Method for heat treatment of the welded joint of martensitic steel sheets with increased resistance to abrasive wear

摘要

the object of the application is the way connectors welded steel plate heat treatment that martenzytycznej enhanced resistance to use abrasive,in which to produce connectors welded plate steel martenzytycznej enhanced resistance to use abrasive thickness from 10 to 14 mm and expressed in percentage by mass, chemical compositionc - 0,40 ÷ 0,45; si - 0,13 ÷ 0,18; mn - 0,50 ÷ 0.55; p - max. 0015; s - max.0010; cr - 0,30 ÷ 0,35; ni - 1,95 ÷ 2,10: mo - 0,13 ÷ 0,15; b - 0002 ÷ 0004 of cev carbon equivalent? 0,76, weld speed of v? 140 mm / minwhen voltage of power electric arc: u = 9.5 v and energy measuring: q 0.5 kj / mm,stopiwem in a proportion of 80 - 85% stopiwa en iso 16834 - and gmn4ni2crmo and 15 ÷ 20% stopiwa en iso 14341 - and g3sil,tungsten oxide electrode track in należeniu power for individual layers of welds to 90 and maintaining temperature in the międzywarstwowej 250°c 400°c ti...the welding process is in the form of argon gas flow osłonowego transmission in quantities of from 9 to 11 l / min, is suchthe connector is received by austenityzowanie normalising temperature 900 - 920°c for 60 min and then cooled in air.successively by austenityzowanie differential at 930 - 940°c for 15 - 20 minand then cooling in mineral oil of kinematic viscosity in the 18 - 22 mm2 / s at? 105, and letting go at 200 - 220°c for 120 min,after which the cooling in the air.