Connecting channel of automobile discharge device by nitrogen treatment

The invention discloses a connecting channel of an automobile discharge device by nitrogen treatment. The connecting channel comprises a main body and a process of the nitrogen treatment, wherein the main body is a square channel structure; a circular baffle plate is arranged above the left side of the main body, and is set as a first baffle plate provided with a through hole in the middle; a semicircular baffle plate is arranged at the right side of the main body, and is set as a second baffle plate; and the bottom of the second baffle plate is set as a plane structure. The nitrogen treatment comprises the following steps: firstly, oil is removed by gas before nitriding treatment; then, the sand blasting is performed for the surface by using aluminum oxide powder; and finally, a treated part is put in a nitriding furnace, and is heated after a cover of the nitriding furnace is sealed. The connecting channel has the characteristics of excellent wear resistance, fatigue resistance, corrosion resistance and hig