What is shot blasting 筆舊strengthening? Mechanical p東的rinciple of shot blasting streng在店thening

Shot blasting strengthening is a cold舊雜 working process used to p下一roduce a residual comp妹刀ressive stress layer to 什風improve the mecha媽高nical properties of metal. S錢場hot peening streng雨刀thening uses shot blasting (round m件書etal, glass or ceram他廠ic particles) t謝北o strike the metal surface with暗金 enough force to produc銀短e plastic deformation. The use of sho通樂t blasting impact can make the視刀 metal surface plastic d司暗eformation to change the me得雨chanical properties of the metal他拍 surface.

The main advantage of shot blasting is光頻 to delay or pre北和vent cracks in highl錯新y tensile stress alloy書從 components.

We can transform these p厭海oor manufacturing and ope廠間rating tensile str時美esses into residual compressive s做內tresses that can improv是湖e the service life, thus 東數extending the service life of the co妹船mponents.

This process generates residual compr道長essive stress on the surface of the 業著component. Compressive stress h頻照elps prevent cracks from dev票老eloping because they cannot pr市一opagate in the compression envi河舊ronment created by sho師山t peening.

When each shot blasting i冷劇s sprayed on the surface民拿 of the component, smal草你l indentation will be ge哥司nerated, which will r東事esult in compress美雨ive stress. Therefore, if there 遠計is a dent on the surface o中還f the component, it indicates tha時通t the material belo藍舞w the dent is compre麗間ssed. The impact of shot blasting no女腦t only produces a de海綠nt on the surface, 影又but also thousand志服s of dents. Finally, a月土 compressive stress lay近有er is formed on the 間她surface of the componen暗路t.

The benefits of this process ha也現ve been proven, su時習ch as components wi西近th relatively short servi如弟ce life under high stress conditions公林 (such as F1 racing cars) a北了nd key components with 爸廠longer service life and mo土做re stability used in aeroengines and場醫 structural par道師ts.

process control

The value of residual stress depends o時又n some variables, includ草報ing shot blasting process paramet電電ers and hardness of component金家 materials. Since this process is of拍哥ten used to enhance the姐煙 performance of critica海靜l safety components, it is i村鄉mportant to ensure that the correct 線通stress intensity is achie遠煙ved and that high repea土地tability is achieved. It is important 城男to do this.

This process uses 輛暗a system to measure the energy gener南銀ated by shot blasting, s高來o no estimation is日煙 required. This is achieved through時黑 the 'Almen公放' coupon testing pro朋到cess.

Almen test piece is made of sprin黃睡g steel, with strict hardness and 化務flatness tolerance, and 哥窗shot blasting impact is con討姐ducted only on one side. Th來術e induced compressive stress will cau煙器se the specimen to bend or a人玩rc. The bending d弟文egree is proportional 哥快to the energy generat有議ed by shot blasting, and can 紙個be measured with the Almen gau分體ge. The arc height generated畫人 by Almen test pie區費ce varies with the s到東peed and quality o店議f shot blasting, that is, the en低匠ergy generated by shot flow but absorb答腦ed by the test piece.見兒

If the shot blas那村ting time is doubled and the a醫計rc height or deflection of Almen te唱問st piece is increased by 10% or less低哥, the component 什拍saturation is c上吧onsidered to have been rea的北ched.