Caracterización de las propiedades mecánicas de los efectos del post calentamiento de una junta soldada con el método de fricción del acero AISI 1045

Abstract

The aim of this study is to precisely elaborate on the mechanical characteristics resulting from the post-heating impacts on a weld joint formed through the rotary friction welding of AISI 1045 steel. The technical specifications for welding are: heating pressure of 30𝑘𝑔𝑐𝑚2⁄for 17.26s and the forging pressure of 70𝑘𝑔𝑐𝑚2⁄for a time of 9.19s. In the post-heating phase, it is desired to reach the 100% bainite phase, whose parameters are to exceed the austenitization temperature of 800C, obtaining 100% austenite, cool for 15s at room temperature until reaching 400C, where a transformation of 50% austenite is achieved, and 50% bainite, then keep constant in a preheated oven for at least 20 minutes and allow it to cool until it reaches the ambient temperature, reaching 100% bainite. The results obtained from the test without post-heating are: maximum stress of 868.78MPa, elongation of 0.2m/m and Young's modulus of 9615.41 MPa; with post heating are: 860.66MPa maximum stress, 0.1m/m elongation and 14405.18MPa Young's modulus. It is concluded that, with the parameters specified for rotary friction welding, with post-heating the elastic zone has improved, exceeding the Young's modulus by 37% than without post-heating.