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高速噴射的彈丸顆粒連續(xù)不斷撞擊齒面的過程，如同無數(shù)小錘對齒面進行錘擊，使齒面產(chǎn)生極為強烈的塑性形變，使 齒面產(chǎn)生一定厚度的冷作硬化層，這一硬化層即齒面的強化層，由此產(chǎn)生強化及表面壓應力，達到提高齒輪疲勞強度和提 高使用壽命的一項表面冷處理強化技術(shù)。噴丸強化也稱之為強化噴丸或受控噴丸。

齒輪噴丸強化是一種受控的噴丸技術(shù)，是將高速的彈丸流連續(xù)不斷撞擊齒面，使齒面在彈丸流的撞擊作用下發(fā)生塑性 變形(塑性變形層的厚度通常處于0.1-0.8mm之間)。這一影響延伸到齒輪材料的表層，在表層下產(chǎn)生較高的殘余壓應 力、加工硬化和組織細化等有利的變化，抵消不良的拉應力，該殘余壓應力延緩了的疲勞斷裂的形成，有效的提高了齒輪 的疲勞強度，延長了齒輪的使用壽命。

The high-speed projectile particles continuously impact the tooth surface, just like countless small hammers hitting the tooth surface, so that the tooth surface produces extremely strong plastic deformation, so that the tooth surface produces a certain thickness of cold hardening layer, which is the hardening layer of the tooth surface, resulting in strengthening and surface compressive stress. A surface cold treatment strengthening technology to improve fatigue strength and service life of gears. Shot peening is also known as enhanced shot peening or controlled shot peening.

Gear shot peening is a controlled shot peening technology, which is to continuously impact the high-speed projectile flow on the tooth surface, so that the tooth surface will undergo plastic deformation under the impact of the projectile flow (the thick?ness of the plastic deformation layer is usually between 0.1-0.8mm). This effect extends to the surface of the gear material, where higher residual compressive stress, work hardening and microstructure refinement and other favorable changes are generated under the surface, which offset the undesirable tensile stress. The residual compressive stress delays the formation of fatigue fracture, effectively improves the fatigue strength of the gear and prolongs the service life of the gear.