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线膛炮在发射一定发数炮弹之后射击精度就会降低。产生这种现象的原因是炮膛的磨损。在保养、清理和维修中如果粗暴地违反操作的要求,炮膛的几何参数和表面状况也会变坏。发射时炮膛的磨损情景是按下列方式进行的。弹丸在火药气体压力为20～50公斤/平方厘米时开始运动,弹带切入膛线。弹带的金属呈塑性状态並挤压形成凸起部。与膛线表面接触的弹带部分产生正常的应力和摩擦力。接触部位的温度可达500～800℃,甚至可达1083℃(铜的熔点)。
The rifled gun shoots at a fixed number of shots after shooting accuracy will be reduced. The reason for this phenomenon is the wear and tear of the bore. The geometry and surface conditions of the barrel can also deteriorate if the operation is grossly violated during maintenance, cleaning and repair. The firing chamber wear scenario is performed as follows. Projectiles in the gunpowder gas pressure of 20 to 50 kg / square centimeter began to exercise, strip into the rifling. The metal of the band is plastic and pressed to form a bulge. The portion of the strap that contacts the rifling surface produces normal stress and friction. Contact temperature of up to 500 ~ 800 ℃, or even up to 1083 ℃ (copper melting point).