Impact of temperature changes on the microstructure and mechanical characteristics of AISI 304 submerged in 5% HCl solution.

This study aims to evaluate the behavior of stainless steel 304 grade after immersion into corrosive environments of 5% HCl solution. The initial temperature of four steel plates was selected as room temperature, 50 °C, 80 °C and 110 °C. One plate was considered in 'as received' condition.

The rock damage mechanism of combined rock breaking with saw blade and conical pick.

The combined rock breaking method with the saw blade and conical pick is proposed to improve the rock breaking efficiency. The numerical simulation of combined rock breaking with the saw blade and conical pick is established to investigate the rock damage mechanism. And verified and modified the numerical simulation model with the rock breaking comprehensive test bench, the quantitative analysis error is less than 0.