Hot press-formed member having excellent crack propagation resistance and ductility, and method for producing same

1. A hot press-formed member comprising:

a base steel sheet; and

a zinc or zinc alloy plating layer formed on at least one surface of the base steel sheet,

wherein the base steel sheet comprises, by wt %, carbon (C): 0.08-0.30%, silicon (Si): 0.01-2.0%, manganese (Mn): 3.1-8.0%, aluminum (Al): 0.001-0.5%, phosphorus (P): 0.001-0.05%, sulfur (S): 0.0001-0.02%, nitrogen (N): 0.02% or less, and a balance of iron (Fe) and other impurities, and

wherein the hot press-formed member comprises: a microstructure comprising 1-30 area % of retained austenite, and a Mn(wt %)/Zn(wt %) content ratio in an oxide layer of 0.5-1.2 μm in a thickness direction from a surface layer of the plating layer is 0.1 or more.

2. The hot press-formed member of claim 1 , wherein the base steel sheet further contains at least one selected from the group consisting of:

(1) at least one of chromium (Cr) and molybdenum (Mo), a total content thereof being 0.001-2.0%;

(2) at least one of titanium (Ti), niobium (Nb), and vanadium (V), a total content thereof being 0.001-0.2%;

(3) at least one of copper (Cu) and nickel (Ni), a total content thereof being 0.005-2.0%; and

(4) Boron (B): 0.0001-0.01%.

3. The hot press-formed member of claim 1 , wherein the microstructure further comprises: at least one of martensite and bainite, or at least one of tempered martensite and bainite.

4. The hot press-formed member of claim 1 , wherein the hot press-formed member has a prior austenite grain size of 10 μm or less.