First of all, the hammer and sickle are associated with the Masonic symbol of the hammer and chisel. These items signified a clearly defined goal (chisel) and its firm manifestation (hammer). In European religious symbology, the hammer is associated with aggressive male force, physical (the hammer of the blacksmith Hephaestus in Greece) as well as deadly.
is a constructive-technical principle for human actions and volitions … Here we see the symbol of the unity of the workers and peasants, the symbol of the Soviet state.”
The historian and academician Yury Gauthier wrote in 1921 in his diary: “A sharpness has pervaded Moscow for several days: How will it end? The answer will be in the words “hammer, sickle” read in reverse!” The fact is that it sounds like “with a throne” [put together and inversed, the words for hammer (molot) and sickle (serp) create the word prestolom, meaning literally “with a throne”] – this is how Muscovites hinted at the dictatorial methods of the Bolsheviks.
From Byzantium to present-day Russia, the double-headed eagle still soars
In various religions, the sickle is interpreted as a symbol of death. In Christianity, the sheaves and the harvest are equated with the human souls that the Harvester, i.e. the Lord, will gather after the end of the world. It is interesting to note that during the Middle Ages death was depicted not with a scythe but specifically with a sickle.
https://www.rbth.com/arts/2014/07/19/serp_i_molot_38327.html