Inside gear ring is wind gearbox core important components, currently used more carburizing quench internal gear aggrandizement, however inner teeth laps of carburizing quench distortion severely affect product quality and production schedule. Although the process optimization, tooling inner ring finalize the design quenching etc to avoid deformation measures have obtained certain effect, but for inner teeth 1500MM within the large diameter gear ring of heat treatment of distortion is still very serious, finalize the design tooling manufacture and late gear grinding cost remained high, but also seriously affect production cycle. Some manufacturers adopt inner teeth induction hardening, or inner teeth nitriding process such as tooth face reinforcement method, although the basic heat distortion can solve problems, but also exists some corresponding deficiencies. Such as induction hardening need special quenching machine tool, one-time investment cost is higher, and process stability is poor, man-made influence is bigger, accomplish truly imitation tooth-type quenching aspects is not mature yet. Similarly, ion nitriding process also need special equipment, large nitriding furnace equipment reliability also has certain problem, and nitride carbonitriding layer also relatively shallow, nitriding temperature control, part bowl, all of these make process stability is hard to get guarantee. Therefore, although these years much work has been done, but, with high risk of wind power industry, especially for wind power gearbox core important components inside gear ring however, it is hard to get the currentgoldstandard.

With China’s rapid economic development of wind power, wind power equipment manufacturing investment enthusiasm unprecedented upsurge, especially large capacity megawatts level large wind turbine generators, but also won the market in great demand. The fan inside gear ring is bigger and bigger, and can use of heat treatment of reinforcement method is getting scarcer. Has seen and heard. Recently, some companies proposed that using laser quenching method of gear tooth surface strengthening. Recently, my company in laser quenching areas have done some process and performance test, in some important products of small module gear and axial parts also be very good application, solve the conventional heat treatment can solve technical problems.

Laser quenching is also a recent rapidly develop potential parts surface reinforcement method, is the present national energetical support of energy conservation and environmental protection industries. From the only test, we can see the laser quenching process stability were carburizing bad, but better than the induction hardening, especially to better solve dedendum circle of strengthening problems and parts harden deformation degree also greatly superior induction hardening, laser quenching and induction hardening impact resistant capability close, data of discreteness also relatively little for the induction hardening process. Although laser quenching depth of hardening layer also relatively shallow, but the than nitriding carbonitriding layer to deeper. Of course, laser quenching also need special equipment, technology and operation wind power electric generator personnel cultivation than other conventional treatment more difficult. Process normative nor other conventional heat treatment mature. In a high risk of fan large modulus gear ring on the same risks, must pass a large number of experiments, the extract necessary test data. Should not be protects adopted. Nevertheless, according to the current test, we can see the laser quenching, he still be solve fan gear ring strengthen a effective method.

In the national vigorously develop clean energy policy support, now the windmill power industry to rapid development, market competition is more intense. It will ieyasu twilit Eight, the situation. In cooperation and development, competition for survival. Not the best, but beg applicable. But the scientific and technological innovation, walk the road of scientific development, is run away from the trap of important ways.

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