Wear resistance of stainless steel belts in the process

Based on the single-particle micro-cutting model of stainless steel strips, the evolution law and productivity control of the residual stress on the surface of HR-2 hydrogen-resistant stainless steel workpieces by the grinding process are studied and analyzed. Mathematical model of residual stress in single-particle micro-cutting of abrasive grains for stainless steel strips. Orthogonal experiments are used to obtain the grinding process parameters and surface residual stress, the depth of cut for abrasive grains and the regression equation of tangential force, and the single-factor experiment is used to verify the grinding process. , obtain the influence law of grinding process parameters on the surface residual stress, surface abrasive cutting depth and tangential force, and conduct a comparison study between the single-factor experimental results and the mathematical model calculation results.

Results In the experiment, the residual stress changed from -130MPa to -345MPa when the abrasive particle size changed from 10μm to 50μm, the residual stress changed from -135MPa to -253MPa when the grinding pressure changed from 10N to 50N, and the change of rotational speed affected the residual stress results. The law is not significant; in the experiment of different process parameters of stainless steel strip, the error between the calculated value obtained by the model and the experimental value is basically within 10%.

Conclusion According to the results of the orthogonal experiment and the single factor experiment, it is concluded that the influence of the grinding process on the residual stress is from high to low: abrasive particle size, grinding pressure, and grinding speed; abrasive cutting depth and tangential force have a significant relationship with residual stress. ; The established single particle grinding model can predict the law of residual stress generation under different grinding process parameters.

The warpage problem in the asynchronous hot rolling process of the sandwiched stainless steel clad plate, the MSC.Marc finite element software was used to establish a three-dimensional thermal coupling model of the sandwiched stainless steel clad plate, and the thickness ratio, roll speed ratio, first pass reduction rate and Influence of the friction coefficient ratio between the rolling stock and the upper and lower rolls on the warpage deformation, plastic strain and rolling force during the composite rolling process.

The results show that the increase of the thickness ratio increases the plastic strain value in the x-direction and the rolling force, which aggravates the warpage deformation of the composite plate; the reduction ratio of the first pass has little effect on the warpage deformation of the composite plate; the roll speed ratio has little effect on the warpage deformation of the composite plate. The x-direction plastic strain has a great influence. With the increase of the roll speed ratio, the warpage curvature first decreases and then increases, which is opposite to the change of the rolling force. When the roll speed ratio is 1.15, the composite plate It is relatively straight; the reasonable selection of the friction coefficient ratio between the rolling piece and the upper and lower rolls can also have a certain inhibitory effect on the warpage of the composite plate.

The forming technology of spherical stainless steel plate for bridge bearing was studied, the structural characteristics and forming process of spherical stainless steel strip were analyzed, and the balanced control law of wrinkling and cracking in the process of deep drawing and bulging composite forming was discussed; the drawing coefficient was analyzed. According to the key process parameters that affect the forming, a rigid blank holder installation was designed, and the calculation of blank holder force, press tonnage, convex and concave die fillet radius and gap was completed, and a spherical stainless steel strip forming die was designed for separation requirements.

The results show that the spherical stainless steel plate forming die with the punch diameter reaching Φ2200 mm, after the mold trial correction, the uniform contour of the 12 spherical stainless steel plates pressed and formed is 1.78 mm, and the maximum difference in contour can be controlled within 1 mm. , The forming quality is stable, and the contour is less than 0.6 mm after being pressed with the spherical surface of the bearing steel, which meets the specifications and design requirements.

In which industries can precision stainless steel belts be used?

Completely disassembled iPhone7 Plus, Jiangsu Chengfei New Material Technology Co., Ltd

In which industries can precision stainless steel belts be used?

Completely disassembled iPhone7 Plus, Jiangsu Chengfei New Material Technology Co., Ltd