bolt Spiral Laser Hardening ■ Large Tapered Roll Laser Hardening 【Laser Cladding Case Lineup】 ■ High-Speed Laser Cladding ■ Shaft with Keyway Laser Cladding ■ Repair Laser Cladding for Shaft with Keyway ■ Center Pin Laser Cladding Repair

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Plate processing examples

Plate processing examples

We would like to introduce our company's "plate" processing examples.

【High-Frequency Hardening Case Lineup】 ■ L-Shaped Plate High-Frequency Hardening 【Laser Hardening Case Lineup】 ■ Fan-Shaped Plate Laser Hardening ■ L1200×10t Plate Laser Hardening ■ Knurled Surface Laser Hardening ■ Truck Plate Tip Laser Hardening ■ Wide Laser Cladding ■ Drill Hole Laser Cladding Repair

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Other shape processing examples

Other shape processing examples

We would like to introduce examples of our "other shapes" processing.

【High-Frequency Hardening Case Lineup】 ■ Gripper Pit High-Frequency Hardening 【Laser Hardening Case Lineup】 ■ Eyebrow Type Piston A Laser Hardening ■ Complex Shape Block Laser Hardening ■ Head Wrench Mounting Part Laser Hardening ■ Convex End Face Laser Hardening ■ Stopper Tip Laser Hardening ■ Taper Cone Outer Circumference Laser Hardening ■ Chuck Raw Jaw Laser Hardening ■ Small Holder Laser Hardening 【Laser Cladding Case Lineup】 ■ Wide Laser Cladding

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高周波焼入れ事例集 Vol.01〜13

高周波焼入れ事例集 Vol.01〜13

単品、量産、試作、大型品まで自社製コイルで対応する高周波焼入れ事例集

耐摩耗性、疲れ強さ、じん性の向上を目的とした鋼の表面硬化法として広く活用されている高周波焼入れの事例をご紹介します。 【事例ラインアップ】 ■ヘリカルギヤ一歯移動歯先高周波焼入れ ■Φ720ギヤ歯底一発高周波焼入れ ■L字プレート高周波焼入れ ■中間ジョイント高周波焼入れ ■スピンドルインターナルギヤ高周波焼入れ ■リングガイドウェイ高周波焼入れ ■ウォーム軸一歯回転高周波焼入れ ■φ150シャフト高周波焼入れ ■大型レバー高周波焼入れ ■ラックギヤ高周波焼入れ ■グリッパーピット高周波焼入れ ■大型シャフト高周波焼入れ ■大型リング溝高周波焼入れ

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Eyebrow-shaped piston A laser hardening case study

Eyebrow-shaped piston A laser hardening case study

There is a secret method for laser hardening in the R section!

【Conventional Issues】 - Coils are required for both the R part and the flat part, resulting in unnecessary time and costs. - Distortion after heat treatment leads to longer processing times even in post-processing. 【Benefits of Laser Hardening】 - No coils are needed for hardening, allowing for simultaneous reduction in lead time and costs. - Low-distortion hardening enables a reduction in post-processing steps. 【Specifications】 Dimensions: L1007×W310×T157 Material: S35C Depth: 0.5–1.0mm Hardness: HRC40 or higher

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M1.5 Small Gear Surface Movement Laser Hardening Case Study

M1.5 Small Gear Surface Movement Laser Hardening Case Study

Minimize distortion and maintain precision with localized laser hardening!

【Conventional Concerns】 There is a worry about distortion when wanting to case-harden the gear (finished product) from the catalog. There is also a concern that high-frequency hardening may result in the tooth's precision falling outside of JIS standards. 【Advantages of Laser Hardening】 Since only the tooth surface is locally hardened, it can minimize distortion after heat treatment. The precision of the teeth after heat treatment can also be kept within JIS standards. 【Specifications】 Material: S45C Depth: 0.3–0.5mm Hardness: HRC50–60

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Differences in laser hardening properties due to material variations.

Differences in laser hardening properties due to material variations.

This is an experiment on "hardness" and "depth" based on material!

[Experimental Method] In a laser hardening process with a width of 100mm, we investigated the differences that appear when S50C and SCM440 are hardened under the same conditions. Laser hardening was performed on a workpiece measuring 250mm × 150mm × 20mm under the same conditions, and after cutting the central part, the depth of the hardened layer was examined.

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Ring gear laser hardening case study

Ring gear laser hardening case study

Laser hardening can achieve low cost and shortened construction time with reduced distortion!

【Conventional Issues】 With conventional high-frequency hardening, while the heat treatment cost is reduced, the thermal impact becomes significant, causing distortion in the inner diameter, which necessitates secondary processing (finishing). 【Advantages of Laser Hardening】 With laser hardening, the heat treatment cost has become “one-shot hardening < laser hardening,” and since secondary processing of the inner diameter can be reduced, the overall cost is lower and the project timeline is shortened with laser hardening. 【Specifications】 Dimensions: φ596×22W×M4×147T Material: S45C Depth: 0.5mm Hardness: HRC57 or higher

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Case of laser hardening of keyway for small-diameter ball screws.

Case of laser hardening of keyway for small-diameter ball screws.

Ideal hardening that only hardens the key groove area with laser hardening!

【Conventional Issues】 In conventional heat treatment methods, there was no means to locally harden a small-diameter (φ8) and thin-walled key groove without affecting the threaded section. *If the threaded section is hardened, there is a high risk of cracking. 【Benefits of Laser Hardening】 Laser hardening achieves ideal hardening by minimizing thermal impact on other areas and hardening only the key groove section. (Moving hardening) 【Specifications】 Material: SCM445 Depth: 0.5mm UP Hardness: HRC60

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Case study of laser hardening on knurled surfaces.

Case study of laser hardening on knurled surfaces.

You can perform laser hardening on jagged surfaces too!

【Conventional Issues】 I wanted to harden only the tip of the knurl, but with high-frequency hardening, the entire surface becomes hardened, causing overall distortion. Additionally, due to processing considerations, areas with thinner wall thickness are at risk of melting due to edge effects. 【Advantages of Laser Hardening】 By hardening only the tip that comes into contact with the counterpart, distortion caused by heat treatment was minimized. Furthermore, with laser hardening, distortion correction hardening can be performed on the backside, further reducing distortion. 【Specifications】 Material: S45C Hardness: HRC 55-57 Depth: 0.5-0.8 mm

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Case study of laser hardening of convex end surfaces.

Case study of laser hardening of convex end surfaces.

We will harden only the small protrusions with laser hardening!

【Conventional Issues】 With high-frequency hardening, it is difficult to harden only the edge surface of the protruding part without affecting other areas with heat. The heat influence on other parts can lead to distortion, making post-processing likely necessary. 【Advantages of Laser Hardening】 With laser hardening, it is possible to precisely target and harden only the edge surface of the protruding part. Since there was almost no heat influence on unnecessary areas, there were no issues with distortion after heat treatment. 【Specifications】 Material: S45C Hardness: HRC 45 or higher Depth: 0.7mm

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Laser Hardening Case Collection <Presented as a set of 4>

Laser Hardening Case Collection <Presented as a set of 4>

Equipped with comprehensive facilities, capable of handling a wide variety of projects. Numerous examples of problem-solving are showcased.

Currently, we are presenting a collection of four volumes titled "Laser Hardening Case Studies," created based on examples of problem-solving we have handled so far. Our company utilizes extensive know-how and equipment related to laser hardening to support solutions for issues concerning heat treatment, such as distortion and cracking. We are equipped to handle various projects, including hardening of precision parts and complex-shaped components, covering everything from small-batch production to mass production and prototype development. 【Contents of the Case Studies (10 cases included in each volume)】 ■ Vol.01–10: M1 gear single tooth laser hardening, eyebrow piston A laser hardening, etc. ■ Vol.11–20: Complex-shaped block laser hardening, rotating shaft laser hardening, etc. ■ Vol.21–30: Ring V-groove laser hardening, cutter cam laser hardening, etc. ■ Vol.31–40: Chuck raw jaw laser hardening, large taper roll laser hardening, etc. *You can view detailed content immediately via "PDF Download." Please feel free to contact us with any inquiries regarding our technologies.

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