The results show that with the addition of trace elements (mass%) such as ① 0.187Al+0.013Ce+0.24Fe+0.1Zr+0.1Ti+0.1B, ② 0.5Ti, the suitable cold strain was 85%, leading to improve the strength in both cold deformation state and microduplexed state.
The effects of cold working on the aging precipitation of Cu-0.3Cr-0.15Zr-0.05Mg alloy are investigated by the hardness and electrical conductivity analysis and microstructure TEM( transmission electron microscopy) observation of the alloy.
The process of precipitation of the secondary phase could be accelerated with cold working before aging, so the conductivity microhardness of the alloy were greatly improved during this time. Aging at 480℃ for 2h after 60% cold working, the conductivity and microhardness of the alloy reached to 83.32%IACS and 159Hv respectively, but they were only 70.58%IACS and 112Hv upon directly aging after solution.
The effect of cold working of marstensite and α→γ reverse transformation on the behavior of austenite recrystallization and the ways of the grain refinement of austenite grains were studied on a Gleeble 1500 thermomechanical simulator for low carbon steel SS400 by cold working marstensite + tempering, and recrystallization or + α→γ reverse transformation.
The results showed that the hardening effect of alloy after deforming aging is much better than the alloy without deforming aging, after solid solution treatment in 870℃×1h+cold deforming by 40%～50% +aging at 480℃×1.5h, the alloy takes on good comprehensive properties. Such as: the microhardness is higher than 131HV, and the electrical conductivity is higher than 92.82%IACS.
The effects of solution,aging and cold deforming before aging on the properties of Cu-0.1%Ag-0.1%Cr alloy were analyzed. This alloy was of good integrated property after solution treatment at 870℃×1h,cold deforming by 40%～50% and aging at 480℃×1.5h.
By means of microhardness testing and electrical conductivity testing as well as TEM analysis, etc. , the effects of solid solution temperature, aging and cold deforming before aging on microstructure and properties in Cu-0.1%Ag-0.1%Cr alloy were analyzed.
The article discusses the effect of the shape of the channel and of the blowing of a cold working gas through the side walls on the steady-state flow of a gas along the positive column of a direct-current arc.
Cold working lowered the transition temperature of the h.
No transformation intoβ-Hg during cold working was found.
Cold working at 4.2 K produced a strong irreversible effect onTc.
A cold working steel was coated both with high temperature CVD (TiN) and moderate temperature CVD (Ti[C,N]).
Prior cold work significantly improves the tensile strength by enhancing T1 precipitation in all the alloys investigated.
The ordering kinetics was followed for an annealed sample and a cold-worked one, in order to show that the effect of cold work on the ordering processes is not negligible.
These changes are reversible and can be cancelled by a suitable amount of cold work.
Structural, mechanical and electrical properties of 99.994% Al sheets have been observed with respect to cold work and recovery degree.
Spot, line and area analyses of coated cemented carbide and cold work steel samples by using a computer-controlled, motorized x,y-stage are demonstrated and the most important errors influencing precision and accuracy are discussed.